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<TITLE>The Answer Guy 32:
The "Difficulty" is in Disabling the Services
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<H4>"Linux Gazette...<I>making Linux just a little more fun!</I>"
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<H4 align="center">By James T. Dennis,
<a href="mailto:answerguy@ssc.com">answerguy@ssc.com</a>
<BR>Starshine Technical Services, <A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
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<H3><img src="../gx/dennis/qbub.gif" alt="(?)"
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>The "Difficulty" is in Disabling the Services</H3>
<p><strong>From CARqb on 20 Aug 1998 </strong></p>
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<strong><P>How can I set my computer to act as a network server?
I'm running RedHat 5.0
Thanks in advance.
</p></strong>
<blockquote><img src="../gx/dennis/bbub.gif" height="28" width="50"
alt="(!)" border="0"
>Usually you don't have to do anything special to any Unix or Linux box
to enable a variety of network services. In fact it is far more common
for sysadmins to put their energy into <EM>disabling</EM> the large variety of
services that are enabled by default (as every service is a potential
security hole).
</blockquote>
<blockquote>Now that applies to services like HTTP (web servers), FTP, POP and IMAP
("post office procotol" and mail access protocols), telnet, rlogin/rsh,
and various others.
</blockquote>
<blockquote>If you specifically mean "network <EM>file</EM> server" then the
answer is a bit more involved. There are a number of filesharing protocols that
are supported by Linux. NFS is most commonly used between Unix
systems. Samba is common when you want to use Unix/Linux servers in
a Windows for Workgroups, Win '95, NT, OS/2 or LANMan/LANServer
network. In environments with plenty of Apple Macintosh clients the
natural choice would be '<tt>netatalk</tt>' ('net Appletalk). On a LAN with
DOS client systems, particularly with existing Novell Netware servers
the choice would probably to use the '<tt>mars-nwe</tt>' (Netware emulator).
</blockquote>
<blockquote>Hopefully in the near future we'll see increased support for TCFS
(a transparently cryptographic filesystem -- which is far more secure
than NFS, even NFS over SRA (secure RPC authentication) and for CODA
a new, enhanced version of AFS (the "Andrew filesystem" when it was
developed at Carnegie-Mellon University, later called DFS when it was
aquired? by Transarc -- which I gather is an IBM affiliate).
</blockquote>
<blockquote>Thoroughly retro Linux heads could even try the RFS (remote filesytem)
package (runix100.tar.gz???). RFS was a SysV network filesystem that
lost mindshare to Sun's NFS and is thus virtually unheard of today.
</blockquote>
<blockquote>It is basically possible to support many of these system concurrently
on a single Linux host. A truly ambitious (and sick) sysadmin might
try enabling them <EM>all</EM>.
</blockquote>
<blockquote>It should be obvious that the Linux philosphy is to support whatever
protocol the client wants. This is vastly preferable (from the IS
manager's point of view) to certain systems that try to dictate what
software must be installed on all clients as part of their server
licensing.
</blockquote>
<blockquote>I hope this all helps. To give a better answer I'd have to know
a lot more about which services you want to provide. Most of them
have FAQ's and HOWTO's at the LDP mirrors like:
<A HREF="http://www.linuxresources.com/LDP"
>http://www.linuxresources.com/LDP</A>
(which should be the first
stop shopping URL for every Linux user's questions --- followed
by Yahoo! and its Alta Vista database at
<A HREF="http://www.yahoo.com">http://www.yahoo.com</A>).
</blockquote>
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<H5 align="center"><a href="http://www.linuxgazette.com/ssc.copying.html"
>Copyright ©</a> 1998, James T. Dennis <BR>
Published in <I>Linux Gazette</I> Issue 32 September 1998</H5>
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