Access Error After Configure Port Mapping(DNAT) For A Specific IP

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Issue Description

Configure port mapping only for a specific IP to access, but now all the IP is able to access.

Handling Process

1.Check whether the port mapping configuration is configured at the front, policy checked, the internal server with IP1.

2.Try to access with public IP. After that we capture packet for analysis and find out it matching with other port mapping accesses.

3.The port mapping is follow the top to bottom matching rule, it will continue to match the following rules if the first rule is unmatched.

Root Cause

The configuration has no issue, but the coming traffic match with other port mapping to gain access.

Solution

Ensure it match with the correct port mapping policy.



Faisal Lv8Posted 25 Aug 2020 08:17
  
Thank you very much for the information ...
Faisal Lv8Posted 17 Oct 2020 10:34
  
Nice article ...
Faisal Lv8Posted 22 Dec 2020 07:19
  
Great info ...
Ellechar Lv4Posted 19 Jan 2021 09:33
  
Very nice infoooooooooooooooooooooooooooooo
Faisal Lv8Posted 24 Mar 2021 08:07
  
Very informative …
Faisal Lv8Posted 09 Jun 2021 08:10
  
Nice guidance ...

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Doc ID: 2539
Author: LamWeiSiang
Updated: 2019-12-21 12:47
Version: