how can i limit that user1 and user2 can't telnet to a hp server?

[常有慈悲心]

user1 and user2 is the hp server's common user,
i don't want them to use telnet.
how can i limit them?

[Mark Grant · Accepted solution]

If you don't want them to be able to telnet but you want other people to be able to telnet try the following.

Create a group that everybody is in except user1 and user2 and then change the group of /usr/bin/telnet and set the permissions so that only owner and group can execute telnet i.e chmod 550 /usr/bin/telnet

[常有慈悲心]

i know ,thank you.

[T G Manikandan]

you can just add a line "exit" in the user's .profile file.He will not be able to login.

if he is using csh then you can add "logout" in the .cshrc file.


Thanks

[Karthik S S]

Add this to /etc/profile


#Do not allow telnet sessions for user1 and user2

user=`whoami`

if [ $user = user1 ]
then
exit
else
if [ $user = user2 ]
then
exit
fi
fi

-Karthik S S

[Naveej.K.A]

change the shell of both users to /usr/bin/false.

usermod -s /usr/bin/false user1
usermod -s /usr/bin/false user2

They wont' be able to telnet

regds
Naveej

[Mark Grant]

I might be wrong here but I got the impression that the poster wanted to stop the users telnetting out of the machine, not into it.

[SANTOSH S. MHASKAR]

Just add alias in .profiles of users user1 and user2 as follows

alias telnet='echo Telnet not allowed!'

Now user1 or user2 will not able to use telnet.


-Santosh

[Mark Grant]

Nice idea Santosh

However, how would you stop people running "/usr/bin/telnet" or "./telnet" or "../telnet" or "../../bin/telnet" etc etc.