Updating bind with dynamic
While the directives are optional, the resource records are required in order to provide name service to a zone. Increasing this value allows remote nameservers to cache the zone information for a longer period of time, reducing the number of queries for the zone and lengthening the amount of time required to propagate resource record changes. Note that when two nameservers are listed as authoritative for the domain, it is not important whether these nameservers are secondary nameservers, or if one of them is a primary server. (Recall that I earlier allowed updates with this key in the BIND9 configuration). ( 2012040233 ; serial 900 ; refresh (15 minutes) 900 ; retry (15 minutes) 604800 ; expire (1 week) 3600 ; minimum (1 hour) ) NS local.
This is what DHCP3-server uses to authenticate itself to BIND9 in order to make updates. to prevent recursive servers from sending unnecessary queries to Internet servers that cannot handle them (thus creating delays and SERVFAIL responses to clients who query for them). ) allow a secondary nameserver to only download the updated portions of a zone modified on a primary nameserver.These empty zones ensure that immediate and authoritative NXDOMAIN responses are returned instead. Compared to the standard transfer process, this makes the notification and update process much more efficient.The Windows machines handle their dynamic DNS updates (or they ask DHCP to do so). This option allows DHCP to create records for these machines which do not or cannot request dynamic DNS updates.I recently built an internal DNS/DHCP server which I wanted to support Dynamic DNS updates.