# README

Bridge

Bridge is a TCP proxy tool Support http(s)-connect socks4/4a/5/5h ssh proxycommand

Supported protocols

Example

Mapping example.org:80 TCP port to 8080 port of the local machines.

bridge -b :8080 -p example.org:80
# `curl -H 'Host: example.org' 127.0.0.1:8080` will return to the target page

Proxy that can go through various protocols.

bridge -b :8080 -p example.org:80 -p ssh://username:password@my_server:22
bridge -b :8080 -p example.org:80 -p ssh://username@my_server:22?identity_file=~/.ssh/id_rsa
bridge -b :8080 -p example.org:80 -p socks5://username:password@my_server:1080
bridge -b :8080 -p example.org:80 -p http://username:password@my_server:8080
bridge -b :8080 -p example.org:80 -p 'cmd:nc %h %p'
bridge -b :8080 -p example.org:80 -p 'cmd:ssh sshserver nc %h %p'

It can also go through multi-level proxy.

bridge -b :8080 -p example.org:80 -p http://username:password@my_server2:8080 -p http://username:password@my_server1:8080

Using proxy protocol(http/socks4/socks5) instead of direct TCP forwarding.

bridge -b :8080 -p -
bridge -b :8080 -p - -p http://username:password@my_server1:8080
# `http_proxy=http://127.0.0.1:8080 curl example.org` Will be the proxy

You can also use ssh to listen for port mapping from local port to server port,
due to the limitation of sshd, only 127.0.0.1 ports can be monitored.
if you want to provide external services,
you need to change the 'GatewayPorts no' in /etc/ssh/sshd_config to yes
and then reload sshd.

bridge -b :8080 -b ssh://username:password@my_server:22 -p 127.0.0.1:80

More of the time I'm acting as a ssh proxy.

# in ~/.ssh/config
ProxyCommand bridge -p %h:%p -p "ssh://username@my_server?identity_file=~/.ssh/id_rsa"

Usage

Usage: bridge [-d] \
	[-b=[[tcp://]bind_address]:bind_port \
	[-b=ssh://bridge_bind_address:bridge_bind_port [-b=(socks4://|socks4a://|socks5://|socks5h://|https://|http://|ssh://|cmd:)bridge_bind_address:bridge_bind_port ...]]] \ // 
	-p=([tcp://]proxy_address:proxy_port|-) \
	[-p=(socks4://|socks4a://|socks5://|socks5h://|https://|http://|ssh://|cmd:)bridge_proxy_address:bridge_proxy_port ...]
  -b, --bind strings    The first is the listening address, and then the proxy through which the listening address passes.
                        If it is not filled in, it is redirected to the pipeline.
                        only SSH and local support listening, so the last proxy must be ssh.
  -d, --debug           Output the communication data.
  -p, --proxy strings   The first is the dial-up address, followed by the proxy through which the dial-up address passes.

Installation

go install github.com/wzshiming/bridge/cmd/bridge@latest

or

Download releases

or

Image