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Thank you for the link to the guide, however i found that page already and gave it a try, it did not work (i 1st gave normal portforwarding a try before setting the whole PC to DMZ).

The device i want to enable DMZ for is a regular PC, i have a webserver running there (it is not a configuration issue on the PC as when i connect the datastick directly without router to it, the webserver is reachable from the internet; the firewall of the PC is configured properly).

Kevin_Z wrote

Hi,

 

What is the IP address and default gateway of this PC? Below is the instruction to find them:

https://www.tp-link.com/en/support/faq/838/ 

 

IP 192.168.0.2

Gateway 192.168.0.1

 

 

Meanwhile, in the same network, please test whether you can access it with your PC's IP address and port number;

yes, local and from lan works fine

 

 

meanwhile, you can use the WAN IP plus port number to test.

when i enter the WAN-IP into a browser it shows the webinterface of the router. this only works in the same network as the router

 

if i enter the WAN-IP from an external network there is no response

 

Besides, please use telnet to test:

1. in the same network, please go to run—cmd—telnet lan ip port number

works fine

2. in external network, please run—cmd—telnet wan ip port number

fails

Note: Please show us the pictures of the test results.

 

Good day. 

answers in red; added images

 

additional notes: portscanner showed router has beside webinterface on port 80 a listening service on port 22 (available only from LAN)

 

 

 

 

EDIT:

it seems this user has the same problem

https://community.tp-link.com/en/home/forum/topic/92070?page=1&t=2018%2F10%2F18%2003%3A49%3A20%20%2B0000

 

EDIT2:

this user aswell

TL-MR3420 v3 is not port forwarding

 

@Portforwardguy 

 

Hi,

 

i am using this router with doungle connected. Not able to configure the Port Forwarding. Below are the details. 

 

3G/4G Wireless N Router
Model No. TL-MR3420

Firmware Version:   3.15.9 Build 140912 Rel.35984n
Hardware Version:   MR3420 v3 00000000

 

 

Please help  me to configure the port forwarding and am using canyouseeme.org to check the open ports.    showing me as  Reason: Connection timed out

 

@Kevin_Z 

hi Kevin

i have a router TP-Link W3420 v2  :

and i have a IP Fixe  but th port forwarding is failed , i am very tired please help me thank you

Firmware Version:	3.16.9 Build 150319 Rel.60489n
Hardware Version:	MR3420 v2 00000000

@Kevin_Z hi Kevin i have a router TP-Link W3420 v2 : and i have a IP Fixe but th port forwarding is failed , i am very tired please help me thank you Firmware Version: 3.16.9 Build 150319 Rel.60489n Hardware Version: MR3420 v2 00000000