Minimal forward proxy using 150LOC and only standard libraries. Useful for development, testing, and learning.

$ forward-proxy --binding --port 3182 --threads 2
I, [2021-07-04T10:33:32.947653 #1790]  INFO -- : Listening
I, [2021-07-04T10:33:32.998298 #1790]  INFO -- : CONNECT HTTP/1.1


Add this line to your application's Gemfile:

gem 'forward-proxy'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install forward-proxy



Usage: forward-proxy [options]
    -p, --port=PORT                  Bind to specified port. Default: 9292
    -b, --binding=BINDING            Bind to the specified ip. Default:
    -t, --timeout=TIMEOUT            Specify the connection timeout in seconds. Default: 300
    -c, --threads=THREADS            Specify the number of client threads. Default: 128
    -h, --help                       Prints this help.


require 'forward_proxy'

proxy =
  bind_address: "",
  bind_port: 3000



After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.


The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the ForwardProxy project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.