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This is a general purpose TCP-to-TCP proxy implemented in Ruby using Nio4r.


Add this line to your application's Gemfile:

gem 'surro-gate'

And then execute:

$ bundle

Or install it yourself as:

$ gem install surro-gate


require 'surro-gate/proxy'

proxy =

# Create two TCP socket connections
left ='localhost', '3333')
right ='localhost', '2222')

# Push the sockets to the proxy
proxy.push(left, right)

# Wait for the communication to finish


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec 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


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