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Internal name resolution set up for mixed server environment

Posted on 2003-03-20
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Last Modified: 2010-05-18
Hello,

I don't know if I may be missing some fundamental common sense right now but I need some help. I support a client network that is a group of standalone servers, mostly Win2000 Server but some Solaris and a couple of NT 4.0's still hanging around. Currently they host their own DNS servers. The servers within the network point to these two servers for their own DNS resolution as well.

They will be switching over to a hosted DNS service. The servers currently exist on various network segments interconnected by a firewall. There are some proprietary applications on the servers that connect to other servers across the network segments. Currently some of these applications have setup parameters that talk to the other servers by their FQDN. For example, within the code itself it will say "create socket with server.company.com on port xxxxx".

My question is... once we flip over to the hosted DNS what should I do about internal name resolution? Do I set up DNS on one of the servers and add all of the entries or do I point the servers to the external name servers? I feel as though I must be missing the obvious here but I am not sure how to proceed. Any suggestions would be appreciated.

Thanks,
Dawn

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Question by:Dawn_Bl
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MSGeek earned 1000 total points
ID: 8175535
IMHO, you should always have an internal DNS server.  Any requests not answered internally get forwarded.

"I set up DNS on one of the servers and add all of the entries or do I point the servers to the external name servers?"

I would set up at least two internal DNS servers, primary and a secondary for redundency.  You may be able to populate your DNS from external server, rather than entering all data manually.  Another good reason to have a secondary and to back up your zones.
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Expert Comment

by:hulmic
ID: 8175634
Yes. Internal is needed and you'll need more than one for redundacy.  These DNS servers will query your external DNS for resolutions it can't figure out.  You may decide also to include some type of caching element to you internal servers so that you do not create extra traffic for each name resolution request.
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Author Comment

by:Dawn_Bl
ID: 8175781
Thanks... I'm not sure why my brain is having such processing problems today. So my two internal DNS servers will essentailly be hosting duplicate information in standard primary and secondary zones under the same domain name as my external servers and I will enable forwarders and have it forward to my external servers.

Seems easy enough... I have set up Win 2000 DNS several times it's just this network config that is throwing me off I think. I keep thinking I am going to confuse things with duplicate information as we've only ever had one pair of DNS servers before. The fact that there is no actual "domain" internally seemed confusing.  

Thanks for your help... I will assign the points to MSGeek as he answered first and they were similar respones but I do appreciate all the comments.
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Author Comment

by:Dawn_Bl
ID: 8175791
Thanks MSGeek

I will do as you suggest and set up to internal servers with the appropriate domain information and have all my internal devices point to those.
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by:MSGeek
ID: 8175847
Glad I could help, given that some of these servers are in different locations you may want to place your secondary at another location so your servers are not using link through firewalls to resolve DNS.  Thanks, MSGeek.
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