@krafg I'm having the same issue: ~20Mbps over Zerotier & HAP ac3 If I turn off Zerotier and just NAT out, then I get ~200Mbps. And if I enable Zerotier on my Windows desktop, through the same HAP ac3, then I get ~100Mbps > The cpu load of hap ac3, when transfering files is 20-30%, avg 25%, but ...