Secondary dns zone not updating

Starting with 2008 SP1 (the first relase of 2008), this interval has been lowered to 1 hour.See Scavenging works well with the default DHCP lease time (8 days) and the default update intervals.Thus, for those clients that cannot update their records, DHCP can update DNS for them.There are some fringe benefits to having DHCP update our records in DNS.DNS is at the core of our technical infrastructures, but has some security drawbacks to it.One is that, in a DNS zone that does not have security turned on; any record can be overwritten (or duplicated) by any source.

– The scavenging service (done at the server level in the DNS management console) should only be done for one server that owns the DNS zone to avoid premature removal from the DNS database. Be aware of how your services, that use DNS, update their records in the database.Enabling DNS Secure Only Updates This article is aimed to help start us on the right track to enabling DNS security in our organization in a way to best support all our users while protecting our resources.As with any network change, it is aimed at impacting users and services as little as possible.This is even truer when implementing secured DNS zones.– Proper DNS Scavenging – DNS Scavenging is not a critical service, but it can help make administration easier and improve server performance.

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