Force user to use ssh/prevent telnet access

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# 1  
Old 09-21-2009
Force user to use ssh/prevent telnet access

I have just set up a user on our system HP-Thru64. The user needs to be able to su to root after they login and this works fine. Users cannot login from root externally so you have to first connect as a user and then su. I am wondering is it possible for me to prevent the user from having telnet access over port 23 and force them to use port 22. Currently a user can login in using regular telnet and then su which I figure is dangerous, I would like them to have to use ssh (port 22).

Also is it possible to force a user to have ftp access only, actually I should say sftp.

Thanks in advance
# 2  
Old 09-21-2009
Easiest would be to turn off telnetd and ftpd. So all are forced to use the more secure ssh/scp/sftp.
# 3  
Old 09-21-2009
Thanks Zaxxon
Unfortunately I can't force that decision. Is it not possible what I am trying to do?

# 4  
Old 09-21-2009
Another option would be to enable public key authentication, give those users their key-pair, and a week later set their passwords to some random string, re-set every hour or so.
# 5  
Old 09-21-2009
Originally Posted by peragin
Thanks Zaxxon
Unfortunately I can't force that decision. Is it not possible what I am trying to do?

If you can't force that decision, it seems odd you'd be allowed to force the exact same one just by using completely different means...
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