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Mapping an internal to an external IP address

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jrcanfer

MIS
Aug 11, 2002
34
GB
Forgive my lack of knowledge but I've just come from a company using a Cisco PIX to a company using ISA.....

I can't work out how our ISP gets SMTP mail to our mail server through the firewall. On the PIX you'd setup a static conduit, basically creating a tunnel through the firewall using an external IP address. This tunnel would be configured only to accept SMTP packets from the ISP and route them only to the mail server....how does ISA cope with this?

Thanks

JC
 
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