Hi, I've setup OPNsense 24.7.2 as a router as described here https://docs.opnsense.org/manual/how-tos/wireguard-selective-routing.html (https://docs.opnsense.org/manual/how-tos/wireguard-selective-routing.html).
This works great for my linux machines once I've set the Interface MTU to 1420 on the ISC DHCP server.
My Macbooks are not picking up the change and I can't use the router without setting the MTU manually from 1500 to 1420.
I am sure that I've done something wrong, could someone please point me in a direction.
The wireguard instance and the LAN interface do not have a MTU set. I've tried unsuccessfully.
Instead of trying to change the MTU on the interfaces, try changing the MTU in the WireGuard instance configuration. (toggle 'advanced mode' to see the MTU setting). I have found that I need to set it to 1360 for my road warrior devices.
I've already tried to do that, I went as low as 1280.
I've started with a fresh install, I've tried normalisation, nothing helped besides setting the MTU on the client.
Hi previously i had 40-50Mb/s in upload with Wireguard with MTU 1372 in WG interface but it seems since update it's max 10Mb/s
What happened? is it the same for you?
Best regards
PS: i tried with MSS in lan but the same result
cf:
https://forum.opnsense.org/index.php?topic=21184.0
?