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Disable multiple ssh logins for an OS user in Solaris

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Old 06-13-2019
Disable multiple ssh logins for an OS user in Solaris

Hi folks,
I am fairly a beginner when it comes to Solaris OS administration, but part of my job somehow has scope to provide L1-level of OS administration over a few solaris servers.

Now, we have a requirement to limit the number of simultaneous ssh logins/sessions to the server, sort of similar to a windows server where an OS windows account can only be used one at a time, so if another colleague logged in to that same windows server, my current RDP session will be cut off.

Is there any way to do the same for a solaris server? My servers are on SunOS 5.11 11.3 sun4v sparc.

I've done some googling and I see the files "/etc/limits" and "/etc/security/limits.conf" being mentioned but I don't have those in my server.

Any input from the community will be very much appreciated.

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SSH-KEYSIGN(8)						    BSD System Manager's Manual 					    SSH-KEYSIGN(8)

ssh-keysign -- ssh helper program for host-based authentication SYNOPSIS
ssh-keysign DESCRIPTION
ssh-keysign is used by ssh(1) to access the local host keys and generate the digital signature required during host-based authentication with SSH protocol version 2. ssh-keysign is disabled by default and can only be enabled in the global client configuration file /etc/ssh/ssh_config by setting EnableSSHKeysign to ``yes''. ssh-keysign is not intended to be invoked by the user, but from ssh(1). See ssh(1) and sshd(8) for more information about host-based authen- tication. FILES
/etc/ssh/ssh_config Controls whether ssh-keysign is enabled. /etc/ssh/ssh_host_dsa_key, /etc/ssh/ssh_host_rsa_key These files contain the private parts of the host keys used to generate the digital signature. They should be owned by root, read- able only by root, and not accessible to others. Since they are readable only by root, ssh-keysign must be set-uid root if host- based authentication is used. SEE ALSO
ssh(1), ssh-keygen(1), ssh_config(5), sshd(8) HISTORY
ssh-keysign first appeared in OpenBSD 3.2. AUTHORS
Markus Friedl <> BSD
May 31, 2007 BSD

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