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Re: restricting telnet via username
From: "Gabriel Orozco" <gabriel_orozco () mx sumida com>
Date: Mon, 1 Mar 2004 18:44:35 -0600

I think it's more or less simple:

for telnet / ssh, you only need to put a valid shell in /etc/passwd to
enable telnet. if you want to disable it, put /bin/false or an invalid shell
(the first it's my regular choice. do not forget to add /bin/false to
/etc/shells if you do not have it already there)

Gabriel Orozco
Sysadmin
SAM/IT

----- Original Message -----
From: "Gregory Dunlap" <gtdunlap () midsouth rr com>
To: "security-basics" <security-basics () securityfocus com>
Sent: Friday, February 27, 2004 10:55 PM
Subject: restricting telnet via username


Hello all,
  I'm attempting to restrict a telnet session of a group of users who
need to run one application on a server.  They login via telnet and that
is the only option at the moment.  They need to run a shell script and
then that will launch the app.  I've set the shell for these users to
the shell script so they won't have access to anything but this app.  I
would like to restrict the telnet daemon further to allow only certain
user names so they can't do a brute force attack.  In sshd_config I've
aways used allowd users setting but I don't see that in the hpux telnet
config.  Any help would be greatly appreciated.

Thanks,
Greg


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