OpenBSD's pf has a different (IMO better) syntax than FreeBSD's pf(4), the differences aren't that big though. There are also some differences in the network stacks. For example with FreeBSD's pf it's not possible to re-route traffic originating on the host itself without using tricks like setfib(1), in OpenBSD I believe it's possible with just pf rules.
I did toy around with OpenBSD 5.2 for a brief moment but got turned off when I found out that the project is still using CVS for version control. Also the website looks like a blast from the pre year 2000 past.
I did toy around with OpenBSD 5.2 for a brief moment but got turned off when I found out that the project is still using CVS for version control. Also the website looks like a blast from the pre year 2000 past.