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Re: SGI security problem with telnetd. TAKE IMMEDIATE ACTION!! (fwd)


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Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
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---------- Forwarded message ----------
Date: Tue, 15 Aug 2000 15:46:53 -0500 (CDT)
From: David B. Bukowski <address@hidden>
To: Pete Pokrandt <address@hidden>
     address@hidden
Subject: Re: SGI security problem with telnetd. TAKE IMMEDIATE ACTION!! (fwd)

But besides using telnet, too insecure, sniffers could pick up passwords as in 
telnet they are sent in plain text.  (I haven't played with the SSL version of 
telnet yet)  But a preferreed method which I am starting to enforce around here 
is use SSH (info on this product can be found at http://www.ssh.org/)
Then besides using TCP wrappers you could use some type of ipfiltering 
capabilities...
Linux supports IP chains in kernel version 2.2.16 and Sun I think has a 
ipfilter program or equivalent.  Not sure on that so don't take my word on it, 
but I am almost positive it does.
Windows computers heave a program that is a client to connect to ssh clients.  
Some of these are SecureCRT and another is teraterm.  

Just my 2 cents worth on security issues.
-dave
> 
> Of course, after doing that, you can no longer telnet into your
> machines, which is a hassle, but it's better than getting hacked
> into.  I personally run the telnet daemon, but use tcp wrappers
> to restrict what remote IPs can connect to it. It is not totally
> secure, but eliminates a good portion of the risk associated
> with the telnet daemon bug, without removing telnet access for
> legitimate users.
> 
> Anyways... Back to the inetd.conf's on my other 20+ SGIs...
> 
> Pete
> 
> --
> +>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+
> ^ Pete Pokrandt                    V 1447  AOSS Bldg  1225 W Dayton St^
> ^ Systems Programmer               V Madison,         WI     53706    ^
> ^                                  V      address@hidden       ^
> ^ Dept of Atmos & Oceanic Sciences V (608) 262-3086 (Phone/voicemail) ^
> ^ University of Wisconsin-Madison  V       262-0166 (Fax)             ^
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+
> 




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David B. Bukowski               |email (work):          address@hidden
Network Analyst                 |email (personal):      address@hidden
College of Dupage               |pager:                 (630) 266-7775
Glen Ellyn, Illinois            |work phone:            (630) 942-2591
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