BATCH – Modifica IP en archivo HOSTS.

@echo off

set IP-OLD=127.0.0.1
set IP-NEW=0.0.0.0

set file=%SystemRoot%\system32\drivers\etc\hosts

for /f "tokens=*" %%a in (%file%) do call :wri %%a
type "%file%.bak" > "%file%"
del /f /q /a "%file%.bak"
goto :eof

:wri
set lin=%*
call set lin=%%lin:%IP-OLD%=%IP-NEW%%%
echo %lin%>>"%file%.bak"
goto :eof