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Old 06-07-2007, 03:50 PM   #1
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putty ssh login in Linux server

Hi Guys,

For some reasons I cannot loggin in ONE specific server (call it server # 1) via putty ssh using my IBM laptop running Windows XP. I am able to login using the same laptop into different server(call it server # 2) that is on the same network.

What is interesting I am able to ssh from server # 2 to server # 1.

Any suggestions?

Old 06-07-2007, 04:00 PM   #2
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Can you ping Server #1 from your IBM laptop?
Old 06-07-2007, 05:41 PM   #3
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Yes I can ping server # 1 from my laptop.

Old 06-08-2007, 12:14 AM   #4
Wim Sturkenboom
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Does putty connect (so you get a login prompt)? If not, check firewall rules on servers as well as hosts.allow/hosts.deny.
Old 06-08-2007, 01:02 AM   #5
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It's also possible that you aren't listed as a known user in Server #1. This depends on how you authenticate with the server. ( E.g. passwordless logins with your public key being listed in known_users)

Also check the /etc/ssh/sshd_config file for options that may deny you access. Perhaps it uses "AllowUsers" and you aren't listed.

The entries can have the form user@host, where "user" the local user on the server, and host is the remote host you are connecting from. If the host is different, or the hostname can't be resolved via DNS or /etc/hosts, you can be denied that way as well.

If you can log in directly to server 1, or indirectly via server 2, also read the logs (/var/logs/messages or /var/logs/security) for information on the login attempt.

Also, are you trying to login under your username or as root. It is common (and a good practice) to deny root login attempts.
Old 06-08-2007, 12:22 PM   #6
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Hi Guys,

The problem has been resolved by deleting the saved session in putty and creating a new one.

I guess nothing is perfect when you get a free tool like putty.

Thanks for your suggestions.



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