What’s going on here??? Really Weird DNS Resolving Issue???



  • I really could use advice from anyone with Networking, DNS or DNS related experience. I believe this to be the issue (although I’m not certain).

    EQUIPMENT:
    -pfSense 2.3.1-RELEASE-p5 (i386) FreeBSD 10.3-RELEASE-p3.
    -Time Warner Cable (TWC) supplied router Arris TG1672G in bridge mode.
    -Netgear Router Nighthawk X6 R8000, again in bridged mode and only using wireless features. I use 4 of the available ports to connect other devices (laptop, printer, local server).

    ISSUE:
    I can not connect to certain domains, which coincidentally belong to a off-site physical server running linux centos. I can access the internet and browse a number of other public websites. I can successfully connect to the plesk control panel on the server, however I cannot connect to any website that resides within it. Really weird.

    THINGS I’VE TRIED:
    -Verified that the domains are working. They can be accessed from a cell phone using the providers data rather than my wireless network.
    -Reset the cache in Safari, Mozilla.
    -Reset the cache in pfSense.
    -Reset and factor reset numerous times the TWC router, pfSense router, and the NetGear Nighthawk.
    -Performed ping test from laptop using Terminal on Mac and all tests returned successful.
    -Removed all pieces of hardware then connected laptop directly to TWC router and was SUCCESSFUL in connecting to the domains in question.

    WHAT COULD HAVE CAUSED THIS ISSUE:
    The system had been working correctly up until last week. The only change that was made was that I upgraded the pfSense to v 2.3.1. Prior to upgrade I had the version that did not have the new GUI design. Could this be the reason? If so, how to roll back changes to confirm or deny this hypothesis?

    WHAT I THINK MIGHT BE THE ISSUE:
    I think this might be related to a DNS issue. Although, truth be told, I’m not at all experienced enough to understand the technical details of how DNS works.

    I have SSH access to pfSense as well as the GUI.

    Please help as this situation is really frustrating…any ideas would be greatly appreciated!!



  • Is it really an issue with resolving DNS? If you try to ping the site by hostname, what's the result?



  • I can ping all the sites successfully.