Tuesday, January 20, 2009

OpenBSD pfsync protocol change between 4.3 and 4.4

This doesn't appear to be well advertised, but there are some protocol changes in pfsync between OpenBSD 4.3 and 4.4 that make them not able to talk to each other.


If you're doing staggered upgrades of firewalls like I did, this might burn you.

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