alt Hacker NewsThe computers that moved from OpenBSD to Ubuntu were our local resolving DNS servers. These don't use PF and we also wanted to switch from our previous OpenBSD setup to Bind, where we were already running Bind on Ubuntu for our DNS master servers. The gory details were written up here: https://utcc.utoronto.ca/~cks/space/blog/sysadmin/UsingBindN...
We may at some point switch our remaining OpenBSD DHCP server to Ubuntu (instead of to FreeBSD); like our DNS resolvers, it doesn't use PF, and we already operate a couple of Ubuntu DHCP servers. In general Ubuntu is our default choice for a Unix OS because we already run a lot of Ubuntu servers. But we have lots of PF firewall rules and no interest in trying to convert them to Linux firewall rules, so anything significant involving them is a natural environment for FreeBSD.
(I'm the author of the linked-to article.)
Why do you say OpenBSD stopped "supporting bind"? You mean they don't include it in the base system anymore since the switch to unbound?
I mean.. It's one pkg_add away. It's a weird constraint to give yourself if that was the problem, considering you absolutely had to install it on your replacement ubuntu servers.