2024

2024-06-27 - wireguard mtu calculation

when the wireguard protocol is used the mtu size is reduced inside the tunnel. this can be a problem when your isp cut off your mtu size and you use large packets like the ssh handshake inside a wireguard connection. this results in a connection that sometimes work and sometimes not. to enable a stable connection within wireguard and to avoid isp-related problems, the mtu should be set to 1380 bytes.