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Old 09-20-2007, 04:31 AM   #1
dthomsen8
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Default Web Site Connections

Is it possible that some web site connections will be made, and not others?

This morning I can come in here just fine, and do postings, but connections to some other sites are refused. For example, the home page of my Internet Service Provider, Comcast does not connect, nor do some other web sites. Yes, I cleared the browser, tried a different browser and a different computer, same results. Curious, www.comcast.COM connects, but www.comcast.NET (with my email) does not connect.

I suspect some domain name server problem.

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Old 09-20-2007, 05:49 AM   #2
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Yes, DNS lookup or router issues are pretty common.

   
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Old 09-20-2007, 07:04 AM   #3
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Another possibility is network problems along the route from you to there.

To test DNS (on a windows box), open a command-line window and type
Code:
ping [domainname]
where [domainname] is to be replaced with the full domain name (without http://) of the target site.

If it tells you the IP address, it resolves. Then try
Code:
tracert [domainname]
to see whether you can get there from here (where you're at).

   
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Old 09-20-2007, 07:15 AM   #4
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IIRC, the same thing works on a Mac (unix) from a terminal window, except you use traceroute instead of tracert

   
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Old 09-20-2007, 09:34 AM   #5
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Quote:
Originally Posted by Steve Rindsberg View Post
IIRC, the same thing works on a Mac (unix) from a terminal window, except you use traceroute instead of tracert
And the same on Linux - and other *nixes.

   
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Old 09-20-2007, 12:36 PM   #6
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Quote:
dthomsen8: Is it possible that some web site connections will be made, and not others?
Oh yeah...had this happen the other day for a couple of hours with my mail.com access...basically, the site was down as I could get to pretty much any other site...

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Old 09-20-2007, 02:20 PM   #7
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And I just had occasion to use my own recipe (see above) with the fontlab site - could not connect: ping showed it resolves, and the tracert is normal, which means either the webserver is down or it's overloaded...

   
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Old 09-20-2007, 02:22 PM   #8
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Quote:
Originally Posted by terrie View Post
Oh yeah...had this happen the other day for a couple of hours with my mail.com access...basically, the site was down as I could get to pretty much any other site...
Not necessarily - unless you do a traceroute you can't tell whether it's that server or a node on the route between you and the server that's causing the problem.

   
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