DNS Problem

Apologies if this has been answered elsewhere -- searching hasn't yet solved my problem... Also sorry if this is in the wrong section.

My problem:

I'm using a laptop computer on a home wireless network and for quite some time now a number of websites don't load. Firefox displays an "Unable to Connect" page saying that "Firefox can't establish a connection to the server at ____"

Internet Explorer says "Oops! This link appears broken. DNS error occurred. Server cannot be found."

This has been getting somewhat problematic.

The pieces of the puzzle that I know:

A desktop connected with a wired connection through the same router can access the same site with no problems.
Likewise, an iPhone connected to the same wireless connection has no problems at all.
The hosts file on the problem computer is clean.
Flushing the DNS doesn't fix the problem.
Reducing the MTU doesn't fix the problem.
Resetting the router, modem, and computer don't fix the problem.

I would greatly appreciate any help you might be able to offer!

Thanks much --
2 answers Last reply
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  1. have you checked if the proxy settings have been enabled?
  2. Thank you for the suggestion!

    Firefox was set to "use system settings." I changed it to "No Proxy." This didn't seem to fix the problem.

    Some more information:

    For a common example: I type in usaa.com and get the aforementioned error. If I go to google and type in usaa.com, then click the link to usaa.com, I can get to the website with no problem.
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