Hello all,
RMerlin, thank you for your excellent work!
I have a question about VPN speeds and I wonder if anyone else here had similar experience.
I did not find similar issue when searching the forum.
I am using RT-AC86U router with ExpessVPN subscription. While running firmware 384.18 and 384.19,
I am getting download speeds through OpenVPN client around 220 - 240 Mbps.
But when I update firmware to 386.1 and with same ExpressVPN config, I suddenly get only around
130 - 140 Mbps download speeds. Everything looks normal, everything works great, but I have this
VPN speed drop which I cannot explain.
If I disconnect the router from VPN, I get 250 Mbps, which is my maximum speed from ISP.
Just for reference, when on 386.1 and connected to VPN, the CPU cores are not maxed out while
I measure internet speed and CPU temperature is around 86°C and I don't think that CPU throttling is the
cause for VPN speed drop.
Also wiping the router and reapplying saved settings did not change the measured VPN speed.
Speedtest results remain 130 - 140 Mbps no matter if I test from wired or wireless client, Windows or iOS,
computer or mobile device.
If I go back to 384.19 firmware, I immediately get the 220 - 240 Mbps VPN speedtest results.
OpenVPN advanced parameters I use are copied from ExpressVPN website and are meant for Merlin firmware:
fast-io
remote-random
pull
tls-client
verify-x509-name Server name-prefix
ns-cert-type server
route-method exe
route-delay 2
tun-mtu 1500
fragment 1300
mssfix 1200
keysize 256
sndbuf 524288
rcvbuf 524288
Could this be caused by OpenVPN 2.5.0 used in firmware 386.1 in combination with ExpressVPN?
Can anyone suggest what else could I try to get to my usual VPN speeds on 386.1 firmware?
Thank you.
RMerlin, thank you for your excellent work!
I have a question about VPN speeds and I wonder if anyone else here had similar experience.
I did not find similar issue when searching the forum.
I am using RT-AC86U router with ExpessVPN subscription. While running firmware 384.18 and 384.19,
I am getting download speeds through OpenVPN client around 220 - 240 Mbps.
But when I update firmware to 386.1 and with same ExpressVPN config, I suddenly get only around
130 - 140 Mbps download speeds. Everything looks normal, everything works great, but I have this
VPN speed drop which I cannot explain.
If I disconnect the router from VPN, I get 250 Mbps, which is my maximum speed from ISP.
Just for reference, when on 386.1 and connected to VPN, the CPU cores are not maxed out while
I measure internet speed and CPU temperature is around 86°C and I don't think that CPU throttling is the
cause for VPN speed drop.
Also wiping the router and reapplying saved settings did not change the measured VPN speed.
Speedtest results remain 130 - 140 Mbps no matter if I test from wired or wireless client, Windows or iOS,
computer or mobile device.
If I go back to 384.19 firmware, I immediately get the 220 - 240 Mbps VPN speedtest results.
OpenVPN advanced parameters I use are copied from ExpressVPN website and are meant for Merlin firmware:
fast-io
remote-random
pull
tls-client
verify-x509-name Server name-prefix
ns-cert-type server
route-method exe
route-delay 2
tun-mtu 1500
fragment 1300
mssfix 1200
keysize 256
sndbuf 524288
rcvbuf 524288
Could this be caused by OpenVPN 2.5.0 used in firmware 386.1 in combination with ExpressVPN?
Can anyone suggest what else could I try to get to my usual VPN speeds on 386.1 firmware?
Thank you.