[knot-dns-users] notify question

I'm fairly new to knot so this may be a strange question that I am just not quite getting the config for notify somewhere. I have this in my config: remotes { dnsp61 { address 192.168.1.173; } } zones { storage "/var/lib/knot"; dnssec-keydir "keys"; dnssec-enable off; brettcarr.uk { file "brettcarr.uk"; xfr-in dnsp61; # define 'master' for this zone notify-in dnsp61; # also allow NOTIFY from 'master' } The zone axfr's at startup no problems. The master (dnsp61) is sending notifies to the knot server (192.168.1.170) as you can see from tcpdump output below 18:24:55.310553 IP 192.168.1.173.42438 > 192.168.1.170.domain: 27743 notify [b2&3=0x2400] [1a] SOA? brettcarr.uk. (89) but the knot server is not reacting to the notify. Am I missing something? TIA -- Brett