Hi,
The man page for nsd.conf claims the following syntax is valid:
provide-xfr: 0/0 NOKEY
However, this gives the error:
/var/dnsx/nsd.zones:9: error: Bad ip4 address '0'
The following does work:
provide-xfr: 0.0.0.0/0 NOKEY
So either the code is wrong, or the man page :)
Paul