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Alt.dcom.slip-emulators FAQ  V1.5   Aug 10, 1995

This has been completely re-organized, i.e. there is a some what
logical organization now with some of the descriptions you'd
asked for!  There is also some meat to the questions relevant to
Windows 95, etc.   

Steve Wilson
-------------------------------------------------------------------

Questions:

1.0 What is a Slip Emulator anyway?
   1.  What is a Slip/PPP emulator?
   2.  Is Slirp better using  SLIP or PPP?

2.0 Where to get Slip Emulator Software?:

   1.  Is Slirp Free to Use?  Will I be charged long distance fees for using
       this because it uses my modem?
   2.  Where can I get slirp?
   3.  Where are there precompiled binaries for Slirp for... ?
   4.  Where can I get precompiled binaries for TIA?
   5.  Where on Netcom is a pre-compiled version of slirp?

   (Need to add stuff about twinsock...anyone want to write this section?)

3.0 Emulator Configuration, i.e. How do I make this stuff work?

   1. Slirp starts up ok except doesn't display the DNS so I told
      it what the DNS was.  However, it won't load my local homepage?
   2. What should my network configuration look like for trumpet
      winsock for netcom?
   3. How do I use slirp to telnet into my linux box?
   4. What do the configuration files need to look like for linux?
   5. Is it possible to send mail from my Linux box to/thru Netcom while
   6. How do I set up slirp for an X connection?
   7. What are the new formats for the .slirprc commands in the .95x
      release of slirp? What are the new control port commands? 
   8. I'm trying to get shell via telnet on slirp, without 
      logging in again. What is the configuration?
   9. Does anyone have instructions/hints as to how to use Windows 95
      with slirp? 

4.0 Emulator Performance

   1. Tia/Slirp Benchmark (This is slirp .9o vs TAI 1.0 I think..)

5.0 Miscilaneous Problems/solutions...

   1. The posted solution from Dan(Author of SLIRP) for the .9o 
      lockup problem(RWIN adjustments, etc.)
   2. 32 bit Netscape on Win95 has DNS problems. Why? 
   3. Using OS/2 my baud rate say it's 1200. How do I make this faster for
      slirp?
   4. How do you login using the slirp.telnetd?
   5. Slirp says it's running 9600 baud. How do I make ir run at 14.4?
   6. Where can I find nntpd for netcom? How do I configure it for
      Netcom?
   7. TCPman launches when I try to run Netscape..but netscape never
      comes up?
   8. I start up a connection under Win95 and I only get a PPP connection?
      How do I configure it for slip?
   9. Why is using the telnetd better than just logging in twice? 
   10. Why doesnt' FTP-PM work with slirp?
   11. Will TIA 2.0 support PPP and CSLIP? Why don't they support ICMP?
       I'd love to see automagic port redirection as well?
   12. Why does rlogin work from the port master I'm dialing into, but
       telnet doesn't for setting up slirp between then end points? 
   13. Address 10.0.2.0 doesn't work under InterSlip from my Mac. Why not?
   14. How do I setup POP mail using slirp?

(note - I'm still not completely happy with this organization... but it's a start
            and it's all I've got time for at this point.  Next release...)

----------------------------------------------------------------------------
1.0 What is a Slip Emulator anyway?

Question 1.1

What is a SLIP Emulator?

A slip emulator is a piece of software that runs on the host machine that you 
call into. This software accepts the bits you throw it's way using SLIP  
and then submits these bits to the host computer for transmission on the
internet.
 
When bits are received from the internet for the remote system, the emulator
packages them up into the SLIP protocol and send them along to your remote
system.

Boy...that was terse and to the point ;-)

Another way of putting this is that the SLIP emulator acts as a middleman 
between the internet and your remote system.  Your remote system speaks SLIP
at the middleman, and he interprets it into the language used by the 
internet.  

These two languages aren't really that different, and actually, SLIP is the
same language as used on the internet plus some extra packaging to send it
over your phone line.  

You need to use SLIP (or PPP..explained later) over the phone line because 
you are transferring binary information instead of just text.  If you've used
zmodem or xmodem or kermit...you are using these protocols for the same reason
as you are using SLIP or PPP. The primary difference between these protocols 
and SLIP is that SLIP corresponds(as just mentioned) to the language of 
the internet (TCP/IP...Transport Control Protocol/Internet Protocol...
a real mouthful even as TCP/IP ;-)

----------------------------------------------------------------------------

Question 1.2

Leo Perez y Perez (perez@csulb.edu) wrote:
: Is SLiRP better as SLIP or PPP?
: or, what is the difference between them anyway?
:
: Leo Perez y Perez    
: perez@csulb.edu      

There are really three protocols available with slirp.

They are SLIP, CSLIP, and PPP.

The protocols have the following properties...

Slip is merely raw IP frames sent in between two Flag characters, one
indicating start, and the other indicating end of packet.  There is
an escaping method when either of the two flags appears inside the 
actual IP datagram.

CSLIP is sent via the same basic mechanism over the physical medium(your
phone line) but an added level of compression is applied to the 
header of the IP datagram itself such that the IP header is reduced
in sized from something like 40 bytes to something like 7 bytes.  This
savings happens on EVERY packet.  This is a style of compression that
is beyond the V.42bis compression algorithm used by your modem.  Estimates
give about a 20% increase in performance(give or take 10%).

PPP (or Point-to-Point Protocol) really might be classified more like
a byte oriented HDLC.  That means that it takes the IP datagram and puts
inside yet another encapsulating packet.  This packet has a CRC across
it so bad packets can be detected at the lowest level.  There are also
security features built into this protocol.  Basically, it is a far more
robust protocol than Slip or CSLIP.  PPP also has the added property that
the Slirp implementation can escape several control characters, so you
are more likely to get a successful link up on a line that isn't 
8 bit clean. (aka a serial line that has some sort of input processing
occuring.) 

>From previous performance measurements, people have found that CSLIP
is fastest when using Slirp.  Some folks(like me) wind up using PPP
over CSLIP because of the need for the escaping feature. In my case
this allows me to do ftp sessions that don't work under CSLIP.

Now, that is probably more than you ever wanted to know ;-)

Steve Wilson
----------------------------------------------------------------------------
2.0 Where to get Slip Emulator Software?:

Question 2.1

In article <waddell.803517481@hercules>, waddell@HERCULES.CS.UREGINA.CA 
says...
>
>Is SLiRP free to use (ie.  will I be charged long distance fees for using
>this because it uses my modem> or does it use the University's (or Unix 
>server's modem>?
>

Yes. SLiRP is a free copyrighted software.  SLiRP runs on your UNIX shell 
account and let's you connect to the internet.  You need a client PC with a 
TCP stack like Trumpet Winsock which uses your modem to access your shell 
account.  If there is a long distance charge to access your university's 
computer, then you will have to pay those charges, as well as, any usage fees 
that you are now paying.  Otherwise, you don't have to pay for accessing the 
internet.

Hope this helps,

Lynn Larrow        
llarrow@netcom.com                                Pacific Grove, CA
http://www.webcom.com/~llarrow/tiarefg.html (SLiRP/TIA/Trumpet Setup)
[Editor's note:  The above is a VERY useful home page, and is packed
 with more info than you'll find here!!]
----------------------------------------------------------------------------
Question 2.2

In article <DB9Hwz.BDL@agora.rdrop.com>, lucasa@postes.gaylord.org says...
>Could someone please inform me of a FTP site for the 
>updates to slirp?
>
>Lucas

ftp://peace.wit.com/danjo/slirp/  or
ftp://blitzen.canberra.edu.au/pub/slirp/  or
ftp://ibc.wustl.edu/pub/slirp_bin/

Lynn Larrow        "When the shoe fits, the foot is forgotten"
llarrow@netcom.com                                Pacific Grove, CA
----------------------------------------------------------------------------
Question 2.3

In article <3s35j8$eab@gulfa.kuwait.net>, kcc94td1@access.kuwait.net says...
>Anyone know where there are pre-compiled SLiRP binaries?  This would be 
>very helpful and highly appreciated :-D
>
>Khaled al-Feeli

Try ftp://ibc.wustl.edu/pub/slirp_bin/USE_AT_OWN_RISK/

I also have some other links to slirp binary sites at this URL:

http://www.webcom.com/~llarrow/tiafaqs.html

Hopefully they are all still active :)

Lynn Larrow                        
llarrow@netcom.com                                Pacific Grove, CA
----------------------------------------------------------------------------
Question 2.4

> Where can I get precompiled binaries for TIA?

You can get TIA by :
ftp: //marketplace.com/tia

There is also shareware for different systems under:

ftp: //marketplace.com/tia/shareware

----------------------------------------------------------------------------
Question 2.5

In article <stew1117DAJ8vy.96s@netcom.com>,
>stew1117@netcom.com (stewart coulter) wrote:
>I am trying to locate the latest version of slirp, the one site that I 
>tried I was unable to locate it any directories, please help me.  I need 
>the FTP site and directory.  Respond via email.

Folks on Netcom can get the release files and a few other doo-dads from my 
directory:

  ~ldobbs/slirp

The modified source for tcp_input.c (see other threads) is there, along with 
some simple (and undocumented) scripts to build the binary.

Lee Dobbs                     Milpitas CA            Voice: 408-946-7860
ldobbs@netcom.com                 USA                Fax:   408-262-9392
----------------------------------------------------------------------------
3.0 Emulator Configuration, i.e. How do I make this stuff work?

Question 3.1

In article <DBD1MG.6J5@zeno.fit.edu>, lkhan@winnie.fit.edu says...
>I have installed the latest version of slirp on the Unix machine.  It
>conplied properly (although I had to erase some files so it won't go over
>disc quota).  Using Trumpet Winsock, I ran it using the command line:
>"slirp -m 552 -c" (I set all the configurations as stated on the slirp home
>page.)  It shows all the messages at the beginning expect for the dns ip
>address.  So I used the "I.P. address of slirp" for the dns.
>
>When running Mosiac (ver. 2beta4), it wouldn't load the homepage.  The 
>messages at the bottom stop at "Waiting..." and sticks there forever, the
>little Mosaic "earth" still moves.
>
>What can be wrong??
>
>On the same machine, I can still run twinsock properly (it works.)

My best guesses would be one of two things.  The first is that using the IP 
address of the machine slirp is running on as your DNS isn't working.  In many 
university situations, they will have one or two machines which serve as 
nothing more than DNS servers.  You need to find out the address of these 
machines.  The best idea here would be to ask the sysadmin at your site.

The second good possibility is that a terminal server is interfering.  Using 
SLIP/CSLIP requires an absolutely clean 8-bit line, something that most 
terminal servers in a university setting have trouble with.  Try to find out 
if your terminal server has a 'terminal download' option, or something similar 
to set the connection to 8-bit clean.  Alternatively, try using SLiRPs PPP 
mode as you can escape control characters which may help the problem.  BTW, 
this would explain why twinsock works as it defaults to a 6-bit mode, which 
means it can run over almost any connection.  It also makes it dog slow.

Hope this helps.

Matt
mnm@goodnet.com
matt.moore@asu.edu
----------------------------------------------------------------------------
Question 3.2

In article <sfbDBtEx8.FCz@netcom.com>, sfb@netcom.com (sfb) wrote:
>I currently have a Netcom Shell Account and am using TIA to emulate slip.
> ...
>What should my settings be under Network Configuration?  I have tried 
>tons of various settings, such as 192.0.2.2 (works for Eudora) and 
>netcom.com

First, I suggest adding these to the end of your hosts file in the Trumpet 
directory:

(Editor's note - Should probably change the 192.0.2.x stuff to 10.0.2.x
 in the table below ... see the linux configuration info for what I mean..)

192.100.81.101  netcomsv netcomsv.netcom.com
192.100.81.105  ns.netcom.com
192.100.81.254  netcomgw netcomgw.netcom.com
192.0.2.1       local-pc
192.0.2.2	mail.netcom.com smtp-server pop-server
192.0.2.3	netcom.com news.netcom.com nntp-server

Then, in any winsock app that needs a POP or SMTP server (such as the Host 
and Relay Host for Pegasus), use mail.netcom.com -- for a news (NNTP) 
server, use netcom.com .

By the way, in my Trumpet File;Setup Nameserver setting, I've been using

  192.100.81.101 192.100.81.254 192.100.81.105

and I get very few name lookup delays.

Lee Dobbs                     Milpitas CA            Voice: 408-946-7860
ldobbs@netcom.com                 USA                Fax:   408-262-9392
________________________________________________________________________
Question 3.3

In article <frankDAGH97.Gu6@netcom.com> frank@netcom.com (frank) writes:
>Hi, Slirpers:
>
>How do I telnet into my linux box?  I redir the port 8888 to 192.0.2.0:23
>I am using SLiRP 0.9o.  But when I login to netcom and use
>telnet netcom8(or whatever).netcom.com 8888, nothing happened.
>Do I need to set my IP to 192.0.2.0 instead of 10.0.2.15?  Any help
>will be greatly appreciated.
>
>frank@netcom.com


Why don't you try redirecting it to 10.0.2.15:23  ???
________________________________________________________________________

Question 3.4

What do the configuration files need to look like for linux
for basic tcp/ip connetions to work with a slip emulator?

These files are configured for netcom..but hopefully will
serve as an example as to how to set things up....

/etc/hosts ----
127.0.0.1       localhost
10.0.2.15       darkstar local-pc
192.100.81.101  netcomsv netcomsv.netcom.com
192.100.81.105  ns.netcom.com
192.100.81.254  netcomgw netcomgw.netcom.com
10.0.2.2	mail.netcom.com smtp-server pop-server
10.0.2.3	netcom.com news.netcom.com nntp-server
/etc/resolv.conf ----
domain netcom.com
nameserver 192.100.81.108   (Editor's note - You might want to have
                                              several entries on this line so if one
                                             nameserver is down, there are alternatives locally.)
/etc/host.conf -----
order hosts, bind
multi on

I'm not going to try and explain how to use dip here...that's a bit much.
________________________________________________________________________
Question 3.5
In article <ekbondDACC0q.DFM@netcom.com>, ekbond@netcom.com (E. Kelly
Bond) wrote:

> Is it possible to send mail from my Linux box to/through Netcom
> while connected via TIA?
> 
> Any help will be appreciated.
> 
> Kelly
> ekbond@netcom.com

Yes, I am doing it.  You have to configure your domain name to netcom.com
and use sendmail with the smtp-only script in /usr/src/sendmail/cf, and
all will be great.  There are readmes in the sendmail directory how to use
m4.  It's a one liner.  Use sendmail -q to bump the queue into action when
you connect, or as part of your ppp-on script.

Oh, actually I am doing it with SLiRP, not TIA, but same thing...

Cheers,

-- Grant Bowman     <grantbow@netcom.com> 

________________________________________________________________________
Question 3.6

In article <3vn7vg$8s@seagoon.newcastle.edu.au> you wrote:
: Hi all!
: 	I'm currently trying to get an xterm window from the host machine 
: to my computer. I've tried the -X option and setting the DISPLAY 
: environment. When I type "xterm", I just get the I/O error 32. Broken 
: pipe or something like that on X server. Does anyone know what I'm doing 
: wrong?
:
: | Edmund Lai								|

Okay...lets review what you have to do.

First, in the .slirprc you have something like

redir X IP  (where IP is the number of the system you are typing at, ie
             whatever your fake IP address is.  Slirp uses 10.0.2.15 
             by default.  That is as good a choice as any unless you
             have other reasons to change it.)

Okay...next. IS YOUR X SERVER UP and ALLOWING REMOTE CONNECTIONS on
your home system?  If you are running linux at home, you need to say
"xhost +"  to allow all hosts to access your screen.  Note - this IS
potentially a security problem! This opens your system wide up to 
intrusion.  On the other hand...do people know you have X and slirp
running?

Finally, you need to telnet over to the remote host and type what
slirp told you to type in its' log on banner.  Something like
"setenv DISPLAY HOSTIP:offset" where HOSTIP is the host's IP number
and offset is the X socket offset from port 6000 that slirp 
grabbed(see below).   

Why do you have to do this you might ask...why isn't this number
you home system's IP instead?  Good question, and one I asked the
author before I stared at the code myself, and learned about unix
sockets;-)  What slirp does with ANY port redirection is open
up a unix socket, and start listening for traffic on that socket.
So when you say redir X IP, what you are saying is listen on 
port 6000(or 6000+ some number if 6000 is busy), and any 
connections you see on that number forward over the SLIP link
to the IP address I gave you.  

That means that you need to tell X clients to look for the X
server at a specific machine IP address:socket number to 
connect to your server that is on the other end of the phone 
line!  You do this by typeing "setenv DISPLAY HOSTIP:offset"
which is a variable, DISPLAY, that all X clients are sensitive
too.  

Notice the offset.  This might be a little confusing also.  Slirp
tries to grab socket 6000, but if the socket is already in use, 
it'll increment the socket it's trying to listen too until it
finds a free one.  So you might get 6007 as an example, if 6000-6006
are already in use.  To set the display variable correctly you need
to set the address to HOSTIP:7.  The X client is already smart 
enough to add the 6000 base address.  

Summary.  1) Set the redir X HOMEIP in slirprc
          2) Make sure that connecting hosts can access your server
             by getting the security right.
          3) Telnet to the host and do a setenv DISPLAY HOSTIP:offset
             corresponding to the slirp banner.

That should get you up and running X!

Good Luck,

Steve Wilson 

________________________________________________________________________
Question 3.7

: What is  the new format for .slirprc commands?  What commands
: are available on the control port? 

Note that versions of SLIRP after version "O" have many changes.
 
They require you to use a different, new format for [pty]exec in the
"$HOME/.slirprc" file.  Here is the new format:
 
SLIRP95c Usage: add ptyexec | ptyexec PROGRAM:[ADDRESS:]PORT
 
The new formats, the use of the $HOME/.slirprc-0 file (executed _before_
$HOME/.slirprc), and many other NEW features are clearly described in the
docs/CONFIG file, which is included with the SLIRP95c package.
 
There is a new HELP menu, with many options, here is what it looks like:
--= SLIRP 95c help menu =--
 
SLiRP command-line ready (type "help" for help).
Valid commands:
prompt               redir X              show X
redir                baudrate             special addr
control addr         host addr            add exec
add ptyexec          add emu              shell
debug                socket               log stats
config               log start            dns
help                 -h                   echo
exec                 ptyexec              unit
wait                 quit                 ppp
-all                 -ac                  -am
asyncmap             debugppp             -ip
-mn                  -mru                 -pc
+ua                  +pap                 -pap
+chap                -chap                -vj
-vjccomp             vj-max-slots         escape
domain               mru                  mtu
initiate-options     name                 user
usehostname          remotename           auth
proxyarp             login                lcp-echo-failure
lcp-echo-interval    lcp-restart          lcp-max-terminate
lcp-max-configure    lcp-max-failure      ipcp-restart
ipcp-max-terminate   ipcp-max-configure   ipcp-max-failure
pap-restart          pap-max-authreq      pap-timeout
chap-restart         chap-max-challenge   chap-interval
ipcp-accept-local    ipcp-accept-remote   bsdcomp
-bsdcomp             papcrypt
For more help type "help COMMAND" where command is either
one of the above commands or a portion of a command.
 
(Editors Note - This comes from the slirp .95c change log I believe)

________________________________________________________________________
Question 3.8 

in article <darkmarkDC5LEK.41n@netcom.com>says
>i'm trying to get shell via telnet on slirp, without logging in again.
 
1.a) Get the file:
 
    ftp://blitzen.canberra.edu.au/pub/slirp/extra/slirp.telnetd-b.tar.g
 
1.b) extract and compile it like you did with Slirp
 
1.c) place the binary into a directory that is in your path
 
 
[ Note:
[ Can anyone explain in detail what function slirp.telnetd
[ adds to slirp? Does it provide the 'telnet protocol'?
[ If so, what is contained in the telnet protocol - local echo?
[ Xon/Xoff flow control?
 
 
2) Add the following line to your .slirprc file (you may wish to pick
another shell).  I use:
 
    shell /usr/local/bin/tcsh
 
 
3) Add a line to your hosts file so you can telnet to your shell without
having to use the IP number, if you like.  For example, my hosts file
includes:
 
#
# Host file for use on winsock pc running TIA or SLiRP on shell account
#
 
# -- SLIP emulator names --
 
10.0.2.15       PC-name
10.0.2.2        emulator-host
10.0.2.2        pop-server
10.0.2.1        shell        <<<=== Add this line here
10.0.2.1        smtp-server
10.0.2.1        nntp-server news-server
 
(Above is just an example - you may wish to call your services by other
names.)
 
 
[ For you TIA users wondering how to use tia with slirp IP numbers...
[ my .tiarc:
[
[-n10.0.2.2
[-r10.0.2.15:21
[-p10.0.2.1:25 mailit
[-p10.0.2.1:119 nntpd.xover
 
4) If running Windows, setup an icon that passess the argument "shell" to
your favorite telnet application.  Double-clicking that icon will connect
you to the host and run a shell program.  I use:
 
     c:\winsock\ewan\ewan.exe shell
 
 
5) Running another shell will not execute the commands in your .login
file.  So, on your shell, move the commands alias, set, path, (everything
non-login environment related) from .login to .cshrc (or whatever shell rc
file you are using) so when you start up a new shell you will have things
the way you are used to them.  You could also just put a 'source .login'
in your .cshrc if you like.
 
[ I'm don't really understand UNIX enough to know what
[ gets passed in to child processes in UNIX -
[ anyone what to jump in here?
 
 
And I think you should be in business.  I hope I haven't forgotten
anything.
 
Bill                
moseley@netcom.com  
________________________________________________________________________
Question 3.9
Alex Clamann (aclamann@vcu.edu) wrote:
: Does anyone have instructions/hints as to how to use Windows 95
: with SLiRP?
 
Works great!
 
1) Install TCP/IP under network in the control panel
2) The numbers 10.0.2.0 is the default gateway under IP settings in the
   control panel
3) The number of the local address is 10.0.2.115
4) Set the DNS server to whatever slirp gives you, (the second and
   third on netcom as the first seems to change)
5) under the win config the very last box needs to be checked. (note:
   this is second hand from a friend, and he can't remember what the box is
   called. :( )
6) create a dialup network account, (it's an option in the dialup network
   program group)
7) make sure to set the modem setup box and select <bring up dialog box
   after dialing>, (that lets you log in and start slirp.
8) then set server type to PPP
9) use the connect button and when the dialog box comes up, type in your
   name and password.
10) run slirp with the -P switch (this tells slirp to use PPP)
11) then press continue and win95 should tell you that you are connected.
 
once the connection is running you can use the win/95 utils or the win/95
version of the web browsers.  Note: Netscape 32bit is at www.netscape.com

                                                    jtessin@netcom.com

(Editors Note - Another VERY detailed response to this question  
 is found below - I'd love to get feedback as to which I should 
 keep!!!!)

>Are there instructions available on how to configure win95,slirp,Free
>Agent, and Netscape?  And if so would someone post it or its address?
 
 Note:  The instructions below now accomodate multiple dial-ups by
 localizing the IP addresses to each dial-up entry, rather than making
 them global throughout the system.  Revisions have also been made for
 better clarity.
 
 The following are comprehensive instructions on getting Win95 to
 network over a dial-up using SLIP/PPP, with consideration for TIA &
 SLiRP.  These are specific to the CD release version (950r6) of Win95.
 These assume that you have a modem, a phone line, and have an Internet
 account with an ISP (Internet Service Provider).
 
 Info needed:  Your IP address (if static IP); your ISP's name, domain
 names, and IP addresses.
 
 Components needed:  Dial-Up Networking; DSCRIPT; TCP/IP.
 
 **Always select OK to close a settings screen and not the Close (X)
   button, or otherwise the changes you made will be ignored.

 ----------
 
 ADDING NEEDED COMPONENTS:
 
 To add Dial-Up Networking,
    Open Start | Settings | Control Panel | Network | Add | Adapter |
       Microsoft | Dial-Up Adapter.  Click OK.
    The Dial-Up Adapter should now be present in the Network window.
       Win95 will ask to restart system, don't restart just yet.
    Delete all other entries in the window (aside from the Dial-Up
       Adapter), by selecting them and clicking Remove.
 
 To add DSCRIPT,
    Open Start | Settings | Control Panel | Add/Remove Programs |
       Windows Setup | Have Disk.
    Enter [CD drive]:\ADMIN\APPTOOLS\DSCRIPT and press OK.
    [Note: DSCRIPT may not be present in the Win95 floppy disk version.]
 
 To add TCP/IP,
    Open Start | Settings | Control Panel | Network | Add | Protocol |
       Add | Microsoft | TCP/IP.  Click OK.
    You should now have the Dial-Up Adapter and TCP/IP icons in the
       Network window.  Win95 will ask to restart system.  Press No
       to keep on going.
    Select TCP/IP, and click on 'Properties'.  Select 'Gateway' tab.
       Enter  1.0.0.1, and press the Add button.
    Press OK's until you've closed the Network screen.
 
    After rebuilding its driver database, Win95 will again prompt you to
    restart the system.  Select No to keep on going.
 
----------
 
 MAKING A DIAL-UP ENTRY:
 
 Open Start | Programs | Accessories | Dial-Up Networking.  Win95 will
    activate the Make New Connection wizard.  Press Cancel for now.
 Select Connections (in the Dial-Up Networking folder menu) | Settings.
    Enable 'Redial' (retry = 99, 0 min 1 sec between retries).
    Select 'Don't prompt to use Dial-Up Networking'.  Press OK.
 
 Double-click on the Make New Connection icon.
 Enter name of the ISP for the top box (ex: Eskimo North).
 Select your modem from the list, or let Win95 autoselect your modem
    (if modem is not already set up).
 Select 'Configure' (modem)
    [General]
       Select max speed (I use 57600 for 28.8K, for typical 2:1
          compression ratio).  Click OK.
    [Connection]
       Enable 'Cancel the call if not connected within _60_ secs'
       Enable 'Disconnect a call if idle for more than _15_ mins'
 Click Next; enter the ISP's telephone access number when prompted
    (no area code, unless it is a long-distance call.)
 Click Next; enter a name for the dial-up entry (ex: Eskimo).
 Click Finish.  A connect icon for the ISP will appear in the folder.
 
 Right-click on the connect icon.  Select Properties | Server Type.
    Select SLIP, CSLIP, or PPP (use this for SLiRP or TIA 2.x) from
       the drop-down menu.
    Disable 'Log on to network'.
    Disable 'NetBEUI' and 'IPX/SPX Compatible'.
       [If you select SLIP or CSLIP, these will already be greyed out.]
    Click on 'TCP/IP Settings'.
       Select 'Specify name server address'.
          Enter the IP address(es) of the various domains of the ISP.
          (Ex: for Eskimo, enter 204.122.16.13 for main server,
          204.122.16.40 for tia server)
       If dynamic IP address, select 'Server assigned IP address'.
       If static IP address, select 'Specify an IP address' and enter
          your IP address, as provided to you by your ISP.
 
       If TIA or SLiRP, select 'Specify an IP address' and enter
          192.0.2.1 (anything you want, really) for IP address.
 
 You can drag the ISP icon you've just made out onto the desktop for
 quicker access.  Repeat this section for any additional dial-up entry
 you want to create.
 
 ----------
 
 MAKING A LOGIN SCRIPT:
 
 You've made a dialing connection icon for the ISP, but you need a
 script to get past the login and start SLIP/PPP/TIA.  DSCRIPT will
 handle this chore.
 
 Open Start | Programs | Accessories | Dial-Up Scripting Tool
 
 The dialing connection you've just made should be presented as an entry
 inside the Connections window.  Since it's the only entry, it should
 already be highlighted.  Click on 'Browse', and select one of the
 sample script (SCP) files for modification.  Then click on 'Edit' to
 modify the file to fit your ISP login.  Below is a sample script for
 Eskimo North:
 
 ; Eskimo North login script
 proc main
    transmit "^M"
    waitfor "Selection ==>"
    transmit "4^M"
    waitfor "login:"
    transmit "YourName^M"   ; replace with your login name
    waitfor "Password:"
    transmit "YourPasswd^M" ; replace with your password
    waitfor "bash$"         ; replace with your prompt
    transmit "tia -ppp^M"   ; use this for TIA 2.x
    ;transmit "slirp -b 57600 -P^M"  ; use this for SLiRP
    ;set ipaddr getip 2     ; use this for dynamic IP address
 endproc
 
 Save the script.
 Enable 'Start terminal screen minimized'.
   [For script debugging purposes, you can elect to disable the 'Start
   terminal screen minimized' option and/or enable the 'Step through
   Script' option.]
 Restart Win95.
 
 Note:  Accessing the SCRIPTER.HLP file may be problematic, as it has no
 accompanying .CNT (contents listing) file.  I wasn't able to access its
 Topics List, which means no access to the command syntax listing.  I
 ran the help file through an ASCII filter, and reconstructed the syntax
 listing after some reformatting.  If there is sufficient interest, I'll
 repost it as an addendum.  [The Plus! pack's "Internet Option" has the
 identical Dial-Up Scripting Tool as included in the base Win95 CD, but
 it has an accompanying SCRIPT.DOC which has the command syntax in it.]
 
 ----------
 
 TESTING THE SETUP:
 
 Double-click on the dialing-connection icon for the ISP, and click
 Connect.  (You don't have to enter your name/passwd, since you've
 already hardcoded it into the script file.  Be aware, however, that the
 scripts are saved in plain ASCII which may pose a security problem for
 multi-user setups).  If everything goes smoothly, you will get a
 Connect message.  (I've noted that with SLiRP, it takes as long as half
 a minute for the TCP/IP connect to be made after the SLiRP command is
 given to the host shell.)
 
 After the Connect message, minimize the window onto the TaskBar, and
 open up a DOS box.  Enter 'telnet [ISP domain name]' (ex: telnet
 eskimo.com) to connect to your ISP.  If telnet is successful, then the
 setup is good, and you are in business.
 
 Win95 also has some other command-line TCP/IP utils, the most important
 of which is FTP.EXE.  Between) telnet and ftp, you have the tools to
 acquire other winsock apps from the net to add to your stable.
 
 hpham@eskimo.com (Hoang Pham) 

________________________________________________________________________


4.0 Emulator Performance

Question 4.1

SLiRP has become stable and the lock-up bug was finally fixed(?).
I think it's time for new benchmark test on TIA and SLiRP. 

(*** Well, seems like I will have to do another test in 2 weeks. 
TIA 2.0 beta will be released in next month. I just got new TIA news.)

Anyway,

I performed a small benchmark test using ws_ftp. The method used is mostly
the same as the previous test I did and posted here few month ago.

I transferred file between UNIX host and local PC over serial line three
times in each direction and averaged the speed (in Kbps).

This time I could use the same Trumpet setting for both TIA and SLiRP,
which means you can compare data of the two directly. Also, I used
both compressed and non-compressed files in the tests.

Let's show you the result first.


WS_FTP.EXE (150944 byte, a binary executable)
=============================================
	TIA	SLiRP
	SLIP	SLIP	CSLIP	PPP
---------------------------------------------
Downld	18.06	17.31	18.53	18.45 (Kbps) 
Upload	18.94	18.88	19.35	19.30
=============================================

WS_FTP.ZIP (117641 byte, ZIP compressed)
=============================================
	TIA	SLiRP
	SLIP	SLIP	CSLIP	PPP
---------------------------------------------
Downld	15.87	14.97	16.24	16.14 (Kbps)
Upload	16.36	16.32	16.70	16.66
=============================================

What do you think? It's interesting, isn't it?

* Actually, the result is not much different from the previous test.
In the previous test, I used MTU of 552 for Slirp and I thought it
made Slirp slower than TIA. However, Slirp is still slower than the
TIA in SLIP. Slirp gave me *really* good result in CSLIP and PPP. 
CSLIP is slightly faster than PPP but I think the difference has 
become small. (Acutually, I lost the old result. ^^; Am I telling 
you the truth?)

* As a result of tcp_input.c fix, Slirp now works even if you don't
use Passive mode in ws_ftp. However, you should always get faster
transfer if you use Passive mode. This applies to TIA, too.  

 
#####
Here's hardware and software information:

UNIX  -- SparcSun-4/280. SunOS-4.1.3
PC    -- Toshiba T3400, i486SX-33MHz, 4MBram, Windows for Workgroups.
Modem -- US Robotics WorldPort 14.4K PCMCIA Fax/Modem.

WS-FTP version 95.06.11
	Recv Bytes 4096
	Send Bytes 1500
	*Passive Mode* is used in all transferres.

Trumpet Winsock version 2.1b 
	MTU 1500, RWIN 4096, MSS 1460.
	Baudrate 38400

TIA version 1.04c (beta)

Slirp version 0.9o (tcp_input.c fixed)
			[.slirprc]
	SLIP		CSLIP		PPP
	************** 	**************	*****************
	Baudrate 38400	Baudrate 38400	Baudrate 38400
	mtu 1500	compress	ppp
	mru 1500	mtu 1500	mtu 1500
			mru 1500	mru 1500
					asyncmap 00000000
	**************	**************	*****************


*** All Data ***

## TIA ##
[SLIP]	ws-ftp.exe			ws-ftp.zip
--------------------------------------	------------------------------
	Down		Up		Down		Up
	(Sec)	(Kbps)	(Sec)	(Kbps)	(Sec)	(Kbps)	(Sec)	(Kbps)  
--------------------------------------	------------------------------
1.	81.8	18.08	78.0	18.95	72.6	15.88	70.4	16.37
2.	82.0	18.04	78.1	18.94	72.9	15.82	70.5	16.35
3.	81.8	18.08	78.2	18.92	72.5	15.90	70.4	16.37
--------------------------------------  ------------------------------
Ave.	81.9	18.06	78.1	18.94	72.7	15.87	70.4	16.36
--------------------------------------	------------------------------

## SLiRP ##
[SLIP]	ws-ftp.exe			ws-ftp.zip
--------------------------------------	------------------------------
	Down		Up		Down		Up
	(Sec)	(Kbps)	(Sec)	(Kbps)	(Sec)	(Kbps)	(Sec)	(Kbps)  
--------------------------------------	------------------------------
1.	85.6	17.28	78.4	18.88	77.3	14.92	70.7	16.31
2.	85.5	17.31	78.5	18.84	77.0	14.98	70.6	16.32
3.	85.4	17.33	78.2	18.91	76.8	15.02	70.6	16.32
--------------------------------------  ------------------------------
Ave.	85.5	17.31	78.4	18.88	77.0	14.97	70.6	16.32
--------------------------------------	------------------------------


## SLiRP ##
[CSLIP]	ws-ftp.exe			ws-ftp.zip
--------------------------------------	------------------------------
	Down		Up		Down		Up
	(Sec)	(Kbps)	(Sec)	(Kbps)	(Sec)	(Kbps)	(Sec)	(Kbps)  
--------------------------------------	------------------------------
1.	79.8	18.53	76.4	19.36	71.0	16.24	69.0	16.70
2.	79.8	18.53	76.5	19.33	71.0	16.24	69.0	16.70
3.	79.8	18.53	76.4	19.36	71.0	16.24	69.0	16.70
--------------------------------------  ------------------------------
Ave.	79.8	18.53	76.4	19.35	71.0	16.24	69.0	16.70
--------------------------------------	------------------------------


## SLiRP ##
[PPP]	ws-ftp.exe			ws-ftp.zip
--------------------------------------	------------------------------
	Down		Up		Down		Up
	(Sec)	(Kbps)	(Sec)	(Kbps)	(Sec)	(Kbps)	(Sec)	(Kbps)  
--------------------------------------	------------------------------
1.	80.1	18.46	76.6	19.30	71.5	16.12	69.2	16.66
2.	80.3	18.42	76.6	19.30	71.4	16.15	69.2	16.66
3.	80.1	18.46	76.7	19.29	71.3	16.16	69.2	16.66
--------------------------------------  ------------------------------
Ave.	80.2	18.45	76.6	19.30	71.4	16.14	69.2	16.66
--------------------------------------	------------------------------

That's all. (Hope I didn't make any stupid mistake.)

Thanks.

---

Masa. <msato@calstatela.edu>

[Editors' note:  I think this one gets the best post of the week award!]
----------------------------------------------------------------------------

5.0 Miscellaneous Problems/Solutions

Question 5.1
>                           LATEST INFORMATION
>                  --------------------------------------
>
>  *  (21/6/94) I think I finally fixed the "locking-up" problem. Edit the
>    file tcp_input.c and uncomment the lines:
>    /* if (so->so_snd.sb_cc)
>    * (void) tcp_output(tp);
>    */
>    This means you can use a low RWIN again, and still have it work (I
>    hope).
>  *  (5/6/94) Get version 0.9o, it should fix the nasty SunOS problem, as
>    well as others. This will be the last release for around a month or
>    two (provided I find no major bugs (again)), since a) I have tests
>    coming up, and b) I'm planning big changes/additions to slirp for the
>    next release (It'll probably be a BETA release, finally).
>
>  [Back To SLiRP Home Page] [Features] [danjo@blitzen.canberra.edu.au]
>
>                Copyright 1995 Phase One WWW Publishing

I tried out the code change and it seems to be working fine for me.

I am now able to reduce my RWIN in trumpet back to 4 times my MTU and I have no lockups.

    o      _____         ||Jose Barandiaran | |joseb@twisto.compaq.com  |
----------------------------------------------------------------------------
Question 5.2

>sterns@rahul.net (Steven Stern) wrote:
>Hi,
>    I'm running Win95 (build 484) and just tried to run the 32 bit
>version of Netscape with no luck. I can't get DNS lookup to work.
>
>Is this combination possible or will it not work because Trumpet is
>not a 32 bit application ?
>
>BTW the 16 bit version works just fine !
>
>Steve
>                                                               ~~~
>                                                              (o o)
> ----------------------------------------------------------ooO--U--Ooo-----
> Steven Stern           email: sterns@rahul.net     


It seems that the 32-bit version of Netscape cannot communicate 
with a 16-bit TCP/IP stack.  However, you don't need to use 
Trumpet anymore.  Just use SLiRP with the -P or ppp option (for 
Point-to-Point Protocol).  On the Windows 95 end, you'll need 
to go into Dial-Up Networking in My Computer and define dialer 
"objects" for each of the numbers you wish to call on your 
server.  The default protocol is PPP and is set under Server 
Type.  You'll then need to set up a dummy IP address in either 
Network under Control Panel or on the object itself, if your 
build of Windows 95 supports that (which I think 484 does).  
There are a few other things, such as Name Servers and 
Gateways, but since you've already set up Trumpet, you'll know 
what to put in there.  You'll want to specify that Windows 95 
bring up the terminal window after dialing so that you can 
enter your login information.  This can be done in Server Type 
as well.  Don't worry about the login name and password in the 
dialer object; it can't be resolved anyway and you'll connect 
just fine when you enter it in your terminal window.  After 
entering your user ID and password and finally the SLiRP 
command line, you simply press F7 (Continue) and you're all 
set.  All of your winsock apps will work, 32-bit and 16-bit.

If you have any trouble setting this up, let me know. Maybe I 
can help.  Just short on time at the moment.  
mailto:davidb@mordor.com
----------------------------------------------------------------------------
Question 5.3

whoa@netcom.com (arlene agcongay) wrote:
>
>hi, i just got SLiRP working for me the other day, but i have a
>question.  I'm using OS/2 Warp with SLIRP, and when i start it up,
>it tells me that my baud rate is 1200.  I would like to configure
>this part to a higher baud rate, but i don't know which file to
>edit.  What i've been doing is opening up another comm software like
>ZOC and have it initialize my modem to 38400.  but there has to be
>an easier way!  i'm a newbie to this, so please help me.. =)
>
>thanks in advance!!
>
>
>-arlene
>
>

slirp -b 38400  will tell SLiRP to send and receive data from 
your provider's modem at 38,400 bits per second.  To receive 
the data at the fastest possible rate, you'll need to call a 
number that supports the highest transmission rate possible 
with your modem and be sure you are connecting at that speed.  
What concerns me is that SLiRP defaults to 9600 "baud" and 
should not be reporting 1200 unless you have explicitly 
requested it with the -b switch. Maybe you are misreading one 
of the other parameters, such as MTU?

db

----------------------------------------------------------------------------
Qeustion 5.4

[ Editors' note: I screwed up the request below...so added the one line
  to get the context of the original question back.. Sorry 'bout that.]
>How does one get to a 
>unix shell using slirp.telnetd .. no one can answer this for me, it seems 
>and I haven't been able to find any documentation on the subject.. it's 
>rather frustrating. Thanks. E-Mail Please.
>
>--
> ______  
>( ____ \  rampage@ccnet.com	http://www.ccnet.com/~rampage	net-geek

	Simple, in your .slirprc you have a line such as is mine for tcsh:
		shell /usr/local/bin/tcsh
Then (if 10.0.2.0 is your SPECIAL address as it is for me) you telnet from your
local machine to 10.0.2.1 to get a 'shell' on your remote machine.  In my case
I put a lines in /etc/hosts such as:
		10.0.2.0 slirp
		10.0.2.1 remote
so that I can 'telnet remote' to get a shell or 'telnet slirp' to talk to
SLiRP's command line.

rdt
                                                   mailto:rdt@realm.net    
                                               or  mailto:rdt@kaiwan.com   
----------------------------------------------------------------------------
Question 5.5

On Sun, 25 Jun 1995 08:34:57 GMT Steven Stern (sterns@rahul.net) wrote in alt.dcom.slip-emulators:
: I'm running Win95 CSLIP with Slirp at the other end. After I start
: Slirp I get the following msg:

: SLiRP Ready ... (autodetect SLIP/CSLIP, MTU 552, 9600 baud)

: I'm using a 14.4 modem. Does the message above really says I'm only
: connected at 9600 ?

: Before Win95 Cslip, I always got 14.4 connections with Trumpet !

: Please help !

You need to specify the baud rate on the command you use to start slirp,
like: 
      slirp -b 14400 -c

Ahmad
--
Ahmad Al-Nusif            | E-Mail: morpheus@kuwait.net                      |
-----------------------------------------------------------------------------
Question 5.6

stew1117@netcom.com (stewart coulter) wrote:
>Hello, I am using Slirp version O, everything is running fine except the 
>news.  I have a netcom account and was told I need the file NNTPD, where 
>can I find this file and what type configuring do I have to do to the 
>slirp O program?  Please respond via email

>From a directory in your path (probably either your home directory or ~/bin), 
do

  ln -s ~seligman/bin/nntpd

Or, if you want your own copy (just in case), do

  cp -p ~seligman/bin/nntpd .

This version, written by Scott Seligman, supports XOVER. The TIA version will 
also work with either TIA or Slirp. Find it at

  ~barryn/pub/nntpd

These are on Netcom, of course, since they're only needed to emulate a normal 
NNTP server with Netcom's disk-based equivalent.

To use this with Slirp, add the following line to your .slirprc file:

  add exec nntpd 10.0.2.1:119

unless you use the TIA-style addresses, in which case you'd add

  add exec nntpd 192.0.2.3:119

Lee Dobbs                     Milpitas CA            Voice: 408-946-7860
ldobbs@netcom.com                 USA                Fax:   408-262-9392
-----------------------------------------------------------------------------
Question 5.7
D. Henry (marbling@apk.net) wrote:
: In article <3sj8cs$j3e@metz.une.edu.au>, jzhou1@metz.une.edu.au (JUN ZHOU) says:
: >
: >Hello,
: >
: >I am trying to run Netscape and Eudora on a PC with a modem. I have installed
: >the Trumpet winsock and can loging manually from TCPMAN widows. However, when 
: >I try to run the wisock applications, the Tcpman is lunched and minimized but
: >the Netscape windows never pop up.
: >
: >Any help is highly appreciated


He-he. I used to make the same mistake when I just installed Trumpet 
Winsock. Here's the catch. If you select 'Manual Login' option from the 
Trumpet Winsock's Dialler menu, SLIP is automatically disabled. After you 
manually log in and start your SLIP emulation, don't forget to press the 
'ESC' key. It will enable SLIP, and Trumpet Winsock will start talking 
to your SLIP emulator. If you don't do so, Netscape window will never pop 
up...
I hope this helps.

Regards,
Stan

----------------------------------------------------------------------------
Question 5.8

In article <3t278g$46r@newsbf02.news.aol.com>,
rmpshaker2@aol.com (RmpShaker2) wrote:
>Hey guys, When I setup my network settings, my only server type is PPP. I
>don't have a PPP connection, I have a slip.  I tried configuring the damn
>thing, but I found NO option for slip anywheres. I went through all the
>help and found jack.  Does anyone know how to setup a SLIP?
>
>Thanks, Chris

Unfortunately Win95 does not automatically set-up SLIP protocol, but it's 
quite easy.

Go into control panel, then add/remove software, then Windows Setup, the Have 
disk, now browse for a file named RNAPLUS.INF, it's on the cd, in think in 
admin\apptools\slip, and that's it.  Now when you set up server you should 
have cslip and slip options

----------------------------------------------------------------------------
Question 5.9
browe@netcom.com (Bill Rowe) wrote:
>In article <stevewDB8u3p.FIv@netcom.com>, stevew@netcom.com (Steve Wilson)
>wrote:
>>When you start up a shell, you tie-up a certain amount of memory
>>with local defines...like the path you use to search for commands,
>>any special "environment variables," etc.  If you fork off another
>>shell via telnetd, it will inherit this same environment...what
>>Lee is saying is that you probably just get a link to this stuff
>>instead of taking up X amount of more memory...
>
>Are you saying with telnetd the path to my home directory is not
>available? If it is available, how could it not be taking memory? If it
>isn't available, this seems to me a good reason not to use telnetd to
>access my shell account. 
>
>Usually, if I telnet to my shell it is because I want to manipulate one or
>more files there. Lack of access variables which are defined at login such
>as $PATH would seem to make it significantly more difficult to do the
>usual things with a shell account.

All the environment variables that were set by your login shell process 
*are* available to any subprocess. If the subprocess happens to be another 
shell, any reference to an unmodified environment variable just points back 
to the memory block attached to your login process. So, things like your 
path, term, prompt, shell, etc., don't have to be recopied -- they're 
already available.

The situation is different, however, when you start up a shell from an 
intermediate process like telnetd. telnetd doesn't pass the environment 
variables to the shell, so it starts up with just the default subshell 
parameters. You have to tell it to do something extra. If your shell is one 
of the csh derivatives, you need to tell it to execute your .login file in 
addition to the usual .cshrc file. One way to do this is 

  exec csh -l

which replaces the original telnet shell process with another one, but this 
time reading the .login file first. There are equivalents for the Bourne 
derivatives so that it executes your .profile first, but I don't remember 
what those are right now.

By the way, the shell variables are only part of the environment memory 
usage. There is some environment memory dedicated by your host to keep track 
of your login process and all your subprocesses. This includes space for:

 All the open files
 Access rights to files and processes
 The working directory
 The file creation mask
 Values of resource limits
 Signals to be ignored by the parent
 Signals not to be ignored by the parent

That's why it's still better for the host if you use a subshell through 
telnetd and then set your PATH, etc., than if you start a completely new 
login session.

Does this help? Are we having fun yet? :)

Lee Dobbs                     Milpitas CA            Voice: 408-946-7860
ldobbs@netcom.com                 USA                Fax:   408-262-9392
----------------------------------------------------------------------------
Question 5.10
wmcbrine@clark.net (William McBrine):
> FTP-PM never connects when I use it under SLiRP. Pretty much everything 
> else works fine, including FTP and NcFTP, except of course ping. What's 
> the problem, and is there a fix?

Well... You actually stated the problem yourself. Ping soesn't work,
and FTPPM uses PING. You can tell the IAK that PING is not available
by remarking the line starting with "icmp" in the file "protocol"
thats the fix).

/Jonas
Jonas Eckerman                    FSDB
jpe@algonet.se    www.algonet.se/~jpe/

----------------------------------------------------------------------------
Question 5.11

Editors' Note:  This question is slightly out of date.  Tia 2.0 is
available now...but the discussion is still relevant.

In article <DBDL0D.Ltu@dorsai.org>, Mike Russo <stardate@dorsai.org> wrote:
>At least, that's how I got TIA to work. I hope either TIA 2.0 or the 
>next SLiRP will support this protocol, along with PPP (and maybe automatic 
>port redirection? in my dreams?) =)

PPP is in TIA 2.0 (as is CSLIP).  It is working even as I type this,
but we've not released TIA 2.0 yet, so I can't say more at this time.

The others are tough nuts to crack, so let me address them one at a
time.

The ICMP protocol is simple and easily implemented.  However, there is
one minor problem (or major depending on who you are): root access.
ping must be run by root to work (or be setuid uid 0).  TIA or SLiRP
would need to be installed setuid, which violates one of the prime
assumptions that at least TIA has: No extra ordinary privs should be
required to use TIA.  So ICMP could be implemented for the link, but
not forwarded to other machines.  TIA 1.x doesn't choose to do this.
TIA 2.0 likely won't either.  Creative solutions to this problem may
be possible, but I've not had time to fully investigate my ideas, so
I'll not speculate on them just now.

Automatic port redirection is also hard.  When the TIA client[*] has a
program that wants to listen on a port, nothing happens over the wire.
Sure, buffer space gets allocated, the TCP stack's internal data
structures are setup, but no packets are sent over the link.  Since no
data flows accross the link, TIA (and SLiRP) have no way of knowing
that you desire to have a server or do port redirection.  Also, if TIA
or SLiRP were to try to do this, how could it inform you of the ports
that it chose for the servers you wish to run?  How would you know you
needed to connect to port 8456 to connect to your FTP server?  That's
why you need to tell TIA (and SLiRP) how to redirect the ports.

I wish I could have told you that TIA 2.0 solves all the hard problems
that exist in your dream product, but I can't because some of them are
very hard nuts to crack.

[*] A TIA client is the machine at the end of the point to point link
    that isn't running TIA.

Warner Losh		"VMS Forever"		home: imp@village.org
Cyberspace Development, Inc			work: imp@marketplace.com
----------------------------------------------------------------------------
Question 5.12

In article <3tqam6$lsv$1@mhafm.production.compuserve.com>, Jeff
Morganstern <102174.225@CompuServe.COM> wrote:

> Can someone explain to me why (from an annex type server) I can use 
> rlogin to my unix account and slirp works fine, but if I telnet 
> there, it does not?  I'm able to get into my (free but far away) 
> unix account through a local gopher server, but it can only telnet 
> there.  In order to use the rlogin protocol, I need to dial up 
> directly (expensive).  Is there any way around this?
> 
> Thanks.
> 
> Jeff

The reason is that rlogin is a much simpler program than telnet,
and is therefore more "transparent" in terms of not mucking about with
the characters that go through.

For SLiRP to work, you need a relatively "clean" 8-bit connection.
Telnet may do any or all of the following.

1. Strip out the eighth bit, leaving a 7-bit link.
2. Intercept certain characters, and translate them into telnet
   escape sequences.
3. Break the link if it receives certain characters.

That is not to say that it is impossible to get telnet to work.
Depending on the version of telnet you may be able to get an eightbit
link by either specifying it as an option (telnet -8), or by careful
settings on the machine you are telnetting from, for example,

stty -parenb                ; no parity, 8-bit characters
stty crtscts                ; hardware flow-control
stty -ixon                  ; no XON
stty -istrip                ; don't strip off eighth bit
                            ; what else?? mdmbuf?

You may also need to use PPP so that you can "escape" the characters
that would telnet would intercept.

There may be other things that need to be done.  I've been able to get
a connection established with slirp through a telnet link, but have not
gotten it to work satisfactorily, whereas rlogin works fine.  Your results
may differ.

---------------------------------------------------------------------
Question 5.13

In article <1995Jul13.110622@acad.drake.edu>, jms015@acad.drake.edu
(Pilfered Publishing TM) wrote:

> I login with ZTerm and quit without hanging up and then start InterSLIP
> on my Mac.  I load up telnet 2.6 and try the default as stated in the Home
> page "10.0.2.0".


I was never able to get the special "telnet 10.0.2.0" to work form my mac
using interslip, but it works using macppp.  At any rate, all the other
internet functions worked fine with both setups, although I highly
recommend macppp, as it is much faster.

-- 
Marshall Levin <levin@cobalt.middlebury.edu>


-------------------------------------------------------------------
Question 5.14

Daniel Ptacnik - BBMD/F94 (dptacnik@acs.ryerson.ca) wrote:
:
: I just got slirp to work properly. But I don't know what my pop mail (smtp)
: server is, is there a unix command that can tell you this info. Or 
: another other way of determining this. Any help is gladly appreciated. 
: Everthing else works fine like netscape, ftp, and irc. BTW I am using 
: slirp v.9o. Thanx again 
:

First, are you sure that your service provider supports POP at all? The 
POP server would have to run on the same machine as your mailbox in order 
to work (not quite true, it could run on a machine that NFS mounts your 
mailboxes too). Since your email address is: dptacnik@acs.ryerson.ca
you would find out where your mail is delivered by looking for the DNS MX 
record for that address: dig acs.ryerson.ca mx

	;; ANSWERS:
	acs.ryerson.ca. 843     MX      10 hopper.acs.ryerson.ca.

Next, find out if there is a POP server running on this host by telneting 
to port 110 (POP3) or port 109 (POP2) and see what you get:

	telnet hopper.acs.ryerson.ca 110
	Trying 141.117.101.8...
	Connected to hopper.acs.ryerson.ca.
	Escape character is '^]'.
	+OK hopper.acs.ryerson.ca POP3 3.3(18) w/IMAP2 client (Comments to 
	MRC@CAC.Washington.EDU) at Thu, 13 Jul 1995 15:10:16 -0400 (EDT)

You're in luck, your MX host has a POP3 server running (looks like the 
POP server that comes with Pine, since it mentions IMAP too). Close this 
connection by pressing control-backbracket and entering "close" at the 
telnet prompt, don't just break the connection, it isn't nice.

Now you are ready to enter this information into your POP client:

	POP host: hopper.acs.ryerson.ca
	SMTP host: hopper.acs.ryerson.ca

Have fun.

--
| John Lucas                          jlucas@uvi.edu                 |