echotest.nse

Overview是Linux,FreeBSD,UNIX,Windows下的网络扫描和嗅探工 具包,其基本功能有三个,一是探测一组主机是否在线 其次是扫描 主机端口,嗅探所提供的网络服务 还可以推断主机

id = "Echo"

description = "Connects to the UDP echo service, sends a string, receives a string and if both\
strings are equal reports success."

author = "Diman Todorov <[e-mail]>"

license = "See nmaps COPYING for licence"

categories = {"demo"}

require "shortport"

portrule = shortport.port_or_service(7, "echo", "udp")

action = function(host, port)
	local echostr = "hello there"
	local socket = nmap.new_socket()
	socket:connect(host.ip, port.number, "udp")
	socket:send(echostr)
	local status, result = socket:receive_lines(1);
	socket:close()

	if (result == echostr) then
		return "UDP Echo: correct response"
	end

	return
end