What is a "forward map" in dhcp?

[Felix Kaechele]

Am 14.06.2010 13:32, schrieb Timothy Murphy:
> When my son tries to connect to our LAN with his Blackberry,
> the request is first refused and then accepted.
> Why is this?

The DHCP log looks totally normal and nothing related to the DHCP 
protocol is being rejected. What is being rejected is the DHCP server's 
try to update the DNS server with a reverse DNS (PTR) entry. As the DNS 
server does not seem to be configured to allow this the request is rejected.

For more info on dynamic DNS in DHCP see 
http://www.ops.ietf.org/dns/dynupd/secure-ddns-howto.html

Felix