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Lincolnboy2 04-10-2013 08:49 AM

DNS Lookup Failures
 
Since Monday, my office network has been experiencing extremely slow responses, we are on a 6mbps wireless plan, have had it for 2-3 years now, and never anything like this happening..... This is a common screen that pops up no matter what site we are going to, in IE and Chrome/Firefox, doesn't matter. ATT says nothing wrong, speed test shows a good strong 5+ on the bandwidth, but still getting these "DNS Lookup Failure" Pop ups. Funny thing is, if you click wherever you are going the second time, it pops up immediately. This is a problem on all the computers (7+) in the office. AND I had the same errors at home on my home computer, different network different computer, different location!


Quote:

The server at xxxxx can't be found, because the DNS lookup failed. DNS is the network service that translates a website's name to its Internet address. This error is most often caused by having no connection to the Internet or a misconfigured network. It can also be caused by an unresponsive DNS server

or:

The server at www.process.com can't be found, because the DNS lookup failed. DNS is the network service that translates a website's name to its Internet address. This error is most often caused by having no connection to the Internet or a misconfigured network. It can also be caused by an unresponsive DNS server or a firewall preventing Google Chrome from accessing the network.
Here are some suggestions:
Reload this webpage later.
Check your Internet connection. Restart any router, modem, or other network devices you may be using.
Check your DNS settings. Contact your network administrator if you're not sure what this means.
Try disabling network prediction by following these steps: Go to the Chrome menu > Settings > Show advanced settings... and deselect "Predict network actions to improve page load performance." If this does not resolve the issue, we recommend selecting this option again for improved performance.
Add Google Chrome as a permitted program in your firewall's or antivirus software's settings. If it is already a permitted program, try deleting it from the list of permitted programs and adding it again.
If you use a proxy server, check your proxy settings or contact your network administrator to make sure the proxy server is working. If you don't believe you should be using a proxy server, adjust your proxy settings: Go to the Chrome menu > Settings > Show advanced settings... > Change proxy settings... > LAN Settings and deselect the "Use a proxy server for your LAN" checkbox.
Error 105 (net::ERR_NAME_NOT_RESOLVED): Unable to resolve the server's DNS address.

I don't know what's up, but it's like the internet is under attack or something. Anyone know what's going on or an educated guess?

Thanks!

PyrateSilly 04-10-2013 09:40 AM

These might explain some slowing down on the intranet:
Spamhaus under Attack : Slows down the Internet | Crypt Life
Internet Under Attack: World's Largest DDoS Attack Almost Broke The Internet | Techdirt
Bandwidth Speeds Affected Due To Largest Attack In Internet History - Technology News - redOrbit

chawkins99 04-10-2013 09:53 AM

Check ALL of the computers for viruses/malware even if they already have protection.

There are viruses (virii?) out there which will intercept DNS requests and redirect you to bogus web sites.

There are numerous methods that it could have made its way to your home computer.

Goto Malwarebytes : Free anti-malware download I use this all the time and it will often find stuff the mainstream A/V utilities miss.


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