Slow speed on VPN Server

Technical Support for Routers VPN, DNS, Leaks
1

Hi everyone,

I recently purchased a GL-MT600 / Flint 2 to use as a VPN server for accessing my home network and files remotely. Initially, I had it connected to my ISP's main router, and everything worked perfectly. The VPN speeds were quite good—about 300 Mbps on WireGuard and 150 Mbps on OpenVPN. My ISP provides a 300 Mbps up-and-down connection.

Since everything was working fine, I decided to simplify my setup by removing the ISP router and using the Flint 2 as my main router (too many devices were connected otherwise). However, after making this change, the VPN server speeds dropped significantly. Now, I’m getting a maximum of around 15 Mbps upload/download on WireGuard and just 3 Mbps on OpenVPN.

I've checked the configuration extensively, but I can’t pinpoint the issue. The only notable change I made was switching the default IP range from 192.168.8.1 to 192.168.1.1, which is now also the router’s IP.

Has anyone else experienced something similar, or does anyone have suggestions on what might be causing the slowdown?

Thanks in advance for your help!

2

My Flint2 is also slow. It worked fine the first day but after that I’m only getting 10mbps down

3

If bring the ISP router back, to restore the original topology, does the VPN client speed up to normal?

4

Hi guys, in my case seams to work fine now, the only thing i did was remove all the LAN cables in the router (thinking one of the devices might cause some “interference”) and restarted (not factory reset). Once i did this, the vpn started to work fine, at least i think so.
I have a 300 mb/s internet speed connection on the FLINT2. And on the phone were i do the test being connected to 5g network (were i do the test i normally get 40 ping / 370 download / 60 upload more or less). Connected to Wireguard i now get: 51 ping (sometime less and some a bit more) download 220 and upload 65. On OVPN i get: 50 ping / 190 download / 55 upload.

So in my opinion its working fine now.

I put back all the cables one by one and seams like its still stable and working fine.

Sorry for the messy reply, hope it helps.