@Alf:
I have a completly different question now.
We have plugged everything up and everythins is running smooth. The internet connection is constantly maxed at 100Mbit/sec.
The only problem is that we cant connect to any games using Battle.net.
Do you have any idea what it can be? We have all ports open, nothing is blocked and no traffic shaper.
When we try to connect to WoW we're only getting instantly disconnected. WTF?
Edit: there is like one constantly playing WoW, everyone else cant connect
You need to forward ports per client for battlenet. i.e. 6112 on wan to client 1, 6113 to client 2, 6114 to client 3 etc.
This is why it is important to assign static LAN IPs for each client. You then notify each user as to the port they need to setup the bnet client for (default 6112).
IIRC, there is a limitation of 6 hosts per IP (WAN) for battlenet (at least for WC3/ Dota this holds true). You must setup the NAT so that each group of clients goes out a certain WAN IP for Bnet. This is best done with Manual Advance Outbound NAT (AoN).
i.e. You allocate 6112 to 6127 per table (with each client using one of the ports).
Then under AoN, you set the NAT so that ports 6112:6127 for 10.0.1.X (table 1) are mapped to one of the WAN gateways, 6112:6127 for 10.0.2.X (table 2) for another WAN gateway so on and so forth. Make these static ports.
This does not negate the 6 hosts per IP limitations but you shouldn't be having that many hosts on bnet to begin with. For regular WoW access, this should not be an issue so long as all the clients have unique ports.