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def validate_port(server,port)
    ret_value = false
    begin
      addr = Socket.getaddrinfo(server,nil)
      socket = Socket.new(Socket.const_get(addr[0][0]), Socket::SOCK_STREAM, 0)
      secs = Integer(1)
      usecs = Integer(0)
      optval = [secs, usecs].pack("l_2")
      puts "optval: #{optval.inspect}"
      rc = socket.setsockopt(Socket::SOL_SOCKET, Socket::SO_RCVTIMEO, optval)
      puts "rc: #{rc}"
      rc =socket.setsockopt(Socket::SOL_SOCKET, Socket::SO_SNDTIMEO, optval)
      puts "rc: #{rc}"
      puts ">>> TCPSocket.connect"
      socket.connect(Socket.pack_sockaddr_in(port, addr[0][3]))
      puts "<<< TCPSocket.connect"
      ret_value = true
      socket.close
    rescue SocketError
      puts "SocketError (no host): #{$!.inspect}"
    rescue Errno::ECONNREFUSED
      puts "Connection refused (caught)"
    rescue Errno::ETIMEDOUT
      puts "Host not online (caught)"
    rescue
      puts "EXCEPTION: #{$!.inspect} class=#{$!.class}"
    end
    return ret_value
  end