OS: RHEL 3 kernel: 2.4.21-47.ELsmp

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cat /etc/security/limits.conf

sunil hard maxlogins 1
-------------------------

cat /etc/pam.d/sshd

session required pam_limits.so
auth required pam_stack.so service=system-auth
auth required pam_nologin.so
account required pam_stack.so service=system-auth
password required pam_stack.so service=system-auth
session required pam_stack.so service=system-auth
session optional pam_console.so

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tail /var/log/messages

Apr 12 13:51:39 estel sshd(pam_unix)[7735]: session opened for user sunil by (uid=0)
Apr 12 13:51:47 estel sshd(pam_unix)[7781]: session opened for user sunil by (uid=0)
Apr 12 13:51:58 estel pam_limits[7827]: Too many logins (max 1) for sunil


now the user sunil should not be able to ssh only once. However, here he is able to create two ssh sessions. What are the things I need to do.

PS: When I use "sunil hard maxlogins 0". It works perfectly fine.means no login ....

Check out this link to the Red Hat Knowledgebase. There is only one difference, so I'm not sure if this will help at all.

What version of OpenSSH are you running?

even putting an " - " in place of " hard" does not make any difference..

openssh version is openssh-3.6.1p2-33.30.9

I asked about the version because while I was searching the Red Hat knowledgebase, I came upon the following FAQ.

http://kbase.redhat.com/faq/FAQ_45_3504.shtm

At the bottom, they say:
I would assume that this is the problem you are running into.