# File lib/action_dispatch/middleware/remote_ip.rb, line 18
    def initialize(app, check_ip_spoofing = true, custom_proxies = nil)
      @app = app
      @check_ip = check_ip_spoofing
      if custom_proxies
        custom_regexp = Regexp.new(custom_proxies)
        @proxies = Regexp.union(TRUSTED_PROXIES, custom_regexp)
      else
        @proxies = TRUSTED_PROXIES
      end
    end