# File lib/vegas/runner.rb, line 143
    def port_open?(check_url = nil)
      begin
        check_url ||= url
        options[:no_proxy] ? open(check_url, :proxy => nil) : open(check_url)
        false
      rescue Errno::ECONNREFUSED, Errno::EPERM, Errno::ETIMEDOUT
        true
      end
    end