Limit root user of SSH logins

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Operating Systems Linux Red Hat Limit root user of SSH logins
# 1  
Old 09-17-2013
RedHat Limit root user of SSH logins

Hi team,

I tried to modify the /etc/security/limits.conf file to limit the root user for more one login. I added the line in limits.conf file like:
@root            hard    maxlogins       1

I also tried to modify /etc/ssh/sshd_config to limit the root userlogin by adding this:

MaxSessions 2

But I do still able to login more than one time! Any help please..

Last edited by leo_ultra_leo; 09-17-2013 at 02:13 AM.. Reason: More details..
# 2  
Old 09-17-2013
Your limits.conf syntax is wrong. You are trying to limit a group named root, not a user named root. Change "@root" to "root"
# 3  
Old 09-17-2013
No I have this in limits.conf

I think that is no matter if I put @root since the root user is belong to root group. However, I removed the @ sign and made it like this
oot             hard    maxlogins       2

And I still able to login many times!
# 4  
Old 09-17-2013
This limit doesn't apply to a user whose userid is 0.
# 5  
Old 09-17-2013
Originally Posted by Scott
This limit doesn't apply to a user whose userid is 0.
! Then how can I restrict the user root of multi login?!!
# 6  
Old 09-17-2013
I have no idea why you'd want to do that.

There are various ways to restrict root access to varying degrees, but not by just the number of SSH logins (and even that would be easily circumventable with, for example, su).
# 7  
Old 09-17-2013
I want to make sure that I'm the only root user over SSH.

I didn't expect this issue is on that difficulty to be solved!
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