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Old 02-04-2011, 11:55 AM   #1
axel_2078
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Registered: Jun 2010
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problem connecting to Solaris 10 from putty


Yesterday, I installed Solaris 10 on one of our SunBlade workstations (previously had Solaris 9 on it). I got everything working fine and I was able to connect to it via putty from my workstation. Once it was up and running, I installed the 10_Recommended patch cluster and left it run overnight. When I got in this morning, it was finished, so I rebooted it. Now, I can't connect to it anymore via Putty. Every time I try, I immediately get "server unexpectedly closed remote connection". However, if I log into another server through putty first, I can then ssh into this system without a problem. When I do a ps -ef | grep sshd, I can see a couple processes running. What's gives? The network configuration is exactly the same as it was before.

Edit: After researching the error message in /var/log/messages, I noticed it gave an error about encryption ciphers. Some googling on the error message led me straight to the fix. Apparently Solaris 10 was depending on strong encryption ciphers for SSH connections that were dependent on packages not installed. I found a work around for this. Just add this line to the bottom of your ssh_config and sshd_config files to allow the system to bypass the cipher dependency:

Ciphers aes128-ctr,aes128-cbc,arcfour,3des-cbc,blowfish-cbc

You'll have to restart sshd to reflect the change though. (svcadm restart ssh)

Last edited by axel_2078; 02-04-2011 at 01:09 PM. Reason: found fix
 
Old 02-04-2011, 01:57 PM   #2
repo
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Thank you for providing the solution.

Kind regards
 
  


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