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Enable SSH for root over certain network connection of a server...is it possible?


 
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Special Forums Cybersecurity Enable SSH for root over certain network connection of a server...is it possible?
# 1  
Old 03-31-2009
Enable SSH for root over certain network connection of a server...is it possible?

Hi - I have a SUSE Enterprise Linux Server V9 that I have an issue with. Policy says that root connectivity via ssh needs to be disabled. So, to do that, I made the following change in the sshd_config section:

Code:
# Authentication:

#LoginGraceTime 2m
#PermitRootLogin yes
PermitRootLogin no
#StrictModes yes
#MaxAuthTries 6

The issue is that a utility that the vendor uses uses root to connect via ssh across the two servers in our configuration to collect logging and reporting information. when I disable root login in sshd_config, it breaks their utility. I asked why they would have it run as root and not as some privledged account...but I have not received an answer yet. In our configuration, we have 3 networks (2 are private networks and 1 is connectivity to the corporate network.) My question, is it possible to disable root Login via ssh for some network segments but not others?

Last edited by Don Cragun; 10-05-2016 at 08:32 PM.. Reason: Add CODE tags.
# 2  
Old 03-31-2009
Only by running separate sshds on all network interfaces.

The better way to do this is AllowRootLogin without-password or AllowRootLogin forced-commands-only, then generate a public/private keypair for the vendor and restrict what they can do with the "command" option in ~root/.ssh/authorized_keys.
# 3  
Old 03-31-2009
The best solution are usualy the simpler ones:
Have the vendor use a different id than root.
if not possible use ssh key as mentioned by geekosaur.
you can even restrict that key usage to the specific script that need to be run

-Laurent
# 4  
Old 03-31-2009
Oh, and another alternative is to give the vendor a non-root account and have them use sudo with restrictions in /etc/sudoers. The vendor might not be willing to play along with this, though.

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