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  • DNS resolution problems - Spain

    javiers

    By javiers

      • Version: All Product: WRobot General Type: Bug Status: Not a Bug
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    Hi!

    Not sure if bug or network problem.

    1. The classical message (cannot contact Wrobot, disable firewall, etc) is triggered on startup.

    2. I followed all suggested torubleshooting steps. However, I noticed that i was unable, also, to surf the wbrobot.eu web,so I obviously thought that it was a network connectivity problem.

    3. I fired up Linux on the same machine (dual boot) and still, not able to browse wrobot.eu.

    4. Tried from my phone (it is a different ISP). Same problem, wrobot.eu is down.

    5. I used a Proxy service from the main machine (Windows 7) to browse from the USA. No problem at all.

    6. I used another PC from another location, different ISP. No problem to browse wrobot.eu

     

    So I tried nslookup to check the DNS resolution from my ISP's provider DNS (62.36.225.150)

    Quote

    > server  62.36.225.150
    Default Server:  dnscache1.wanadoo.es
    Address:  62.36.225.150

    > wrobot.eu
    Server:  dnscache1.wanadoo.es
    Address:  62.36.225.150

    *** dnscache1.wanadoo.es can't find wrobot.eu: Server failed

    And then I tried using one OPENDNS root server (208.67.222.222):

    Quote

    > server 208.67.222.222
    Default Server:  resolver1.opendns.com
    Address:  208.67.222.222

    > wrobot.eu
    Server:  resolver1.opendns.com
    Address:  208.67.222.222

    Non-authoritative answer:
    Name:    wrobot.eu
    Address:  94.23.205.123

    7. I tried again from my cellphone and wrobot.eu was up...for like 5 minutes.

    8. Tried from another cellphone, different ISP provider. failed.

     

    Conclusiosn:

     

    a. There is a problem for the DNS resolution for wrobot.eu at least at Spain.

    b. Four different ISP providers tested, two do not work, one does work intermitently, another one works.

    If I edit the /etc/hosts file for wrobot.eu and set it manually to 94.23.205.123 IT DOES work browsing wrobot.eu; however other subdomains (download.wbot.com) don't work. I assume the subdomain/service Wrobot contacts is another different one and does not simply connect to wrobot.eu.

     

    Have you changed DNS CNAM, A or TXT records for your domain recently?.

     

    Regards.

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    Recommended Comments

    javiers

    javiers 2

    Posted

    Hi!

    Yeah, it is really weird and i didn't reported it before being absolutely sure that the problem wasn't exclusively mine..different ISPs, machines, Operating systems...

    Not at home just now, I was indeed planing to switch to OpenDNS, I just forgot moths ago when the ISP set up the router but didn't made it because I am lazy and it worked...

    Will try in a couple of hours and let you know.

    Thanks!

    javiers

    javiers 2

    Posted

    Hi!,

     

    Confirmed. DNS Problem. As soon as I used the OpenDNS root servers everything got fine.

    I tried in different machines just FYI.

     

    Regards.



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