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Unable to route port 80/443 through NAT/DMZ

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Unable to route port 80/443 through NAT/DMZ

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Unable to route port 80/443 through NAT/DMZ
Unable to route port 80/443 through NAT/DMZ
2022-11-21 15:01:05
Tags: #NAT #Firmware Update
Model: TL-ER5120  
Hardware Version: V3
Firmware Version: TL-ER5120(UN)_V3_20200313

Hello,

 

The latest firmware, TL-ER5120(UN)_V3_20200313, does not work with standard ports such as port 80 and port 443.

 

When NAT-DMZ is set, everything but standard ports are relayed.

 

Rolling back to TL-ER5120(UN)_V3_20180830 the problem cease to exists.

 

I wasted a lot of hours in diagnosticating this issue - and it could be a bit somewhere in the updated firmware I failed to see.

 

But rolling back to previous firmware fixes my issue - but I do have concerns about security.

 

Please, if at all possible, update your firmware or provide guidance to new functionality that block default ports by standard.

 

Thanks.

 

Best regards,


Michael

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Re:Unable to route port 80/443 through NAT/DMZ
2022-11-22 11:35:59

  @gimlichael 

 

Ports 80 and 443 should be open by default within the LAN, you can test it if you try to access it from the WAN side, it is still inaccessible, after all it is a NAT device.

Just striving to develop myself while helping others.
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Re:Unable to route port 80/443 through NAT/DMZ
2022-11-22 21:35:19

  @Virgo as I wrote; I did an intensive testing.


After updating from previous firmware, things started to fail (most services I run are 80/443).

Doing NAT from second router (which is where the DMZ NAT points to), I changed original routing point to my workstation.

Here I spun up a docker test image, exposing various ports.

All ports but 80/443 worked as expected.

 

After downgrading the firmware, I repeated the above mentioned.

 

Now everything works as expected - also on 80/443.

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