Not sure where the ISP's DNS is coming from...

Discussion in 'Tomato Firmware' started by dfrandin, Mar 8, 2014.

  1. dfrandin

    dfrandin Addicted to LI Member

    I'm running Shibby's "Tomato Firmware 1.28.0000 MIPSR2-115 K26 Max" on an Asus RT-N12 D1. My question is this: I'm using the onboard dnsmasq for local caching dns, and have it set to talk to the Google and dns upstream. I thought all was well but recently, apparently, my ISP, Cox has started with the #$#%#@ "extended error pages". Trying to figure out why I'm seeing these pages when I'm *supposed* to be getting dns from google... I remember the screams of anguish a few years ago when Comcast et al started with these pesky pages.. A bit of snooping and I notice on the "system overview" page and WAN area, I see the following ",,,,,".. The last 4 entries are Cox's DNS. How in $#@#$% are they getting in there?? Under "basic network/lan/static dns" there are three lines and I only have the two Google dns addresses listed.. Is Cox doing some hocus-pocus to prevent residential users from getting away from their dns?? They do have an "opt-out" of the extended error pages, but it doesn't seem to work...
  2. Grimson

    Grimson Networkin' Nut Member

    I'm using Toastmans build but you can check the following:

    Go to Advanced -> DHCP/DNS and make sure that "Use received DNS with user-entered DNS" is not ticked.
    darkknight93 likes this.
  3. dfrandin

    dfrandin Addicted to LI Member

    Ahh.. it was ticked.. didnt realize that was what that item meant.. That got rid of Cox's DNS.. Still kinda puzzling that those dns servers were ever even hit, since they were way down the list after Google's.. I could see it if Google's dns was down, but really..

    Thanks for the reply...
  4. lefty

    lefty Networkin' Nut Member

    And sometimes they will end up in there because if you notice for custom entries there are 3 slots for input, if you don't fill all 3 with entries then it will default back to your ISP's DNS servers, and of course not having the option ticked as mentioned above. Most times if i have only 2 entries to input, i'll fill the third blank out with some local host ip, such as and it almost certainly remedies that problem.
  5. Grimson

    Grimson Networkin' Nut Member

    I'd rather input one IP twice than use an invalid IP.
  6. dfrandin

    dfrandin Addicted to LI Member

    Unchecking the "Use received DNS with user-entered DNS" got rid of Cox's DNS and their braindead error pages..

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