I re-installed my pfsense firewall the other day, sometime soon there after my macbook stopped doing backups using time machine.
The pfsense is installed on new hardware, but the config was restored from the old, so it should be the same as before.
The Time Machine target is a synology diskstation, which has worked fine for the at least the last 6 months.
I don't understand this multicast magic good enough to know where to even start troubleshooting. Any help is appreciated.