Blocking Unwanted Domains

[DTMan]

Can anyone give some suggestions on how to block unwanted emails and all traffic associated with a domain name? I have a domain that is spamming me constantly and I don't want there to be any way this individual can use it for his gain. I have my Exchange Server currently blocking email from unknown domains, but I still get the annoying email failure notifications. I would like to block all of his activities at the router. I wish there was a way I could shut this business down or stop his emails.

Suggestions?

 

[thethmon]

Although no guarantee if the domain changes IP addresses, but I would determine his IP address or range and simply place an access-list on your router to drop traffic from there. You can drop all traffic or just SMTP traffic. Todd Hethmon
thethmon@hethmon.com

 

[KevinMcKloud]

Yup, just with an access-list:
If the Evil Domain is 66.66.66.66 255.255.255.0...

access-list 107 deny ip 66.66.66.66 0.255.255.255 any

* do not forget to permit all the rest that you need
* and to apply this as "ip access-group 107 in"
in your Internet Interface (maybe the Serial int)


Kev >=]
Cisco TAC