I am using putty to connect the remote server RHEL.
When I tried to login, I got the putty black screen.

I was reading through my /var/log/messages, here is what I found.
=================
Feb 9 13:17:46 fr-dc1-oraapps-01 sshd[32093]: Server listening on :: port 22.
Feb 9 13:27:07 fr-dc1-oraapps-01 sshd[445]: Did not receive identification string from ::ffff:10.112.4.79
Feb 9 13:37:56 fr-dc1-oraapps-01 sshd[1319]: Did not receive identification string from ::ffff:10.112.4.79
Feb 9 13:41:35 fr-dc1-oraapps-01 sshd[1707]: Did not receive identification string from ::ffff:10.112.4.79
Feb 9 16:38:55 fr-dc1-oraapps-01 sshd[17582]: Did not receive identification string from ::ffff:10.112.4.81
Feb 9 16:58:25 fr-dc1-oraapps-01 sshd[19308]: Did not receive identification string from ::ffff:10.112.4.81
Feb 10 08:31:27 fr-dc1-oraapps-01 sshd[22794]: Did not receive identification string from ::ffff:10.112.5.33
Feb 10 08:40:00 fr-dc1-oraapps-01 sshd[1869]: Did not receive identification string from ::ffff:10.112.4.81
Feb 10 09:47:46 fr-dc1-oraapps-01 sshd[11966]: Did not receive identification string from ::ffff:10.112.4.81
Feb 10 09:48:09 fr-dc1-oraapps-01 sshd[11988]: Did not receive identification string from ::ffff:10.112.5.33
Feb 10 09:49:57 fr-dc1-oraapps-01 sshd[12140]: Did not receive identification string from ::ffff:10.112.5.33
=================

I am stuck, Please help me.
Thanks

I saw this:

http://serverfault.com/questions/559...rom-ip-in-logs

Does the same problem occur if your try to connect from a different network? Or the same network as the remote server? (if possible)

change the port no. of ssh from 22to some other port and give a try

have a look at this link might be useful

http://forums.powervps.com/showthread.php?t=1667