프록시 on
reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "ProxyEnable" /t "REG_DWORD" /d "1" /f
프록시 off
reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "ProxyEnable" /t "REG_DWORD" /d "0" /f