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DNS setup heartache..

By edwardcox ·
Hello, hoping that some kind soul might be able to assist me.
We have a modem/router connecting via Telstra Internet Direct, on the router I have established a DMZ to a fixed IP. The router has DHCP internally (10.10.10.x), the DMZ machine is on 10.10.10.105 (fixed IP). On an external Name Server I have a hostname setup as an A record, i.e. dmz.mydomainname.com.au and it points to our router (external IP - 165.x.x.x). I would expect that when pointing my browser to dmz.mydomainname.com.au HTTP traffic would hit the router and be directed to the DMZ machine (a web server). But that doesn't work and I can't for the life of me figure out why?? I have tried to setup a local internal DNS as well, but that doesn't help and probably confused the issue. Any help from anyone would be MUCH appreciated.
Thank you in advance,

Kind Regard,

Ed Cox
DNS at a loss.

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NAT

by p.j.hutchison In reply to DNS setup heartache..

I may be due to NATing (Network Address Translation). Any user from -outside- the network will resolve the name:
E.g.
dmz.mydomainname.com.au -> 165.x.x.x address -> Router NAT -> 10.10.10.105 -> Webserver

On an internal network you would get this:

dmz.mydomainname.com.au -> 10.10.10.105 -> Webserver.

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