On 11/16/2012 10:07 AM, Noah Mehl wrote:
> Todd,
>
> The private subnet is: 172.16.0.0 - 172.31.255.255.  That IP is a public IP 
> address, which is part of AOL in Nevada I think.  I actually have over 80 
> different public IP address entries in my log using that user to SSH to my 
> SipXecs box.
>
> I understand that it's a phone system and not a firewall.  However it's a 
> linux server, and IPtables is the best firewall in world, IMHO.  I did have 
> SSH access open to the world, that was my choice.  I have never been bitten 
> by this before.  Either way, you should not be able to execute anything by 
> SSH'ing with the PlcmSpIp user, whether it's a public IP or not.
>
>
I would recommend all your ssh servers have sshd_config with at least:
AllowUsers user1name,user2name
PermitRootLogin no

I am also a big fan of fail2ban

-- 
Regards
--------------------------------------
Gerald Drouillard
Technology Architect
Drouillard & Associates, Inc.
http://www.Drouillard.biz

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