I'm having what I believe to be a DNS issue.
We recently moved our office and have a new ISP; Comcast. We have a new external static IP address and that seems to be working. We are able to send and receive Email without issue. Comcast has updated our rDNS so that's all set too.
The problem is accessing certain web sites. For example, Google comes up fine but when I try to access support.hp.com, the site never loads.
I have a ReadyNet WiFi router (provided by Comcast) between our internal network and the Comcast modem which is in pass through mode. The ReadyNet router is acting as our Gateway and for all intents and purposes is working as it should.
When I use nslookup from my workstation for www.google.com
, I get 2 responses. The first is from our internal DNS server. Good. But the second, Non-authoritative answer is:
.<our internal domain name> i.e: www.google.com.company.com
Address: <this is our old external static IP address
I'm at a loss as to how it can be returning our old external static IP. Where is it getting that from?
I have 3 servers. One is the DC the other is our Exchange server and finally, a secondary DC of sorts.
Both the DC's are running DNS. One DC is running Windows Server 2008 R2 Std. Ed. and the other is running Windows 2003 Std. Ed.
The funny thing is I can surf any website from the servers without issue. Of course, these all have static IP's, DNS IP's, etc.
However, if I do an nslookup …