If I'm on a Linux/Unix system that does not run a DNS server 'named/bind/other' the system does not cache any DNS query.
In case when I run primary DNS and want to update zone information, I have change the serial in zone and restart service:
# /etc/rc.d/named restart (for named)
# rndc (for bind9)
To update zone information, check if I get a right DNS answer:
# dig @dns_server example.com
If I run a secondary DNS server I just get a copy of the zone from primary server and there is no point to flush cache. I can push the server update zone from the primary server by deleting the zone file and restarting your DNS service.
On Windows I have call next one:
> ipconfig /flushdns
In case when I run primary DNS and want to update zone information, I have change the serial in zone and restart service:
# /etc/rc.d/named restart (for named)
# rndc (for bind9)
To update zone information, check if I get a right DNS answer:
# dig @dns_server example.com
If I run a secondary DNS server I just get a copy of the zone from primary server and there is no point to flush cache. I can push the server update zone from the primary server by deleting the zone file and restarting your DNS service.
On Windows I have call next one:
> ipconfig /flushdns
