Couldn’t end up getting this to work for Discord (everything else works). Turns out, my IPv4 traffic leaving through wlp3s0 has a MTU of 1460. And I measured a MTU of 1407 for traffic going through the AirVPN tun (implying 53 bytes of overhead, or 25 bytes of OpenVPN overhead). I ended up just saying the VPN overhead was 40 bytes. Here’s my napkin math:

1460 <- ISP MTU
- 28 cost of IP/UDP <- ISP MSS
- 40 cost of OpenVPN <- AirVPN MTU
1392
- 28 cost of IP/UDP <- AirVPN MSS
1364
- 40 cost of 2nd OpenVPN <- Home VPN MTU
1339
- 40 cost of IP/TCP
1299 <- Home VPN MSS

For Home and AirVPN I set those in the configs (tun-mtu and mssfix), then mirrored it on the client.

I assumed there was some overhead so I made the second VPN mtu much lower.

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I’ve got news for you, that’s slime not mint.

My dad did in 2011. Wikipedia says this is a popular model to Hackintosh.

I call them after what service is running on it. E.g. openvpn.