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# SPAroid
Single Packet Authorization client implementation in Ruby, both a library and a CLI app. SPA sends a single encrypted and HMACed UDP package to a server, the server upon receiving it verifies and decrypts it and then executes a command, most often opening the firewall for the client that sent the package. This allows you to employ a reject-all firewall but open the firewall for e.g. SSH access. It's a first line of defence, in the case of 0-day attacks on SSH or similar.
## Installation
Add this line to your application's Gemfile:
```ruby
gem 'sparoid'
```
And then execute:
$ bundle install
Or install it yourself as:
$ gem install sparoid
## Usage
...
Can be used with OpenSSH's ProxyCommand/ProxyUseFdpass to send the packet before connecting, open the TCP connection and that pass that connection back to the SSH client.
```
Host *.example.com
ProxyCommand sparoid send %h --passfd %p
ProxyUseFdpass yes
```
## Development
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 the created tag, and push the `.gem` file to [rubygems.org](https://rubygems.org).
## Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/84codes/sparoid.rb.
## License
The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
Version data entries
8 entries across 8 versions & 1 rubygems