10-30-2009 07:53 AM - edited 03-06-2019 08:23 AM
G'day Experts,
I have a private network: 192.168.1/24
I have a single public static IP address from my ADSL ISP.
I have a server which hosts a DNS with a private address 192.168.1.10 in my private network.
I have created a NAT 1:1 to my private server 192.168.1.10 to my public IP.
The requests from the internet work fine, my DNS resolve to my public IP address fine.
BUT
Requests from my private network 192.168.1/24 point to my public IP address which my router does not loop back through to my server.
I know a lot of routers/gateways support this feature, I just can't get it to work on my 800 series
Any assistance apreciated.
Cheers,
Arthur.
10-30-2009 10:51 AM
Arthur,
It won't work in this case when private network tries to connect the IP of the DNS that is your public IP address on your router. The router won't do a static nat back to the 192.168.1.10. Because the requesting packets are not coming from the outside interface(Internet interface). In case of ASA firewall, it has a dns doctoring to solve this problem. I have never seen any feature on the cisco IOS to do this. What about setting the dns with the private IP address for internal users? (grin)
HTH,
Toshi
10-30-2009 05:17 PM
G'day Toshi,
I have this config file from a Cisco 800 series which was doing it, I just can' tell how. I have a couple of these Routers at clients places setup by their ISP's that do it.
I refuse to think you can't do it with IOS, so many home brand router/gateways support this feature.
Any assistance very much appreciated.
Cheers,
Arthur
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