This Article Applies to:

Archer C80_V1

 

Issue Description/Phenomenon:

There are cases that customers want to access a local L2TP/IPSec VPN server from an outside network, thus they will be required to open some specific ports on the gateway router, such as port 500, 4500 and 1701.

 

Typical network layout would be as follows:

 

However, customers will find they cannot open port 1701 on the Archer C80, it reports an error "Conflicting with existing port: 1701. To avoid conflict, please enter another value.". This is because that the 1701 port is reserved for the L2TP WAN connection on the Archer C80 with the current firmware, and you cannot open it for another server.

 

Available Solutions:

 

Step 1

We here provide a beta firmware for the Archer C80 to allow you to open the 1701 for another server, customers can install it on your C80, then try to open the port 1701 for the local L2TP/IPSec VPN server on the router.

 

Download link: 

Archer C80_V1_201201

 

Note:

1. Please be aware that there is no Onemesh implemented in this beta version, so DON'T install this version if you require to build an Onemesh system with some range extenders.

2. The router configuration will be restored to the factory defaults, you will need to reconfigure the router settings from scratch.

 

Step 2

After installing this beta firmware on the Archer C80, please disable the IPSec Passthrough on the router. You can find it under Advanced > Security > ALG page:

 

*This will be optimized in the new official release, please keep an eye on the Tether app or the official website for any new firmware in the future.

 

 

If you are looking for the instructions to open ports on the router, please check: Port forwarding: how to set up virtual server on TP-Link 11ac archer series wireless router.

 

If you failed to open other ports on the router, please check: Why port forwarding feature is not working on my router?