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Beeder
Asked: 2013-10-09 13:56:24 +0800 CST

Specific web pages won't load from within domain network

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Several months ago...my entire work domain network started having problems accessing yahoo.com. The web page appears as though there is some sort of scripting error...i.e. pictures and news feeds don't load correctly and the site's navigational buttons (Mail, News, Sports, Finance, Weather...etc) all appear on the left hand side of the page as simple blue hyperlink text.

Then, about two weeks ago the entire domain started having problems streaming videos from youtube as well. The web page loads fine, but when I try to play a video...it "thinks" for a second or two then skips straight to the end where the video plug-in offers links to similar videos.

Up till now, I've been approaching this issue with the assumption that its caused by some sort of scripting issue with the browsers. So I started my troubleshooting by trying to access the same sites from within the domain using different browsers. Chrome, Firefox and IE all yield the same result. After that I tried clearing the local browsing cache, changing some scripting settings within the browser itself or, in the case of the youtube issues, updating/reinstalling flash player.

I am able to take my laptop home and view both web pages without issue. This has led me to suspect that clearing the DNS cache on my DNS/DHCP server might help but I am looking for advice at this point.

The general layout of our domain network is as such;

2 physical campuses each with their own 20mb fiber optic internet connection

Both campuses are protected by ASA5510 firewalls, each campus has an on-site DNS/DHCP server as well as a web filter server (Websense). On one campus...the servers all run Server 2003 while the other campus is running Server 2008 R2 on the domain controller and filter server.

The two campuses are currently linked with two T-1 lines that provide inter-site communication for file sharing and such. Eventually, these T-1 lines will be replaced with a site-to-site VPN portal set up through the ASA5510s on each respective campus. While this information may not be relevant...I figured I'd throw it in there anyway.

If anyone has any suggestions for other troubleshooting steps PLEASE let me know. I'm at a loss here and don't really know what else to do.

If you need any supplemental information about the issue, the network or the computers being used in the network please just let me know what you need to know and I'll be happy to provide what information I can.

Thanks in advance to you all!

windows-server-2008

1 Answers

  1. Install FireFox

    Install an add-in like HTTPFox ( https://addons.mozilla.org/En-us/firefox/addon/httpfox/ )

    Go to Tools -> Web Developer -> HttpFox menu item, open in new window, and make the window bigger. Click the 'Start' button in the top left.

    Visit yahoo.com in the main browser window, HTTPFox will fill with request details. Click 'Stop' when the page has/hasn't loaded.

    Look through them - it will show you what Firefox asked for, what the server sent back, how much data, how long it took, and all the HTTP headers.

    I don't know what you will see, but maybe some which aren't loading will stand out.

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