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# Example ACL file
# authenticate is for client authentication to the proxy
authenticate:
# only clients connecting from these IPs are allowed
(client.ip_addr in split("127.0.0.1 192.168.1.7"))
# username begining (:=) with 'guest' are denied
and (client.username := "guest" ) = False
# check also the custom ACL called level_auth
and acl(level_auth)
# connections on work hours only
and (proxy.time >= "08:00" and proxy.time <= "19:00")
# on monday only (sunday is 0)
and proxy.dow = "1"
# after july, no connection allowed
and proxy.date < "2006-08-01"
# ACLs can be broken down into shareable subparts, call with acl(level_auth)
# this one is a custom ACL
level_auth:
# client has a custom tag named "level" which is an integer
int(client.level) >= 7
# admin is for administration access
admin:
# if the client tag "groups" contains the word "admin"
"admin" in split(client.groups)
authorize:
# localnet group members are allowed to connect to local network only
("localnet" in split(client.groups) and site.ip_address := "192.168.1.")
# or any user must pass the "enforce" ACL attached to sites
or acl(site.enforce)
# console_session is for the sshproxy console
console_session:
# allow admin group members only
"admin" in split(client.groups)
# shell_session controls normal ssh session
shell_session:
# only client username "david" can connect anywhere as root
site.login != "root" or client.username = "david"
# remote_exec controls remote command execution
remote_exec:
# deny root login
site.login != "root"
# allow only the uname command
and proxy.cmdline := "uname"
# ensure there is only one command
and not (";" in proxy.cmdline) and not ("&" in proxy.cmdline)
# ACLs can be given more than once,
# only one success is sufficient to allow access (OR relation)
remote_exec:
# only david is allowed to connect as root
site.login != "root" or client.username = "david"
# scp_upload is for file upload
# an ACL that is not declared is evaluated as False
#scp_upload:
# # allow scp upload for any login anywhere, or root inside /tmp only
# site.login != "root" or ( proxy.scp_path := "/tmp"
# and not ( ".." in proxy.scp_path ))
# scp_download is for file download
#scp_download:
# # allow scp download for any login but root
# site.login != "root"
# scp_transfer is for file upload AND download
# if the above rules failed, try the general rule
#scp_transfer: False
# options ######################################################
# opt_list_sites is to allow or deny the use of the --list-sites option:
# $ pssh --list-sites
opt_list_sites:
# guests group members can't see the list of allowed sites (they're blind)
client.group != "guests"
# opt_get_pkey controls the option --get-pkey of pssh:
# $ pssh --get-pkey root@host
opt_get_pkey:
# only admins can get the public key of a site login
"admin" in split(client.groups)
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