wireproxy

A wireguard client that exposes itself as a socks5/http proxy or tunnels.

What is this

wireproxy is a completely userspace application that connects to a wireguard peer, and exposes a socks5/http proxy or tunnels on the machine. This can be useful if you need to connect to certain sites via a wireguard peer, but can't be bothered to setup a new network interface for whatever reasons.

Why you might want this

You simply want to use wireguard as a way to proxy some traffic.
You don't want root permission just to change wireguard settings.

Currently, I'm running wireproxy connected to a wireguard server in another country, and configured my browser to use wireproxy for certain sites. It's pretty useful since wireproxy is completely isolated from my network interfaces, and I don't need root to configure anything.

Users who want something similar but for Amnezia VPN can use this fork of wireproxy by @artem-russkikh.

Feature

TCP static routing for client and server
SOCKS5/HTTP proxy (currently only CONNECT is supported)

TODO

UDP Support in SOCKS5
UDP static routing

Usage

./wireproxy [-c path to config]

usage: wireproxy [-h|--help] [-c|--config "<value>"] [-s|--silent]
                 [-d|--daemon] [-i|--info "<value>"] [-v|--version]
                 [-n|--configtest]

                 Userspace wireguard client for proxying

Arguments:

  -h  --help        Print help information
  -c  --config      Path of configuration file
                    Default paths: /etc/wireproxy/wireproxy.conf, $HOME/.config/wireproxy.conf
  -s  --silent      Silent mode
  -d  --daemon      Make wireproxy run in background
  -i  --info        Specify the address and port for exposing health status
  -v  --version     Print version
  -n  --configtest  Configtest mode. Only check the configuration file for
                    validity.

Build instruction

git clone https://github.com/octeep/wireproxy
cd wireproxy
make

Use with VPN

Instructions for using wireproxy with Firefox container tabs and auto-start on MacOS can be found here.

Sample config file

# The [Interface] and [Peer] configurations follow the same semantics and meaning
# of a wg-quick configuration. To understand what these fields mean, please refer to:
# https://wiki.archlinux.org/title/WireGuard#Persistent_configuration
# https://www.wireguard.com/#simple-network-interface
[Interface]
Address = 10.200.200.2/32 # The subnet should be /32 and /128 for IPv4 and v6 respectively
# MTU = 1420 (optional)
PrivateKey = uCTIK+56CPyCvwJxmU5dBfuyJvPuSXAq1FzHdnIxe1Q=
# PrivateKey = $MY_WIREGUARD_PRIVATE_KEY # Alternatively, reference environment variables
DNS = 10.200.200.1

[Peer]
PublicKey = QP+A67Z2UBrMgvNIdHv8gPel5URWNLS4B3ZQ2hQIZlg=
# PresharedKey = UItQuvLsyh50ucXHfjF0bbR4IIpVBd74lwKc8uIPXXs= (optional)
Endpoint = my.ddns.example.com:51820
# PersistentKeepalive = 25 (optional)

# TCPClientTunnel is a tunnel listening on your machine,
# and it forwards any TCP traffic received to the specified target via wireguard.
# Flow:
# <an app on your LAN> --> localhost:25565 --(wireguard)--> play.cubecraft.net:25565
[TCPClientTunnel]
BindAddress = 127.0.0.1:25565
Target = play.cubecraft.net:25565

# TCPServerTunnel is a tunnel listening on wireguard,
# and it forwards any TCP traffic received to the specified target via local network.
# Flow:
# <an app on your wireguard network> --(wireguard)--> 172.16.31.2:3422 --> localhost:25545
[TCPServerTunnel]
ListenPort = 3422
Target = localhost:25545

# STDIOTunnel is a tunnel connecting the standard input and output of the wireproxy
# process to the specified TCP target via wireguard.
# This is especially useful to use wireproxy as a ProxyCommand parameter in openssh
# For example:
#    ssh -o ProxyCommand='wireproxy -c myconfig.conf' ssh.myserver.net
# Flow:
# Piped command -->(wireguard)--> ssh.myserver.net:22
[STDIOTunnel]
Target = ssh.myserver.net:22

# Socks5 creates a socks5 proxy on your LAN, and all traffic would be routed via wireguard.
[Socks5]
BindAddress = 127.0.0.1:25344

# Socks5 authentication parameters, specifying username and password enables
# proxy authentication.
#Username = ...
# Avoid using spaces in the password field
#Password = ...

# http creates a http proxy on your LAN, and all traffic would be routed via wireguard.
[http]
BindAddress = 127.0.0.1:25345

# HTTP authentication parameters, specifying username and password enables
# proxy authentication.
#Username = ...
# Avoid using spaces in the password field
#Password = ...

Alternatively, if you already have a wireguard config, you can import it in the wireproxy config file like this:

WGConfig = <path to the wireguard config>

# Same semantics as above
[TCPClientTunnel]
...

[TCPServerTunnel]
...

[Socks5]
...

Having multiple peers is also supported. AllowedIPs would need to be specified such that wireproxy would know which peer to forward to.

[Interface]
Address = 10.254.254.40/32
PrivateKey = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=

[Peer]
Endpoint = 192.168.0.204:51820
PublicKey = YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY=
AllowedIPs = 10.254.254.100/32
PersistentKeepalive = 25

[Peer]
PublicKey = ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
AllowedIPs = 10.254.254.1/32, fdee:1337:c000:d00d::1/128
Endpoint = 172.16.0.185:44044
PersistentKeepalive = 25


[TCPServerTunnel]
ListenPort = 5000
Target = service-one.servicenet:5000

[TCPServerTunnel]
ListenPort = 5001
Target = service-two.servicenet:5001

[TCPServerTunnel]
ListenPort = 5080
Target = service-three.servicenet:80

Wireproxy can also allow peers to connect to it:

[Interface]
ListenPort = 5400
...

[Peer]
PublicKey = YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY=
AllowedIPs = 10.254.254.100/32
# Note there is no Endpoint defined here.

Health endpoint

Wireproxy supports exposing a health endpoint for monitoring purposes. The argument --info/-i specifies an address and port (e.g. localhost:9080), which exposes a HTTP server that provides health status metric of the server.

Currently two endpoints are implemented:

/metrics: Exposes information of the wireguard daemon, this provides the same information you would get with wg show. This shows an example of what the response would look like.

/readyz: This responds with a json which shows the last time a pong is received from an IP specified with CheckAlive. When CheckAlive is set, a ping is sent out to addresses in CheckAlive per CheckAliveInterval seconds (defaults to 5) via wireguard. If a pong has not been received from one of the addresses within the last CheckAliveInterval seconds (+2 seconds for some leeway to account for latency), then it would respond with a 503, otherwise a 200.

For example:

[Interface]
PrivateKey = censored
Address = 10.2.0.2/32
DNS = 10.2.0.1
CheckAlive = 1.1.1.1, 3.3.3.3
CheckAliveInterval = 3

[Peer]
PublicKey = censored
AllowedIPs = 0.0.0.0/0
Endpoint = 149.34.244.174:51820

[Socks5]
BindAddress = 127.0.0.1:25344

/readyz would respond with

< HTTP/1.1 503 Service Unavailable
< Date: Thu, 11 Apr 2024 00:54:59 GMT
< Content-Length: 35
< Content-Type: text/plain; charset=utf-8
<
{"1.1.1.1":1712796899,"3.3.3.3":0}

And for:

[Interface]
PrivateKey = censored
Address = 10.2.0.2/32
DNS = 10.2.0.1
CheckAlive = 1.1.1.1

/readyz would respond with

< HTTP/1.1 200 OK
< Date: Thu, 11 Apr 2024 00:56:21 GMT
< Content-Length: 23
< Content-Type: text/plain; charset=utf-8
<
{"1.1.1.1":1712796979}

If nothing is set for CheckAlive, an empty JSON object with 200 will be the response.

The peer which the ICMP ping packet is routed to depends on the AllowedIPs set for each peers.

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