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Router NAT IP block using Access List

Unanswered Question
Jan 30th, 2012
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Hi All


   Strange issue we have here. First time I've come across this.


   Question: Is it possible to use an access-list on a NAT IP address on a Cisco router? For example, say we have our internal mail server 192.168.1.5 and it's NATed to the outside on port 25 say to 222.1.1.5. Is there a way to apply an access list to this external IP so that only certain outside users can get to this server using port 25??


Thanks all!

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