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DNS settings in router and PC

198kHz
Seasoned Pro
Posts: 3,230
Thanks: 264
Fixes: 7
Registered: 30-07-2008

DNS settings in router and PC

I've more or less got my head round what DNS is all about, but there's one aspect which eludes me.
Automatic or manual settings are available in the router and the PC, but which take priority?
I'm thinking that if the router is set to auto, the DNS will be allocated by the ISP, and if the router is set to manual, then whatever I've entered will be used. If that assumption is correct, can it ever make any difference what the settings are in the PC? Would they only come into play if I was still using a USB modem?
Any enlightenment appreciated.
Not young enough to know everything
6 REPLIES
James
Grafter
Posts: 21,036
Registered: 04-04-2007

Re: DNS settings in router and PC

Afaik, the settings on your network card will override those set on the router (Obviously just for that computer).
Community Veteran
Posts: 4,766
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Registered: 14-07-2009

Re: DNS settings in router and PC

Open up a CMD window {type CMD in the Run box (XP) or search box (Vista, 7) then press enter}.  In the Window type ipconfig /all and press enter.  The IP addresses of your DNS servers will be listed (you may need to scroll up to see this).  In my case the DNS server IP address is the address of my router, meaning that my computer looks to the router which in turn supplies the Plusnet DNS server IP addresses it obtained automatically.
You can use this test to confirm that what Jameseh wrote is correct.   
198kHz
Seasoned Pro
Posts: 3,230
Thanks: 264
Fixes: 7
Registered: 30-07-2008

Re: DNS settings in router and PC

The light has dawned.  Smiley
Thanks James & RR.
Not young enough to know everything
Community Veteran
Posts: 38,300
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Registered: 15-06-2007

Re: DNS settings in router and PC

The odd thing is that my computer - Vista 64 bit - doesn't as it shows the router DNS entries
DNS Servers . . . . . . . . . . . : 212.159.13.50
                                                  208.67.220.220
Presumably it is how the router handles it as this difference has come up before
Community Veteran
Posts: 4,766
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Registered: 14-07-2009

Re: DNS settings in router and PC

Quote from: Oldjim
The odd thing is that my computer ... shows the router DNS entries
DNS Servers . . . . . . . . . . . : 212.159.13.50
                                                  208.67.220.220

Maybe the difference is that you have told your router to use fixed DNS servers whereas my router gets them automatically from my ISP (Plusnet).  My DNS servers could change (if Plusnet changes the IP addresses of its DNS servers) so my router tells the computer, in effect, "refer to me".  Yours are fixed so get passed on to the computer. 
Community Veteran
Posts: 38,300
Thanks: 968
Fixes: 57
Registered: 15-06-2007

Re: DNS settings in router and PC

Good call.
Changed it to automatic - rebooted Vista and I now get the router IP