I am experiencing some DNS Resolution issues to my external sites and am looking for assistance in correcting these. Here is the setup I am currently running.
1. I have two physcial segments to my network. One segment is our corporate production network. We use MS Active Directory 2008 with Microsoft DNS implemented. Our internal corporate Domain is called SLBNTDOM.NEPTUNETG.COM. This segment has various VLANs that are handled through a Cisco Core Layer 3 Switch. These VLANS have IP Address of the schemes 10.8.x.x, 10.7.x.x, and 10.3.x.x. The second physcial segment is for a test/development network that we utilize for developing software products and allowing customers to access and demo these products. This segment uses and IP Scheme of 10.6.x.x. Routing between the two physcial segments is done using a Cisco ASA firewall.
2. All servers, clients, etc are connected to the same AD Domain (slbntdom.neptunetg.com).
3. I utilize Network Solutions to manage the DNS Records for the various external sites I have. For my production segment, I have records of the form name.neptunetg.com that points to the external IP Address for our Website, FTP Site, etc. These external IP Address are of the form 24.227.104.x. For my test/development segment, I have a separate ISP providing me a connection. These records are of the form name.neptunetg.BIZ. The external IPs for this segement are of the form 71.42.174.x.
4. Here is the actual issue I am experiencing when I try to perform Name Resolutions to these addresses. If from my PC internal to the production, I perfom an NSLOOKUP on SOUTHWEST.NEPTUNETG.BIZ, it trys to look up from one of my DCs running DNS the address but returns saying that it can't find the record: Non-existent domain. My internal DNS is not aware of this Domain but I assumed the request would be handed off to the external DNS to resolved as is when I do the same NSLOOKUP for www.yahoo.com
. Is this request not being handed off? My entries are correct in Network Solutions.
5. Another part of testing I am doing is taking my laptop which is also a member of my AD Domain and connect it externally to an internet connection like from home or something. if I perform a PING SOUTHWEST.NEPTUNETG.BIZ, it resolves the address correctly. But when I perform an NSLOOKUP SOUTHWEST.NEPTUNETG.BIZ from this same laptop, it appends the SLBNTDOM.NEPTUNETG.COM to that name and for some reason it resolves it to the main web page for our WWW.NEPTUNETG.COM
What is going on with me resolving these DNS records for NEPTUNETG.BIZ?