rack-tor-tag

A rack middleware to tag accesses to your rails application from TOR nodes.

Based on [https://github.com/Gild/rack-tor-block]

Gemfile:

gem 'rack-tor-tag'

config/appplication.rb:

config.middleware.insert_after ActionDispatch::RemoteIp, Rack::TorTag
# or set config params
config.middleware.insert_after ActionDispatch::RemoteIp, Rack::TorTag, :host_ips => %w(1.2.3.4 1.2.3.5), :dnsel => 'my-dnsel-instance.myhost.org', :hostport => '123'

By default, :host_ips will be gotten by DNS lookup on HTTP_HOST, so if you know your IPs it's more efficient to specify. :host_port should probably be left blank, in which case it'll be gotten from SERVER_PORT.

:dnsel is if you're running your own instance of the Tor DNS Exit List software.

Tor users will all have env['action_dispatch.remote_ip'] = '127.0.0.2'. The actual source IP is at env['tor_ip'] — though practically all Tor IPs should probably be treated the same, since there's no easy way to know whether two different Tor exit node IPs represent the same originating user or not.

env['tor'] will be true for Tor users, false for non-Tor users, and nil if the lookup failed.

[ ] Get the bulk list rather than doing DNS lookups [ ] Cache results [ ] Local-cache dns lookups

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