Cyber_Death

If I setup a caching server, to cache all the services, this includes steam, origin, battle.net etc. for the DNS on the client side, will that DNS needs changing if I want to grab stuff of a different service? Let's say I'm doing some steam downloads (Already cached) , but want to switch over to a battle.net game (Also already cached) should the DNS on the client side change to the IP of the battle.net service or will it work just fine with the steamcahe IP? Thanks in advance! Jannes