So the zoo used a unused ip address for a new thing, i did not update a couple of cron jobs and systemd bitterly complained to the extent that one service would not load and so turned off all listeners
apachectl[*]: (99)Cannot assign requested address: AH00072: make_sock: could not bind to address x:y
apachectl[*]: no listening sockets available, shutting down
So having fixed the underlying issue to get apache working i had to bring down all our public interfaces just to satisfy systemd.
Fucking shit software
Another systemd example issue is that if login to my server systemd still keeps open processes even after i logout (i am not root)
Yet another is our postgresql cron job which is the only way to get posgresql to start.