Brian about a possible GPL violation

In his blog, Brian points out that the Barracuda Spam Firewall 300 seems to be violating the GPL.

It's not yet clear what kind of software they actually include, but if a customer (who has received a binary copy of the GPL licensed Linux kernel) calls them up and explicitly asks for the source and then gets fishy answers like those pointed out in Brian's blog, then there's certainly something wrong.