centos putty problem

[bunty82]

Hi, everyone i am trying to login by using putty into my server which is a centos server version 5.5(final). I am unable to login as i get a error of "server unexpectedly closed".

[Irithori]

That can mean, that sshd itself is up,
but your users shell cannot be started.

Do you maybe have a different user to try?
If not:
Connect to a out-of-band management console, if available.
If there is no such thing: use the local console.

[Rubberman]

So, are you using SSH protocols, or telnet protocols?

[bitonw]

with what userid do you try to login? bear in mind that root is disabled by default... (what is a good thing)
you can check the file /etc/ssh/sshd_conf
PermitRootLogin no

when looking at this file also check what protocol you are using;
Port 22
#Protocol 2,1
Protocol 2
in this example sshd uses only protocol 2 (more safe)

ssh default port 22
telnet default port 23

[tkb2766]

Hi, everyone i am trying to login by using putty into my server which is a centos server version 5.5(final). I am unable to login as i get a error of "server unexpectedly closed".

Are you using TCP Wrappers? Make sure that in the file /etc/hosts.allow (also /etc/hosts.deny) you are allowing sshd access from the IP Address you are coming in with! That has tripped me up a bunch of times.

ak.

[abdul raziq]

You can also check Iptable and SElinux.


Thanks

[Linuxmen]

Open the SSH port number(Default 22/TCP) towards the ssh client