Tunngle creates virtual LAN network and let gamers play with remotely located friends via LAN. So is this possible to get VAC ban (on VAC enabled games) if we use Tunngle with steam ?
"Playing multi-player mods which do not modify core .EXE and .DLL files" clause was previously mentioned at steam vac page according to answer to the question about how VAC works but as you can see. This clause has been removed. So I am confused.
Update: Valve response
We do not provide analysis of third party software for VAC compliance. Any third party software, skins or other modifications you use in conjunction with Steam should be done at your own discretion.
Only cheats (modifications designed to give one player an advantage over other players) will trigger a VAC ban.