Problem with interzone U turn NAT

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Announcements
Please sign in to see details of an important advisory in our Customer Advisories area.

Problem with interzone U turn NAT

L2 Linker

Hello,

I followed the instructions in the paloalto "understanding NAT-4.1RevC" pdf for implementing U turn NAT.

It works when I try to access a server in the DMZ from the trusted zone via it's public untrusted IP.

I have now a web server which somehow tries to do a http connect to it's own URL, which describes Case 5 in this document "server in the same zone as the client"

I followed the instructions:

NAT rule: DMZ-Zone to Untrust Zone with destination public IP translated to private IP and source translated to untrusted Interface and IP. I even created a security policy although the document says it is not needed as the traffic is in the same zone.

The problem is that I can't get it working the connection always times out, the same when I try to access the Public IP from an other server in the DMZ. I worked around the problem by setting up a DNS in the DMZ which points the URL to the servers private IP.

I can't see any traffic in the traffic logs which is probably due to the inter zone traffic.

Has anyone an idea why this isn't working?

Thanks

1 accepted solution

Accepted Solutions

L6 Presenter

Hi...Please try changing the source NAT from 'untrusted Interface and IP' to the interface and IP of the DMZ-zone.  Thanks.

View solution in original post

2 REPLIES 2

L6 Presenter

Hi...Please try changing the source NAT from 'untrusted Interface and IP' to the interface and IP of the DMZ-zone.  Thanks.

Thank you, this solved the problem.

I had some strange glitch that the nat rule wouldn't accept to IP of the interface, it always reset to "none". I had to delete the rule and recreate it, after that I had to move the NAT rule up as it was shadowed by an other rule. It then finally worked.

  • 1 accepted solution
  • 2507 Views
  • 2 replies
  • 0 Likes
Like what you see?

Show your appreciation!

Click Like if a post is helpful to you or if you just want to show your support.

Click Accept as Solution to acknowledge that the answer to your question has been provided.

The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!

These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!

The LIVEcommunity thanks you for your participation!