Goodness, just noticed the many typos I made in my previous post.

I like the idea of simply using pings/pongs for firewall detection (by looking at any incoming connections as a response), but how long does that take though? And are you setting the "firewalled" status per connection, or globally? Just curious. The ConnectBack for supporting clients usually takes less than a few seconds.

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Okay, so I've been gone a while - but hey, meanwhile online translators have gotten better:

Ce n'est pas ma faute. Blâmer vous-même.

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Ne me blâmez pas. Blâment votre individu.