How do I fix intermittent DNS problems?

Apple 13.3
October 22, 2010 at 02:27:58
Specs: Macintosh , 2.4 GHz/ 4GB
How do I fix intermittent DNS problems over a wireless router? Some websites load, others do not, but when I flushcache and refresh and everything will work fine... for a few minutes, hours, up to a day. But usually more than once a day I need to flushcache.

The websites are irrelevant--sometimes it's Google, other times it's a friend's blog, or a newspaper website, ETC that I can't access. Browser is also irrelevant, I have the same problems in Safari or Firefox. When I ping the websites manually, I get the same results as in the browser (e.g., whatever doesn't load in a browser won't respond via pinging until I run the flush cache command again, and the websites that respond in the browser also respond when I ping).

I have a Mac (OS 10.6.4), and when I look up the nameserver in my network settings or via Terminal/cmd line, I just get the IP for my wireless router - a router assigned to me by the ISP and over which I have very little control over the setup. However, another user on a Macbook is also connected to the wireless router and never has these issues, leading me to believe it's my computer.

How can I fix this issue?


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#1
October 22, 2010 at 05:20:53
I know nothing about Macs but on Windows, I set the machine to use the DNS IPs of the ISP, not the IP of the router.

How do you know when a politician is lying? His mouth is moving.


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#2
October 22, 2010 at 07:17:32
another user on a Macbook is also connected to the wireless router and never has these issues, leading me to believe it's my computer.

This would be my first suspicion too. I'm guessing when you flush the DNS cache, you're doing it on the problem Mac and not on the router. If this is correct then this almost certainly points to the computer.

You can give guapo's suggestion a try and put the ISP's DNS addresses in manually on your Mac and see if that doesn't fix the issue. If it does, great, if it doesn't, then I can't really be of any help to you, I'm not a Mac guy.

The only thing I can suggest is seeing if there are updated drivers for the network interface on that Mac and if there are, update it. If not, you may be having issues with either the TCP/IP protocol stack, or the device itself may be having hardware issues. In any case, you'd need to find a Mac tech to get to help you. Sorry.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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