Rik Farrow on VLANs

Rik Farrow wrote another great article, VLANs: Virtually Insecure?. That same issue of Network Magazine features a product highlight of a XML firewall built by Data Power Technology. I find this interesting because we now have to inspect, filter, and alert on traffic to specific ports like 80 tcp. This happens when developers code multiple protocols for a single port. We already have this problem with the Windows networking world, where ports 135, 137, 138, and 139 are used for multiple purposes by multiple services. Unfortunately, businesses can't firewall off port 80 to the world.

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