It seems I am also having speed issues as well with lan to wan traffic. Lan to Lan I am getting gigabit, from the Espressobin OS console outbound I am getting gigabit, but from a machine plugged into the lan to a machine hooked directly into the wan port I am only getting about a 3rd of a gig. Have you tried a bandwidth test on your router with something capable of gigabit speeds? I am getting these speeds from stock installs of Arch and Armbian, with no mods and no FW…
I saw doron’s comment, I do not believe the issue is pppoe on mine, at least I am not seeing that in the logs. Any ideas?