I am trying to prevent my ssh users from having more than one session open at once, my system is Ubuntu 11.10.
I thought the setting was in
/etc/security/limits.conf where I set the following:
betatest hard maxlogins 1
However, this has no effect and I can log in multiple times using user account name betatest from different machines.
sshd_config is using PAM and the login and sshd configs in
/etc/pam.d both have the setting:
session required pam_limits.so
If anyone knows how I can restrict the concurrent sessions on a per user basis I would really appreciate the help.