Flint 3 - WAN speed goes to 500mbit after enabling wireguard server

Router
1

Hi,
tl;dr after enabling wireguard server on Flint3 internet speed for all wireless/LAN users goes from 2Gbit to max 500Mbit.

Long: few weeks ago I upgraded Flint3 to newer firmware - 4.9.0. I hadn't checked my internet speed in a while, since it was usually 1.9 Gbit (my ISP provides 2 Gbit). Yesterday I noticed that my internet speed had dropped to 500 Mbit. A technician from my ISP came by and checked the connection - it was 2 Gbit. I performed a factory reset, and after that I also had 2 Gbit. I reconfigured the WireGuard server - and the speed dropped back to 500 Mbit.

Is this a known issue? How can improve LAN/Wireless clients speed without disabling wireguard server?

4

Hi

Yes, we are aware of this issue.

Currently, enabling the WireGuard Server incorrectly disables hardware acceleration, which may result in lower-than-expected WAN throughput. We have already planned a fix for the next firmware release.

For now, please SSH into the router and run the following commands as a workaround:

cat <<'EOF' >> /etc/hotplug.d/iface/99-ecm

# 4.9.0 workaround: force ECM re-enable after sync
# Restore LAN->WAN acceleration after WireGuard/ECM sync logic stops the IPv4 front end.
[ -e /sys/kernel/debug/ecm/gl_front_end_ipv4_stop ] && \
    echo 0 > /sys/kernel/debug/ecm/gl_front_end_ipv4_stop
EOF

# Apply it immediately without waiting for the next interface event
[ -e /sys/kernel/debug/ecm/gl_front_end_ipv4_stop ] && \
    echo 0 > /sys/kernel/debug/ecm/gl_front_end_ipv4_stop

# Optional: verify the current value, expected output is 0
cat /sys/kernel/debug/ecm/gl_front_end_ipv4_stop 2>/dev/null
5

Thank you for reply.

Do you know if that would be fixed in future release? In that case, I probably would wait for it.