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Adding second WAN/DNS server

By Admin-Stuart ·
Right now, we've got one gateway router and WAN link. A new router for a second WAN link (to connect to our company intranet at main office, we're a remote branch office) is coming tomorrow. It will be set up as a second gateway/WAN link. I'll enter it in TCP/IP properties as a second gateway on all the PCs and servers here. Our local network is all MS, NT servers and Win9x clients.

Right now the two DNS servers we have configured on all servers/clients are located at the other end of our existing WAN. When the new router is set up, I'll either need to add a hosts file entry on all our computers for the new remote DNS server (only 70 clients, not too bad), or figure a way to add it to the existing DNS entries and make it work.What I'm wondering is if I were to remove the existing secondary DNS server entry to add the new DNS server (that way my primary and secondary DNS servers would be at the remote end of 2 different WAN links), would it present any problems?

Here'smy current thinking on a solution:

1. Remove current SECONDARY (leave PRIMARY as is) DNS server address in TCP/IP properties on all PCs here, replace it with new one from new remote site.

2. When clients here enter URL for new remote intranet site, the system will first go to the primary (existing router)gateway and primary DNS server to try to resolve. That will fail.

3. Search for secondary DNS server will fail because it's not there through old existing gateway.

4. Client will then inquire through second, new gateway and successfully find secondary DNS server.

5. Resolution will occur and connection successful.

Am I thinking right, or what can anyone suggest?

My record shows that I diligently award my points for correct solutions. I can test solutions early next week. Thanks, all.

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Adding second WAN/DNS server

by nschulz In reply to Adding second WAN/DNS ser ...

Taken from Mr. DNS

>can i configure an internal root dns server (a fake root, who does
>NOT contact the real root name servers...) such that it knows the
>real names and addresses of all local hosts, but will forward all
>other queries to a primary?

No. Roots and forwarding are mutually exclusive. A root believes it knows all legitimate top-level domains. Therefore, if you ask a root about any given domain name, it will either refer you to a name server that can answer the question or it will respond with NXDOMAIN (no such domain). It will not forward.

Thanks Norm

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Adding second WAN/DNS server

by nschulz In reply to Adding second WAN/DNS ser ...

Sorry this anwser was for a different question.

Thanks Norm

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Adding second WAN/DNS server

by Admin-Stuart In reply to Adding second WAN/DNS ser ...

Poster rated this answer

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Adding second WAN/DNS server

by Maelgwyn In reply to Adding second WAN/DNS ser ...

OK i see it as follows:


|----------| |-----------|
|Branch |--------------------->|Head office|
|----------| |-----------|

Currently all DNS is handled at the Head Office.

|----------| |-----------|
|Branch |--------------------->|Head office|
| |--------------------->| |
|----------| |-----------|

New link to intranet (to free up the first link)

There would need tobe an iterative link
(ie. primary DNS, secondary DNS (either through DHCP or static)

This would facilitate both DNSes. Those DNSes MUST be on a seperate subnet from eachother or they will find themselves on the one WAN link. Your DNS boxes would have seperate A records to that effect.

PLEASE if you need more information EMAIL me at robert@keato.zzn.com!

It will be possible, since if the IP set is different, it would be sent through the different routers.

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Adding second WAN/DNS server

by Admin-Stuart In reply to Adding second WAN/DNS ser ...

I've decided to just make a hosts file entry for the other WAN link since it only involves 1 or perhaps 2 hosts, but your answer is informative and I believe confirms what I wanted to know, you get the points. Thanks for the input.

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Adding second WAN/DNS server

by Admin-Stuart In reply to Adding second WAN/DNS ser ...

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