glider

glider is a forward proxy with multiple protocols support, and also a dns forwarding server with ipset management features(like dnsmasq).

we can set up local listeners as proxy servers, and forward requests to internet via forwarders.

                |Forwarder ----------------->|         
   Listener --> |                            | Internet
                |Forwarder --> Forwarder->...| 

Features

Listen(local proxy server):

• Socks5 proxy
• Http proxy
• SS proxy
• Linux transparent proxy(iptables redirect)
• TCP tunnel
• DNS Tunnel(udp2tcp)

Forward(upstream proxy server):

• Socks5 proxy
• Http proxy
• SS proxy

DNS Forwarding Server(udp2tcp):

• Listen on UDP and forward dns requests to remote dns server in TCP via forwarders
• Specify different upstream dns server based on destinations(in rule file)
• Tunnel mode: forward to a fixed upstream dns server
• Add resolved IPs to proxy rules
• Add resolved IPs to ipset

Ipset Management:

• Add ip/cidrs from rule files on startup
• Add resolved ips for domains from rule files by dns forwarding server

General:

• Http and socks5 on the same port
• Forward chain
• HA or RR strategy for multiple forwarders
• Periodical proxy checking
• Rule proxy based on destinations: Config Examples

TODO:

• UDP over TCP Tunnel (client <-udp-> uottun <-tcp-> ss <-udp-> target)
• Transparent UDP proxy (linux tproxy)
• TUN/TAP device support
• Code refactoring: support proxy registering so it can be pluggable
• Conditional compilation so we can abandon needless proxy type and get a smaller binary size
• IPv6 support
• SSH tunnel support

Install

Binary:

• https://github.com/nadoo/glider/releases

Go Get (requires Go 1.9+ ):

go get -u github.com/nadoo/glider

ArchLinux:

sudo pacman -S glider

Run

command line:

glider -listen :8443 -verbose

config file:

glider -config CONFIGPATH

command line with config file:

glider -config CONFIGPATH -listen :8080 -verbose

Usage

glider v0.3.1 usage:
  -checkduration int
        proxy check duration(seconds) (default 30)
  -checkwebsite string
        proxy check HTTP(NOT HTTPS) website address, format: HOST[:PORT], default port: 80 (default "www.apple.com")
  -config string
        config file path
  -forward value
        forward url, format: SCHEMA://[USER|METHOD:PASSWORD@][HOST]:PORT[,SCHEMA://[USER|METHOD:PASSWORD@][HOST]:PORT]
  -listen value
        listen url, format: SCHEMA://[USER|METHOD:PASSWORD@][HOST]:PORT
  -rulefile value
        rule file path
  -strategy string
        forward strategy, default: rr (default "rr")
  -verbose
        verbose mode

Available Schemas:
  mixed: serve as a http/socks5 proxy on the same port. (default)
  ss: ss proxy
  socks5: socks5 proxy
  http: http proxy
  redir: redirect proxy. (used on linux as a transparent proxy with iptables redirect rules)
  tcptun: a simple tcp tunnel
  dnstun: listen on udp port and forward all dns requests to remote dns server via forwarders(tcp)

Available schemas for different modes:
  listen: mixed ss socks5 http redir tcptun dnstun
  forward: ss socks5 http

Available methods for ss:
  AEAD_AES_128_GCM AEAD_AES_192_GCM AEAD_AES_256_GCM AEAD_CHACHA20_POLY1305 AES-128-CFB AES-128-CTR AES-192-CFB AES-192-CTR AES-256-CFB AES-256-CTR CHACHA20-IETF XCHACHA20
  NOTE: chacha20-ietf-poly1305 = AEAD_CHACHA20_POLY1305

Available forward strategies:
  rr: Round Robin mode
  ha: High Availability mode

Config file format(see `glider.conf.example` as an example):
  # COMMENT LINE
  KEY=VALUE
  KEY=VALUE
  # KEY equals to command line flag name: listen forward strategy...

Examples:
  glider -config glider.conf
    -run glider with specified config file.

  glider -config glider.conf -rulefile office.rule -rulefile home.rule
    -run glider with specified global config file and rule config files.

  glider -listen :8443
    -listen on :8443, serve as http/socks5 proxy on the same port.

  glider -listen ss://AEAD_CHACHA20_POLY1305:pass@:8443
    -listen on 0.0.0.0:8443 as a ss server.

  glider -listen socks5://:1080 -verbose
    -listen on :1080 as a socks5 proxy server, in verbose mode.

  glider -listen http://:8080 -forward socks5://127.0.0.1:1080
    -listen on :8080 as a http proxy server, forward all requests via socks5 server.

  glider -listen redir://:1081 -forward ss://method:[email protected]:8443
    -listen on :1081 as a transparent redirect server, forward all requests via remote ss server.

  glider -listen tcptun://:80=2.2.2.2:80 -forward ss://method:[email protected]:8443
    -listen on :80 and forward all requests to 2.2.2.2:80 via remote ss server.

  glider -listen socks5://:1080 -listen http://:8080 -forward ss://method:[email protected]:8443
    -listen on :1080 as socks5 server, :8080 as http proxy server, forward all requests via remote ss server.

  glider -listen redir://:1081 -listen dnstun://:53=8.8.8.8:53 -forward ss://method:pass@server1:port1,ss://method:pass@server2:port2
    -listen on :1081 as transparent redirect server, :53 as dns server, use forward chain: server1 -> server2.

  glider -listen socks5://:1080 -forward ss://method:pass@server1:port1 -forward ss://method:pass@server2:port2 -strategy rr
    -listen on :1080 as socks5 server, forward requests via server1 and server2 in roundrbin mode.

Advanced Usage

• ConfigFile
  • glider.conf.example
  • office.rule.example
• Examples
  • transparent proxy with dnsmasq
  • transparent proxy without dnsmasq

Service

• systemd: https://github.com/nadoo/glider/blob/master/systemd/

Links

• go-ss2: ss protocol support
• conflag: command line and config file parse support
• ArchLinux: a great linux distribution with glider pre-built package