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Intermittent connection and/or DNS problem


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#1 Entropy2

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Posted 02 April 2010 - 06:30 PM

I have been struggling with an intermittent data connection for over a year and am utterly confused, bewildered and befuddled at how to fix it.

Problem:
My internet connection (and speed) works great…when it works. About every fifth or tenth page I try to load, the page hangs… with the status message at the bottom (IE8) saying “waiting http…….”. Hitting stop and reload three or four times will sometimes get it working again. Sometimes I need to hit back and then restart the page…and it loads fine. Failing that, I would need to close the browser and restart the session which almost always fixes things. I’ve found almost no correlation between the hanging and the type of page being loaded

This problem isn’t limited to browsing, as my Outlook Express when asked to send/receive will hang most times, until it times out, at which time I would need to cancel and hit send/receive again. Additionally, the Playstation 3 will drop it’s connection randomly… although much less frequently than the browser or PC.


My Home Network:

• Comcast cable modem, with no less than 6Mb/s down, 2 Mb/s up
• DLink DIR655 802.1N router
• Three PC's, all running Windows XP SP3 and latest patches. Each with AVG free Virus and Zone Alarm firewall.
• Two PC’s are hard wired to router, one has both wireless and wired (docked).
• Various other wireless devices (itouch, Playstation, etc.)
• All PC’s are virus scanned often with AVG, Defender, SCI, Kasperski, Superaintispyware, Malwarebytes, ATF, Panda on-line and others
• Browsers: IE8 and Firefox


Steps Taken:
• Replaced router 3 times.
• Replace cable modem 3 times
• Taken router out (direct modem connection)
• Changed all cat5 cables
• Reset TCP/IP stack
• Reset Winsock
• Clear cache, history, cookies, etc every session
• Run negative DNS patch (e.g. no negative DNS caching)
• Confirmed all IP setting with ISP
• Asked neighbors if they experience problems (no problems reported)
• Shut off Zone alarm. AVG 9 doesn’t allow it to be turned off.
• Cut off chicken head and sprinkled blood on wires
• Checked router logs and modem logs for dropped packets...few found

Any thoughts on what else i could try or where the problem may lie??

Thanks

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#2 hamluis

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Posted 02 April 2010 - 06:50 PM

Well...I would have looked at the NIC...long before I replaced a router or modem.

If this problem is common to all 3 systems using the router...I would have to look at the ISP, I suppose. You've already replaced the two logical suspects (modem, router) multiple times.

A year is a long time to have this type of problem on three different systems.

Louis

#3 cryptodan

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Posted 02 April 2010 - 06:53 PM

Can you log into your router take a screenshot of the Status page it should show the DNS information and the same with command prompt and ipconfig /all

#4 Entropy2

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Posted 03 April 2010 - 01:05 PM

DNS status and IPconfig screen shots attacehed.

Attached Files


Edited by Entropy2, 03 April 2010 - 11:46 PM.


#5 cryptodan

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Posted 03 April 2010 - 01:28 PM

Try using your ISP DNS Servers instead of OpenDNS.

#6 Entropy2

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Posted 03 April 2010 - 11:16 PM

If I understand correcty, the Primary and secondary IP's I'm using are openDNS IP's rather than Comcast. This was a 'fix' offered by Dlink Tech support that I forgot to undo (I was wondering how they knew these addresses). I will undo it and let you know if I see any change, but I typically DO use what Comcast recommends (www.comcast.net). I have also put in the direct Comcast IP's, but Comcast changes their IP often ( like every few weeks).

Attached Files


Edited by Entropy2, 03 April 2010 - 11:58 PM.


#7 cryptodan

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Posted 04 April 2010 - 07:31 AM

Comcast does not change their DNS IP addresses on a weekly basis. They are static. If they do change, then they will send a letter out informing you of such action.

I should know i had Comcast from 2002 to end of 2008 and only one time in that 6 years that they had changed their DNS.

#8 Entropy2

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Posted 05 April 2010 - 02:23 PM

OK, my mistake. That was the line they gave me when I asked for the actual IP's.

Back to the problem at hand....any other thoughts?? Should I be posting this in the Networking forum?

Thanks for the help

#9 cryptodan

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Posted 05 April 2010 - 02:25 PM

Stop using OpenDNS and call Comcast to get your DNS IP's.




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