Facing an issue we've not faced before; the problem concerns an onsite premise.
Tha Lan is setup around a simple domain environment. 2 Domain controllers (Primary and secondary), each having a DNS. This morning all hosts were discarded automatically from the DNS and we were no longer able to ping most of the devices over IPv4. On the other hand IPv6 works.
Any idea to why:
- We're unable to ping any IPv4 but able to ping IPv6 (We get the IPv4 address by going on every machine and typing ipconfig on command line)?
- The A records belonging to client PCs were discarded from the DNS.
All client computers are able to browse the internet and ping the gateway but not other internal devices.
When executing ipconfig /registerdns from my client pc I get the following error in event viewer:
The reason the system could not register these RRs was because the DNS server contacted refused the update request. The reasons for this might be (a) you are not allowed to update the specified DNS domain name, or (b) because the DNS server authoritative for this name does not support the DNS dynamic update protocol.
Thanks in advance.