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vpieper/wireguard-over-tcp.md

Created February 25, 2021 11:54
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WireGuard over TCP with udptunnel
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wireguard-over-tcp.md

WireGuard over TCP with udptunnel

udptunnel is a small program which can tunnel UDP packets bi-directionally over a TCP connection. Its primary purpose (and original motivation) is to allow multi-media conferences to traverse a firewall which allows only outgoing TCP connections.

Server

# udptunnel -s 443 127.0.0.1/51820

Client

# udptunnel -c [SERVER PUBLIC IP]/443 127.0.0.1 50001
  • Remember to open TCP port 443 on the server's firewall
  • In the WireGuard client config file, replace the server's public IP (endpoint) with 127.0.0.1:50001
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kmille commented Nov 19, 2025

There are different version of udptunnel. The version that is packaged in Debian does not build on Arch Linux with current gcc.
AUR repo: https://aur.archlinux.org/packages/udptunnel-lennox

For me udp2raw worked. It's still maintained and easy to use. It's not packaged for Debian but there are built binaries on Github.

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