MTU Finder

Find the optimal MTU value for your SSH or VPN tunnel connection.

MTU Finder & Calculator

Find the optimal MTU (Maximum Transmission Unit) for your tunnel. Wrong MTU causes slow speeds, disconnections, and packet loss.

MTU Quick Reference

1500Standard Ethernet/WiFi
1420-1440SSH WebSocket, VMess WS
1380-1400OpenVPN, WireGuard over 4G
1300-1350SSH over SlowDNS, L2TP
1200-1280Double tunnel, very restricted networks