Comments on: Comcast blocking access to website

By: Ann

Ann — Mon, 03 Nov 2008 18:48:43 +0000

Awesome, yosh! You’re very welcome and I’m glad that this info was able to help you!

By: yosh

yosh — Sun, 02 Nov 2008 17:18:38 +0000

I just found your post, after having the same issue as well. But the fix of changing your mac address and resetting your modem did the trick for me.
Thanks alot ann, comcast suxorz.

By: Ann

Ann — Mon, 17 Mar 2008 09:01:06 +0000

I’m sure the Comcast DNS servers frequently have problems as Comcast support did suggest I try setting mine explicitly using servers other than the DHCP provided ones as an initial troubleshooting step. However in my case this didn’t help as the issue was actually the routing between my Comcast-provided IP address and my destination IP.

Still as Bernd suggests it’s definitely worth trying alternate DNS servers in the troubleshooting process or even as a permanent option, especially if you notice frequent problems resolving domains with the Comcast provided servers and have access to more reliable alternatives. (There’s always OpenDNS: 208.67.222.222 and 208.67.220.220, though I don’t really have any stats on their reliability.)

By: Bernd

Bernd — Sun, 16 Mar 2008 22:24:24 +0000

A new IP address didn’t help me. What did the trick was specifying the Domain Name Servers (DNS) manually. Since I started using my alma mater’s DNS I have not experienced the dreadful “Server not found” message anymore. You may have been lucky in that you received a set of DNS from Comcast’s DHCP server that are not in overload, corrupted, etc.

By: Ann

Ann — Thu, 06 Mar 2008 06:05:15 +0000

Frank did write back to let me know that they were able to replicate the problem I was having on their end and it was indeed a routing issue. If this is happening to you then I suggest you do the following:

- Note your current IP address and the server you are having problems accessing. Report this info to Comcast (We_Can_Help@cable.comcast.com) stating your problem as a suspected routing issue.

- Request a new IP address from Comcast OR force an IP address change yourself by changing your MAC address and resetting the cable modem. Doing a DHCP release/renew should then get you a new IP that hopefully won’t exhibit the same problems.

By: vt

vt — Thu, 06 Mar 2008 04:14:21 +0000

I don’t think yours is an isolated problem. I had the exact same problem happen to me recently on a client’s website. For years I had no problems accessing the site, then all of a sudden a few weeks ago I got a server not found error message. I thought the problem was with the hosting provider, but I noticed I could access the website when I was at work.

The true test came when I used my home connection with a VPN token from work. Using my VPN token I could access the website. When I disconnected from my VPN, the website URL returned a server not found error.

I also had problems logging into the control panel for the ISP (LunarPages.com) for this site through my Comcast connection, so Comcast is blocking access to some LunarPages hosted websites…why I have no idea.

By: anonymous

anonymous — Thu, 06 Mar 2008 00:58:18 +0000

i go to a website that worked fine. then one day it stopped working. BUT! only for my internet. and other computers. and all comcast connections. another similiar site was blocked too. I have nothing to live for without them and I am now going to walk into comcasts offices and kill them all.

By: Ann

Ann — Sun, 02 Mar 2008 02:19:58 +0000

After some internet research I concluded that my problem was likely an isolated case relating to some kind of problem with routing between my current Comcast-assigned IP address and my client’s server (definitely EXTERNAL to my home network and pretty certainly within Comcast). I requested a new IP address and voila! Problem solved!

Thanks to Frank for looking into the problem for me. I also submitted a request to Comcast via Mr. Frank letting him know what my offending IP address was as well as my client’s server address so they can hopefully look into the situation to prevent it from happening again. Let’s hope I don’t get another problem IP address when the lease expires again…

By: gun slinger six

gun slinger six — Sat, 01 Mar 2008 23:43:54 +0000

I been think about this issue that you guys are having with Comcast.

Comcast has lost a lot of money and there stock price is going down hill fast then there service. There stock has always been selling at the same price at 20 - 16 between 2000 - 2006 now comes 2007 and the stock goes to a high of 27.08.
Then people start saying that they can’t get there web mail from yahoo and site are being block a long with other things that Comcast has done! So here my question for you Ann. Is it possble for a ISP to rise the stock price by filtering there network! My think for this is when Enron did it with power in Cal right before they want down! Now I know make power and running a ISP are to different things but, same kind of idea. By keeping traffic low on there network couldn’t they say to invester “look at are networks they are so fast because we put so much money in them?” When in reality all they are doing is pack filtering?
I don’t know if it possible but here the google page that kind of give me this idea!
http://finance.google.com/finance?q=comcast+&hl=en&meta=hl%3Den
Anyway just a thought and I have the flu! But I am still going out to meet Obama today!

By: Ann

Ann — Sat, 01 Mar 2008 20:22:30 +0000

The live chat agent did admit that Comcast blocks emails from some servers, but blocking all email from Yahoo is pretty extreme! Terrible that they haven’t done anything about it since it’s already been confirmed by their agents.

Another Comcast routing issue report:
SiriusAddict.com » Comcast Issues