@JujustuPC Hi, Is there a specific reason why you don't want to install the driver you mentioned by running the included "Setup.exe"?

@Shihab8122 Hi, Here is the link you are looking for https://www.tp-link.com/en/support/download/archer-c64/#Firmware .

@Taadaahh If you need a router that can work as VPN Client, then yes, you need to buy another router that has this feature.

@Taadaahh Hi, There is a pre-release firmware available for the Archer C80 V2.20 that adds L2TP/IPSec VPN Server functionality. Would that help you in any way?...

@Hikky Ok. Now it's apparent what the problem is. The TL-WR840N is acting as (another) DHCP server and messes everything up. Normally, when choosing "Smart IP(DHCP)" the range extender should be...

@Blzart Hi, It's National Day holidays week in China. So you might have to wait a few more days for an answer.