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New Member

Multiple port Mapping


I have one ip public, and I'm using PIX 515e, what I'm trying to do is multiple port mapping so I can publish multiple server which can be access from outside world in a single IP public, can I do that.

sorry 'cause a gave you all a weird case.



Cisco Employee

Re: Multiple port Mapping

You can map different outside ports through to the same or different inside servers, using the same port or different ports. What you can't do is map the same outside port to multiple inside servers.

But let's say you have an internal web server at, an internal mail server at and an internal FTP server at, you'd simly do this:

> static (inside,outside) tcp interface 80 80 netmask

> static (inside,outside) tcp interface 25 25 netmask

> static (inside,outside) tcp interface 21 21 netmask

Then create an access-list on the outside int that allows traffic in on those three protocols and you'll be set.

You can even change ports as tey go through like this:

> static (inside,outside) tcp interface 80 8080 netmask

But you can't have the following:

> static (inside,outside) tcp interface 80 80 netmask

> static (inside,outside) tcp interface 81 80 netmask

or even:

> static (inside,outside) tcp interface 80 80 netmask

> static (inside,outside) tcp interface 80 8080 netmask

cause then the same port is mapped through to two different ports, and the PIX won't know which one to translate it to.

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