How to block spam that would be sent out from our source IP?

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Jun 23rd, 2009
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I would like to filter spam not to be sent from GPRS users that use our source IP addresses to Internet. I am using Cisco router 2821 as GPRS gateway and router 7206 as our Internet gateway. Does anyone know how to filter spam outgoing from source IP? I would be appreciate for help.



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mmacdonald70 Mon, 06/29/2009 - 14:42
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Why not just use an access-list to block outgoing port 25?


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