I think we have some problems with our DHCP/DNS setup. We are using ISA 2004
for VPN & Firewall access, when our users connect via the VPN, their laptops
(WinXP sp2) aren't registering with DNS, although when they are in the
office on the LAN they do. ISA is configured to use our internal DHCP server
to issue out IPs, rather than issuing them from it's own static pool, and in
the advanced setup it's configured for DNS & wins to be issued via DHCP
If you look at DHCP address leases it has 10 IPs leased to the ISA server
(unique ID - RAS), so ISA seems to be using the DHCP server correctly.
However if you look at the forward and reverse lookup zones in DNS none of
the IP details are registered.
Both DNS & DHCP are installed on the same server, windows 2003 sp1,
configured as a DC, DNS is AD integrated. ISA server is win2003 sp1,
standalone, using RADIUS to authenticate users with the DC.
DNS tab in the DHCP scope has:
Enable DNS dynamic updates - checked.
Always dynamically update DNS A & PTR records - selected.
Discard A & PTR records when lease is deleted - checked.
Dynamically update DNS A & PRT records for DHCP clients that do not request
DHCP lease is 5 days, DNS scavenging is 5 days, dynamic updates are secure
I can't think of anything that might be wrong! Am I missing something? I
think it's starting to affect some of our applications, such as VoIP, as
name resolution isn't working.