Dns & dhcp

[Deland01]

#147553

I’ve been having a few issues with file & print sharing & also DNS, I can’t seam to connect to some PCs when I should be able to. I think this may be down to either the DHCP or DNS we have set up.

The DHCP enabled on our local LAN woks on a 192.168.0.x range. We also use the following ranges:

192.168.2.x – used for servers
192.168.10.x – used for computers on a different subnet / building
192.168.102.x – used for VOIP telecoms

I’ve noticed that some computers have a DNS A Record pointer in the forward lookup zones which is different form the record in the reverse lookup zone. I also spotted that the IP address of the a PC in the forward zone is in use be a totally different PC in the DHCP address pool. As an example:

DNS Forward Lookup Zone
Computer001 = 192.168.0.55

DNS Reverse Lookup Zone
Computer001 = 192.168.0.80

DHCP Reservation Pool
Computer055 – 192.168.0.55

My question is how are the DNS A-records created, is this something that has to be done manually, or are they added automatically by something? I don’t want to go changing things until I know how this works.

Finally I also noticed that the DHCP has a yellow exclamation mark against the DHCP server – see attached, any suggestions how to find out what the issue is?

Thanks in advance.

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