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Weird DNS Problem

By minookarthik ·
Hello All, I have a weirdd problem going on with my network.
My internal domain name is companyname.com and the external is www.companyname.com.
When setting up the network I setup a New Host (A) records for ftp, www and mail because we have a hosted solution for our website (because the internal machines wont resolve to the ext. domain).
Now the problem is, from time to time the internal machines are not able to access any website but for mail.companyname.com, ftp.companyname.com and www.companyname.com. i.e. it is just able to access the ones with Host A records and nothing else. I checked the DNS Event Viewer, but nothing unusual. Called and checked in with my ISP also, everthingz fine. Can somebody help me with this please? Thanks.
PS: Running Win 2003 (STD) Server, Client PCs run on XP SP2. Sitting behind Soho 6 Firewall. Thanks.

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by minookarthik In reply to Weird DNS Problem

Point value changed by question poster.

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by BFilmFan In reply to Weird DNS Problem

The problem is that you have the externally published and internally published name spaces as being the same.

Most likely, your Windows 2003 server's DNS believes it has Start of Authority (SOA) for the zone and there is an external DNS server also claiming this authority.

You can have only ONE SOA for a DNS zone. Since you have an externally published name, then you should choose another DNS namespace for Active Directory.

Since you have configured Active Directory to the externally published name space, this will mean that you will have the enjoyable experience of re-implementing Active Directory.

Perhaps you would enjoy this thread:

http://techrepublic.com.com/5208-11189-0.html?forumID=3&threadID=181687&start=0

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by minookarthik In reply to Weird DNS Problem

So there is no other way other than re-doing my AD?? But I've seen bigger companies with the same internal and external domain name running fine without any issues? How is that possible? In fact I worked for a manhattan lawfirm which had a similar arrangement!! Please tell me there is a way work around it!!

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by CG IT In reply to Weird DNS Problem

here's a link.

http://support.microsoft.com/default.aspx?scid=kb;en-us;323380#6

read about root hints and fowarders.

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by CG IT In reply to

you need to remove your server as an Internet root hint server so that it fowards queries to Internet root hint servers. It doesn't now because it thinks its an Internet root hint server.

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by minookarthik In reply to Weird DNS Problem

When you say removing hint server, do you mean deleting "." zone from Forward Lookup Zones? Because, I dont see any "." zone in it, I only see 2 zones, companyname.com and _msdcs.companyname.com. Also dnscmd doesn't work when I tried deleting "." just for good measure. The problem still persists....it occurs for a 20 minute period and then resolves itself automatically but keeps happening every 2 to 3 days. Please help if you guys can. Thanks in advance.

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by minookarthik In reply to Weird DNS Problem

Is there anybody who would be able to address my last comment on this issue. I would greatly appreciate it. I cant seem find any "." zone in the forward lookup zone. Doesn't that mean that it is not a Root hint server? But the problem persists. Thanks.

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by Greybeard770 In reply to Weird DNS Problem

We use the same domain name internally and externally. DNS servers on both sides think they are the SOA for the domain and they do not know the other exists. That protects your internal computers from advertising on the Internet. Yes, you have to enter several things (public hosts like www, ftp, etc.) on both servers. That would avoid sites like ftp.www.company.com which just looks wrong.

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