Proxy UDP Traffic from IPv4 to IPv6 for WireGuard IPv6 Endpoints

$ go get github.com/m-motawea/udp6proxy
$ # Replace $GOPATH with ~/go if you didn't set it
$ cd $GOPATH/src/github.com/m-motawea/udp6proxy
$ go build
$ sudo cp upd6proxy /usr/bin/

Example configuration file

[Redis]
Address = "127.0.0.1"
Port = 6379
Password = ""
DB = 0
Prefix = ""
Update = 60

[[Endpoint]]
Name = "wg0"
RemoteAddress = "2604:a8:40:d0::1875:7102"
RemotePort = 23456
LocalPort = 12345
WireGuard = true

[[Endpoint]]
Name = "wg1"
RemoteAddress = "2704:b881:40:fe::1875:7002"
RemotePort = 23457
LocalPort = 12346
WireGuard = true

Then udp6proxy config.toml

Please notice if you are using low numbered port like 80 or 443 you can use sudo or setcap before running the binary.

sudo setcap CAP_NET_BIND_SERVICE=+eip udp6proxy

Also, You need to run the server on a dual stack machine.

define redis configuration which can be used to read endpoints configuration. Update is time in seconds before reloading the configuration from Redis.

define the proxy settings for an endpoint.

• Name: must be unique to avoid overwriting configuration. it used as redis key.
• RemoteAddress: IPv6 address you need to proxy to. (the endpoint IP of wireguard peer)
• RemotPort: Port of the destination machine. (the endpoint port of wireguard peer)
• LocalPort: The server will listen on this port and proxy traffic to the remote IPv6 node.
• WireGuard: If set to true, the server will drop non-wireguard traffic.

127.0.0.1:6379> keys *
1) "wg0"
2) "wg1"
127.0.0.1:6379> get wg0
"{\"Name\":\"wg0\",\"WireGuard\":true,\"RemoteAddress\":\"::1\",\"RemotePort\":23456,\"LocalPort\":12345}"