Skip to content

A TLS reverse proxy with SNI multiplexing in Go

License

Notifications You must be signed in to change notification settings

tolgahanakgun/slt

 
 

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

16 Commits
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

slt is a dead-simple TLS reverse-proxy with SNI multiplexing (TLS virtual hosts).

That means you can send TLS/SSL connections for multiple different applications to the same port and forward them all to the appropriate backend hosts depending on the intended destination.

Features

SNI Multiplexing

slt multiplexes connections to a single TLS port by inspecting the name in the SNI extension field of each connection.

Simple YAML Configuration

You configure slt with a simple YAML configuration file:

bind_addr: ":443"

user: pi

frontends:
  v1.example.com:
    backends:
      -
        addr: ":4443"

  v2.example.com:
    backends:
      -
        addr: "192.168.0.2:443"
      -
        addr: "192.168.0.1:443"

Optional TLS Termination

Sometimes, you don't actually want to terminate the TLS traffic, you just want to forward it elsewhere. slt only terminates the TLS traffic if you specify a private key and certificate file like so:

frontends:
  v1.example.com:
    tls_key: /path/to/v1.example.com.key
    tls_crt: /path/to/v1.example.com.crt

Round robin load balancing among arbitrary backends

slt performs simple round-robin load balancing when more than one backend is available (other strategies will be available in the future):

frontends:
  v1.example.com:
    backends:
      -
        addr: ":8080"
      -
        addr: ":8081"

Running it

Running slt is also simple. It takes a single argument, the path to the configuration file:

./slt /path/to/config.yml

Building it

Just cd into the directory and "go build". It requires Go 1.1+.

Testing it

Just cd into the directory and "go test".

Stability

I run slt in production handling hundreds of thousands of connections daily.

License

Apache

About

A TLS reverse proxy with SNI multiplexing in Go

Resources

License

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published

Languages

  • Go 100.0%