Unable to putty using ssh at port 22

I installed linux on one of my system and assigned valid network ip to it.
I am able to connect to net properly.

But when I try to putty this system from another system using ssh at port 22 then it gives me connection timed out error.
When I ping the system it responds fine but still unable to ssh it.

What might be the issue and how to resolve it?

Is sshd installed and running on the new system?
Is it listening on port 22?
Check boot log files, and use netstat to find out.

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The issue is resolved as I disabled the remote firewall which was blocking the ssh. It was really frustrating as all was fine and even telnet was working but not ssh. Presently following the links yourlinuxguy.com/?p=468 and docs.oracle.com/cd/E20815_01/html/E20821/givag.html I have disabled complete firewall. But is there any way I can enable the firewall and ask firewall to allow ssh? I did not see any option for the same in firewall init and setup files.
FYI I am using SLES Linux.