26 lines
712 B
Ruby
26 lines
712 B
Ruby
require 'rack/protection'
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module Rack
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module Protection
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##
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# Prevented attack:: IP spoofing
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# Supported browsers:: all
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# More infos:: http://blog.c22.cc/2011/04/22/surveymonkey-ip-spoofing/
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#
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# Detect (some) IP spoofing attacks.
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class IPSpoofing < Base
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default_reaction :deny
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def accepts?(env)
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return true unless env.include? 'HTTP_X_FORWARDED_FOR'
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ips = env['HTTP_X_FORWARDED_FOR'].split(',').map(&:strip)
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return false if env.include?('HTTP_CLIENT_IP') && (!ips.include? env['HTTP_CLIENT_IP'])
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return false if env.include?('HTTP_X_REAL_IP') && (!ips.include? env['HTTP_X_REAL_IP'])
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true
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end
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end
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end
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end
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