I WOULD totally agree with your prognosis. I am calling today to ask for redundant modems because I have experienced all the exact same symptoms described in this blog. They simply need to put in two modems where a customer has a wireless router, because the DNS process is completely messed up by the intermediate "gizmo" they install with the security systems... and it is NOT a passive bridge; the reason that we know it is not passive is due to the fact that they insist that it be in direct communication with your one and only modem; logically this means that the device is engineered to preempt packets from non-security wireless over packets from security related wireless devices. This is know in the industry as "shaping" the network... which is probably what the lawyers told them to do (over a golf game at Pebble Beach!!!!) to CYA legal vulnerabilities should a network fail.
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