I'm at a small school (300 networked devices) that is having an issue with port security. Itisn't setup on the network here but they have a WAN connection to a state-wide consortium that does video conferencing with Polycom units. That group does use port security and when we try to connect our Polycom to the main network and then out to them it is getting blocked because of the flood of MAC addresses coming off of our main network. If I shut off all computers on the network, reboot the WAN switch, then it works because there are only a few MAC addresses. Once the rest of the network is back up though it gets blocked again. How can I stop them from seeing all of our network MAC addresses? We have Dell PowerConnect Gigabit 2748 switches in each closet and each closet is connected with fiber. We are on one VLAN, Server 2003 Std, all Windows XP/Vista/7. Wiscnet is our Internet provider and they supply and manage the router/firewall. Our solution for the time being is to have it connected to it's own switch off of the network and it stays in one room, but it would be nice to be able to move it anywhere in the building and have it connect.