Transparent proxy servers for HTTP, HTTPS, DNS and TCP. This repository is heavily under development.
go-transproxy provides transparent proxy servers for HTTP, HTTPS, DNS and TCP with single binary. Nothing needs to setup many tools. Nothing needs to configure iptables. go-transproxy will start multiple proxy servers for these protocols. Futheremore, it will configure iptables automatically.
go-transproxy also provides two types of explicit proxy(not transparent proxy).
One is a simple proxy delegating to upstream your proxy, another is for adding Proxy-Authorization header automatically.
go-transproxy supports only Linux iptables.
Download from Releases page.
Use Go 1.13 for the build.
make
Usage:
transproxy [options]
Options:
-disable-iptables
Disable automatic iptables configuration
-dns-over-https-enabled
Use DNS-over-HTTPS service as public DNS
-dns-over-https-endpoint string
DNS-over-HTTPS endpoint URL (default "https://dns.google.com/resolve")
-dns-over-tcp-disabled
Disable DNS-over-TCP for querying to public DNS
-dns-proxy-listen [host]:port
DNS Proxy listen address, as [host]:port (default ":3131")
-dns-tcp
DNS Listen on TCP (default true)
-dns-udp
DNS Listen on UDP (default true)
-explicit-proxy-listen [host]:port
Explicit Proxy listen address for HTTP/HTTPS, as [host]:port Note: This proxy doesn't use authentication info of the `http_proxy` and `https_proxy` environment variables (default ":3132")
-explicit-proxy-only
Boot Explicit Proxies only
-explicit-proxy-with-auth-listen [host]:port
Explicit Proxy with auth listen address for HTTP/HTTPS, as [host]:port Note: This proxy uses authentication info of the `http_proxy` and `https_proxy` environment variables (default ":3133")
-http-proxy-listen [host]:port
HTTP Proxy listen address, as [host]:port (default ":3129")
-https-proxy-listen [host]:port
HTTPS Proxy listen address, as [host]:port (default ":3130")
-loglevel string
Log level, one of: debug, info, warn, error, fatal, panic (default "info")
-private-dns string
Private DNS address for no_proxy targets (IP[:port])
-public-dns string
Public DNS address (IP[:port]) Note: Your proxy needs to support CONNECT method to the Public DNS port, and the public DNS needs to support TCP
-tcp-proxy-dports port1,port2,...
TCP Proxy dports, as port1,port2,... (default "22")
-tcp-proxy-listen [host]:port
TCP Proxy listen address, as [host]:port (default ":3128")
Proxy configuration is used from standard environment variables, http_proxy, https_proxy and no_proxy.
Also you can use IP Address, CIDR, Suffix Domain Name in no_proxy.
# Set your proxy environment
export http_proxy=http://foo:bar@yourproxy.example.org:3128
# Set no_proxy if you need to access directly for internal
export no_proxy=example.org,192.168.0.0/24
# Start go-transproxy with admin privileges(sudo)
sudo -E transproxy -private-dns 192.168.0.100 -public-dns 8.8.8.8
For testing, using docker is easy way. Now, you can access to google from docker container with no proxy configuration as follows.
docker run --rm -it centos curl http://www.google.com
<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>302 Moved</TITLE></HEAD><BODY>
<H1>302 Moved</H1>
The document has moved
<A HREF="http://www.google.co.jp/?gfe_rd=cr&dcr=0&ei=GCKtWbD0AaLEXuTmr7gK">here</A>.
</BODY></HTML>
If your proxy doesn't support CONNECT method to DNS port, it cannot resolve public domain name transparently.
Fortunately, Google privides DNS-over-HTTPS service, so you can use this service as public DNS by adding -dns-over-https-enabled option instead of -public-dns option as below even if your proxy supports CONNECT method to 443 port only.
sudo -E transproxy -private-dns 192.168.0.100 -dns-over-https-enabled
If you can resolve all domains directly from local LAN, run command without dns related options as below. It disables DNS-Proxy.
sudo -E transproxy
If you need to use both public DNS and private DNS, and need to use public DNS directly, run command with -dns-over-tcp-disabled option as below.
It suppresses to insert a iptables OUTPUT rule for DNS over TCP.
sudo -E transproxy -private-dns 192.168.0.100 -public-dns 172.16.0.1 -dns-over-tcp-disabled
If you want to use an application which access to internet using port 5000, run command with -tcp-proxy-dports option as below.
sudo -E transproxy -private-dns 192.168.0.100 -public-dns 8.8.8.8 -tcp-proxy-dports 22,5000
- HTTP proxy: Only works with HTTP host header.
- HTTPS proxy:
no_proxyonly works with IP Address and CIDR if your https client doesn't support SNI. - TCP proxy:
no_proxyonly works with IP Address and CIDR.
Licensed under the MIT license.