Spamming and ssh attack from a customers

Mark Andrews marka at
Thu Jan 6 03:11:17 CST 2011

In message <BLU0-SMTP18666EADDBA40B2B455F798BB0A0 at phx.gbl>, Tarig Ahmed writes:
> hi all
> I am receiving emails from many servers saying that: this ip (from a  
> customer) is trying to attacking one of our servers.
> Is it appropriate to filter ssh, telnet, and smtp from my customers,  
> or just forward the message to my customer contact persons?

I suspect that your customer is compromised and you should put them
in a walled garden until they fix the problem.  Look at traffic
flows first however.

> Thanks in advance..
> Tarig Yassin Ahmed
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at

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