showsshversion.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 = "Stealth SSH version"

description = "Connects to an SSH server, queries the version string and echos it back. This tends to result\
in the scanning attempt not being logged by the ssh daemon on the target."

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

license = "See nmaps COPYING for licence"

categories = {"demo"}

require "shortport"

portrule = shortport.service("ssh")

action = function(host, port)
	local result, socket

	local catch = function()
		socket:close()
	end

	local try = nmap.new_try(catch)

	result = ""
	socket = nmap.new_socket()

	try(socket:connect(host.ip, port.number))

	result = try(socket:receive_lines(1));
	try(socket:send(result))
	try(socket:close())

	return "" .. string.gsub(result, "\n", "") 
end