hi,
try to switch to nsd from bind, but i've got a lot's of such error in
the slave server's log files:
Hi Levente,
In the slave config file use the keyword AXFR to make it do AXFR only. Like:
request-xfr: AXFR 10.0.0.11 NOKEY # master runs NSD.
The master responds with NOTIMPL on IXFR queries. Maybe you are running
NSD on the master too 
Best regards,
Wouter
Levente Farkas wrote: