DNS issue

I have something strange happening here. Users are losing their connection to a server running a license manager for Autocad. When this happens and I ping the license server by name from their workstation I get an ip of 216.139.250.120. It should be 10.1.1.2 since it is set as static on that server. If I flush the DNS cache and do an ipconfig release/renew on the workstations, the license server’s correct ip address shows, and they can open Autocad.

I just tried pinging the backup domain controller from my workstation and I get the same address, 216.139.250.120. Any idea what is causing this? When I look up 216.139.250.120, it shows a company called networking@hostwaydcs.com.

We use AD integrated DNS. I checked all internal DNS settings and that 216. address does not show up in forward or reverse lookup zones.

Any idea what is going on here?
Thanks,
cja

DNS

Last Comment

cja-tech-guy

8/22/2022 - Mon

rharland2009

12/15/2014

What is the IP address of your DNS server? Is it your DC?
Is it possible there's another computer on your domain with the same IP as your DNS box?

cja-tech-guy

12/15/2014

ASKER

The DNS servers are the DC's. They are set to static addresses that are outside the DHCP scope, so I do not think there is another machine with a duplicate DNS server address.

Kimputer

12/15/2014

You said "license server by name", so I assume it's not a FQDN? Is there any WINS server in place?
Any hosts file in use?
Did you do an nslookup on the client pc with that problem to be sure?

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ASKER CERTIFIED SOLUTION

cja-tech-guy

12/29/2014

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