DNS Question

[dougcoulter]

Hello everyone - I have a quick question regarding DNS.

We have a nonroutable network that sits behind a NAT router that provides Internet access. On the Internet, we have a registered domain called krusecontrols.com. As such, our e-mail servers (popd.krusecontrols.com and smtp.krusecontrols.com) and our web server (

http://www.krusecontrols.com)

is managed by our ISP outside of our network.

I was working through setting up our DNS server last night. I would like to name our internal, nonroutable domain krusecontrols.com (although I am not sure this is such a good idea). I noticed when I did this, my clients could not resolve smtp.krusecontrols.com, etc. since my DNS server does not have an entry for it - although the clients are able to resolve

http://www.krusecontrols.com

for some reason.

My questions are these: (1) should/can I even name our internal network the same name as our routable Internet presence, (2) if so, what is the best way to handle resolving names that are outside of our subnet?

Thanks!

 

[micronmega]

1) Yes you can name your internal the same as the external, many companies have that setup and seperate the two with a firewall of some sort.

2) You'll have to add hosts of smpt, pop,

http://www etc

to your internal DNS pointing to the external IPs.

 

[dougcoulter]

Thanks micronmega. Can I safely assume that the IP addresses for those hosts will not change over time - or is there some way to tell DNS to look at another DNS server (external to our local network) for the name resolution for these specific hosts?

 

[micronmega]

it is safe to assume your external smtp, pop, and

http://www servers

will not change. Your ISP probably has a few people hitting those servers, they'd hopefully notify you if they were going to change.

Because of the dns name, your clients will always look to your dns servers first, you could try to setup domain called smtp.krusecontrols.com and delegate that to the ISP dns servers, but i think that's more work than ya need to do.