Good day

I have a big problem with

https://www.tp-link.com/en/support/download/archer-c9/v1

Archer C9 v1

when I create the secondary connection -  VPN to my office connection speed was down from the 90mbit to 4.5mbit, strange I do all correct, but nothing helped even I reset all settings and update and downgrade firmware, speed is slow by VPN connection, I also test my connection with another device Tp-Link 841HP with this modem everything was ok and connection that I have 90mbit it's same. So what's the problem ?

can you help me to find the solution for this important issue?

thank you !

Support team:

Good day,

Actually I already switch off:

like QoS or Bandwidth control? Or firewall
but same problem, and I also have a new version of C9 and VR600 but there is no PPTP VPN included inside of system. Why in new version of firmwares doesn’t have any PPTP connection.

Me:

And how I can solve this problem with PPTP VPN connection in C9(v1)?

About my Network I have a LAN(WAN) ISP connection, so that’s it no any devices between that, I have also Tp-Link 841HP there is ok everything is working perfect !

And also, as I know in new model of C9 there is no VPN PPTP connection it's sad