topic Re: Port masking in General Topics

Port masking

damir_porobic — Fri, 22 Jun 2012 15:52:32 GMT

Hi Everybody,

Is there a way to implement port masking on a PA-200?

I have an application that comes from the internet on a different destination port than the default port and I need the PA to change this port back to default value.

Example:

Http requests come to the PA on the port 1234 and the PA forwards this request to the server on the inside network but the port has to be 80.

Is there a way to accomplish this?

Regards,

Damir

Re: Port masking

mharding — Fri, 22 Jun 2012 16:23:28 GMT

Sounds like a NAT policy. Just a change of the destination port in the rule.

Re: Port masking

damir_porobic — Fri, 22 Jun 2012 16:28:27 GMT

How to accomplish this?

I'm quite sure that I haven't seen such option so far.

Static NAT translation (port forwarding) is already implemented and it works, but only one the default destination port.

Re: Port masking

mharding — Fri, 22 Jun 2012 16:41:52 GMT

This should help: NAT Configuration

This common design is required when the site has a single public IP addressfor a number of services that are provided by different systems internally. This is also referred to as port forwarding or Virtual IP’s (VIP’s). Note that in this scenario the internal web server is running on port 8080 rather then on the traditional port 80.

So in the original packet tab, you define the service as the destination port the external users will be connecting to. In the translated packet tab, you check the destination address translation box, and define the destination IP and port.

So the original packet is 1.1.1.1:1234 and then you translate it to 172.16.1.1:80.

Re: Port masking

damir_porobic — Fri, 22 Jun 2012 17:05:43 GMT

Thank you, I'll try that and let you know if it works.