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windows批处理批量判断远程端口是否开放的简单粗糙办法

思路:1.把ping不通的排除以节省脚本运行时间,不考虑那些特殊情况

           2.记录telnet命令的执行时间,时间不超过2S的视为连接上,有点简单粗暴但暂时想不出更好的办法

脚本如下,只能用于不严谨的场合:

@echo off&setlocal ENABLEDELAYEDEXPANSION 

for /l %%i in (1,1,255) do  call :step %%i
echo 完毕!
pause


:step

	ping /n 1 223.95.165.%1  || goto :EOF

	
	set _time_start=!time!
	set /a second_start=!_time_start:~6,2!
	set /a minute_start=!_time_start:~3,2!
	set /a hour_start=!_time_start:~0,2!
	set /a second_start=!hour_start!*3600+!minute_start!*60+!second_start!
	echo q|telnet -e 'q' 223.95.165.%1 554

	set _time_end=!time!
	set /a second_end=!_time_end:~6,2!
	set /a minute_end=!_time_end:~3,2!
	set /a hour_end=!_time_end:~0,2!
	if !hour_end! lss !hour_start! ( set /a hour_end=!hour_end!+24 )
	set /a second_end=!hour_end!*3600+!minute_end!*60+!second_end! 
	
	set /a time_spent=!second_end! - !second_start!
	if  !time_spent! leq 2 ( echo 223.95.165.%1 554>>C:/result.txt) 	
	
           

补充一种更严谨的办法,使用第三方命令namp,并把下载好的namp目录加入系统环境path中以便cmd识别此命令

命令行包下载地址:https://nmap.org/download.html

脚本简单多了,如下:

@echo off&setlocal ENABLEDELAYEDEXPANSION 

for /l %%i in (1,1,255) do  call :step %%i
echo 完毕!
pause


:step
	nmap -sT -p 554  223.151.22.%1|findstr "open"&&echo 223.151.22.%1 554 port is open>>C:/result.txt||echo 223.151.22.%1 554 port is not open