@echo off
mode con cols=35 lines=3
set b=3
title [网络连接]
echo 1、上  网
echo 2、断  网
set /p floor=
if %floor%==1 goto one
if %floor%==2 goto two
title [输入错误]
cls
color c
echo.
echo  输入有误,程序即将退出!
ping 127.1 -n 3 >nul
EXIT
:one 
cls go to pwd
:pwd
title [密码输入]
set /a a=%a%+1
set /a b=%b%-1
echo.
set pwd=""
set /p pwd=请输入密码:
if /I "%pwd%"=="198504" goto main
if /I "%a%"=="3" goto err
cls
echo 错误 %a% 次! 您还有 %b% 次机会!
goto pwd
:err
color c
mode con cols=35 lines=3
title [密码错误]
cls
echo.
echo  错误次数达到三次,程序即将退出!
ping 127.1 -n 3 >nul
exit
:main
title[密码正确]
cls
echo.
echo 密码正确，正在连接，请稍候...
netsh interface ip set address name="本地连接" source=static addr=192.168.15.18 mask=255.255.255.0 gateway=192.168.15.254 gwmetric=1*
cls
echo.
netsh interface ip set dns name="本地连接" source=static addr=61.177.7.1 register=PRIMARY
exit

:two
title[断开连接]
cls
echo.
echo 正在断开连接，请稍候...
netsh interface ip set address name="本地连接" source=static addr=192.168.15.18 mask=255.255.255.0 gateway=1.0.0.0 gwmetric=1*
cls
echo.
netsh interface ip set dns name="本地连接" source=static addr=1.0.0.1  register=PRIMARY
exit
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