bind and dhcp updates

[Simon Hobson]

Scott Ware wrote:

>Is there any good way to have a dhcp server dynamically update the dns
>records with new dhcp clients' addresses?

Short answer : tell the DHCP server to do dynamic updates.

Less short answer :

Configure the DHCP server to do dynamic updates. For the ISC server 
this means adding the statement "ddns-update-style interim ;". 
Depending on your configuration you may need to do one or both of the 
following steps : generate a TSIG key and configure the DHCP server 
to use it, and tell the dhcp server where the authoritative DNS 
servers for each zone are to be found (by adding zone declarations to 
dhcpd.conf). Man dhcpd.conf is a good place to start, as is the 
excellent book "The DHCP Handbook" by Ted Lemon and Ralph Droms".

On the DNS end, you must also configure the DNS server to accept 
dynamic updates. This can be restricted by IP address, or by TSIG 
keys. Whether a zone may be updated can be controlled on a zone by 
zone basis, so you can have some zones updateable, and others not. 
Again, assuming you are using bind, man named.conf would be a good 
starting place, as would the book "DNS & BIND by Albitz & Liu".

Simon

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