SSH Security

Alexey Fadyushin fab at s-tunnel.com
Thu Sep 30 17:01:45 UTC 2004


You should use option AllowUsers in file /etc/ssh/sshd_config. This option
lists the names of users which are allowed to connect via ssh and host 
from which them are allowed to connect.  For example:
AllowUsers: *@192.168.11.1
should allow any user to connect from host 192.168.11.1. Connections 
from other addresses willn ot succeed.

Also you can use files /etc/hosts.allow and/or /etc/hosts.deny which 
define restrictions for connections to daemons which use libwrap (SSH 
does use it).

It is also possible to filter incoming connections to port ssh with 
iptables, so the packets from any hosts not allowed to connect to SSH 
will be dropped.

Alexey Fadyushin.
Brainbench MVP for Linux
http://www.brainbench.com

Darryl W. DeLao Jr. wrote:
> How can I tell the SSH server to only allow certain IP's the ability to
> login?
> 
>  
> 
> Thanks!
> 
>  
> 
>  
> 




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