RE: Securing SSH

["Ethan King" <eking () odms xerox com>]

In addition to the other methods I'm sure will be suggested, I always like
to throw up SSH on a non-standard port and let the users know.  This won't
hide from a port scan, however if you turn off the Banner or change it to
hide the version, it adds a little extra protection..    just some
thoughts...

-Ethan



-----Original Message-----
From: Roland Venter [mailto:rolandv () xtra co nz]
Sent: Friday, January 09, 2004 6:54 PM
To: security-basics () securityfocus com
Subject: Securing SSH


I need to manage several servers remotely via SSH, I'm interested in ways to
secure the connection and prevent unauthorised access.

My thoughts:
Limit access to only allow remote connections from our management network
via iptables rules. Works but what if our ISP changes our fixed IP, which
means we are effectively locked out from all the servers and requires a site
visit to update the rules.

We also need to provide access to engineers working from home using dialup,
etc

Some sort of client certificates to supplement username and password,

Recommendations on securing the SSH daemon etc

Any ideas and tips or random thoughts appreciated

Cheers,
Roland






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course! All of our class sizes are guaranteed to be 10 students or less. 
We provide Ethical Hacking, Advanced Ethical Hacking, Intrusion Prevention, 
and many other technical hands on courses. 
Visit us at http://www.infosecinstitute.com/securityfocus to get $720 off 
any course!  
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