[GTALUG] Reverse DNS different that DNS server (reverse is a local address)

[James Knott]

On 2020-11-22 2:13 p.m., Joseph Rocklin via talk wrote:
> Hi all,
>
> I just tried a reverse dns lookup on whoismydns.com for my wife's  
> computer on a family-member's network.
>
> Result:
> DNS Server: 67.231.208.167
> Reverse DNS: pub-cdns3-wlfdle-eth1.rpub.net.rogers.com
> IP Owner: Rogers
>
> Does this seem correct? I have my dns settings set on my machine and I 
> get my expected DNS results on my machine on this family member's 
> network. Is there any reason to be concerned here?
>
> I had noticed a while back, before upgrades on this family member's 
> network, that utopia.net was being used as the DNS server. It was on 
> more than one machine that used that network. Now I'm wondering if 
> somehow this network was routing, in a still-problematic way, but just 
> via a local address?
>
> I may have confused some concepts as I am just getting my feet wet 
> with this topic of DNS servers.
>
> If anyone has suggestions to confirm if the network is properly setup, 
> please let me know.
>

Why are you looking up the DNS, when you want to look up your wife's 
computer?  Look up her WAN address.
Her host name should be something like cpe<router MAC>-cm<modem 
MAC>.cpe.net.cable.rogers.com.  Host name changed to protect the guilty. ;-)

She should also have IPv6 addresses.