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Question

Interesting DNS issue

by 10r03r / November 3, 2012 2:33 AM PDT

Hi, today I faced a problem that was funny.
My ISP's default DNS is 208.67.222.222, 208.67.220.220 (OpenDNS public DNS IPs). Few days back I was able to changed the DNS to something else, like 8.8.8.8 (Google's public DNS), but right now when I try to change it, it disconnects my Internet. The interesting part is that I can still ping 8.8.8.8 with no problem.
Appreciate your help.

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All Answers

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Answer
Good luck with diagnosis.
by R. Proffitt Forum moderator / November 3, 2012 2:35 AM PDT
In reply to: Interesting DNS issue

Given that much detail your average tech would wait for more details.

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Hope it's clear now
by 10r03r / November 3, 2012 4:31 PM PDT

Hi Proffitt, I mentioned funny because it's that simple, right now I'm using 208.67.222.222, but as soon as I change it to e.g. 8.8.8.8, I no longer have access to Internet (8.8.8.8 can't resolve domain names), also at the same time, I can ping 8.8.8.8, so it's not blocked by ISP.
Something is blocking everything except 208.67.222.222 as DNS.
Hope it's clear now. Plain

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Not much to work with.
by R. Proffitt Forum moderator / November 4, 2012 1:07 AM PDT
In reply to: Hope it's clear now

Since this device might be remotely managed all bets are off. I can't guess the cause or could guess badly so I fear you need to talk with those that supplied this device or manage it.
Bob

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ports
by bill012 / November 4, 2012 11:05 PM PST
In reply to: Hope it's clear now

Ping does not mean they allow DNS. They may be tring to filter with opendns or something and block other DNS servers.

Try a command prompt NSLOOKUP www.cnet.com 8.8.8.8 , You could also try 4.2.2.2 but generally if one works they both work.

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