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Connectivity Issues - DNS???


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11 replies to this topic

#1 bh357

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Posted 25 August 2009 - 02:14 PM

I'm having an issue with an appearant "loss of connectivity" on my desktop computer. The desktop is running XP and connected to the router with a cat5 cable. From time-to-time, I'll get the "Internet Explorer Cannot display this Webpage" message. Usually restarting the router will fix this for a bit. No issues with a wireless laptop running Vista, or a wireless laptop running XP.

On the desktop (when I'm experiencing the "connectivity" issues):
I can ping the machine itself
I can ping the router
I can access the router from Internet Explorer
I can ping other machines on the network
I can ping an outside IP address (I used 209.85.225.103)
I CAN'T ping an outside domain name (I used "www.google.com" for this)
If I type 209.85.225.103 in the browser (IE) address window, it'll take me to Google's homepage

I have the computer set to "Obtain DNS Automatically"
I have also tried using OpenDNS, with the same issues.

Any advice

Thanks,
bh

Edited by bh357, 25 August 2009 - 02:15 PM.


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#2 ThunderZ

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Posted 25 August 2009 - 02:19 PM

The problem you are experiencing may not be on your end.

But a possible fix if it happens to be machine specific.

start>run> type in cmd. At the flashing prompt in the window that will appear type in ipconfig /flushdns. Note the space between ipconfig and /.

#3 bh357

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Posted 25 August 2009 - 03:26 PM

I tried "ipconfig /flushdns", as well as the winsock reset I had read about elsewhere. After rebooting, I was connected for about 10 minutes then no connectivity.
I also have a Vista laptop connected (wirelessly) through the same router. No issues with the laptop.

#4 ThunderZ

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Posted 25 August 2009 - 03:31 PM

Try going to device manager. Expand the string at "network adapters". Right click on the NIC for you cat5 connection. Go to properties> Power management tab. Make sure there is not a check mark in "allow the computer to turn off this device..."

#5 bh357

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Posted 25 August 2009 - 05:27 PM

Try going to device manager. Expand the string at "network adapters". Right click on the NIC for you cat5 connection. Go to properties> Power management tab. Make sure there is not a check mark in "allow the computer to turn off this device..."


There was no check mark in the box.

#6 ThunderZ

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Posted 25 August 2009 - 06:06 PM

My last couple of questions.

Are there certain sites this happens on or is it any site at random?

Are you sure your PC is malware free?


Ok, one last question. What vers. of IE are you running?

Edited by ThunderZ, 25 August 2009 - 06:07 PM.


#7 bh357

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Posted 26 August 2009 - 05:47 AM

Currently running IE 8.
When I lose connectivity, I can't access any site. Usually power cycling the router restores connectivity.
I have Mcafee installed, and have also run a scan with Malwarebytes within the past week (came back clean). The connectivity issue has been going on for a couple months.

#8 ThunderZ

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Posted 26 August 2009 - 06:17 AM

I have read bits and pieces around the Net that this seems to happen with IE8 on XP machines.

IE8 was written for Vista\Win7 and ported backwards to XP.

Instead of recycling the router have you tied restarting the problem PC?

If you check Services, what is DNS client set to?

#9 bh357

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Posted 28 August 2009 - 07:56 AM

I checked services by launching services.msc from the run window. DNS client is showing with a status of "started", startup type of "automatic" and log on as "network service".
I've tried both restarting the computer, as well as doing a "repair" on the network connection. Both generally bring back connectivity for anywhere from a couple minutes to a half hour.

Will try rolling back to IE 7 next.

#10 hamluis

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Posted 28 August 2009 - 09:46 AM

I would just set the connection up anew, using the Network Connection Wizard in XP.

Your problems may be due to file damage somewhere among the various files which are required for connectiity.

FWIW: The option to repair a connection within XP...has never done anything useful for me :thumbsup:.

Louis

#11 bh357

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Posted 09 October 2009 - 07:55 AM

Still having problems occasionally. I even went so far as to reinstall Windows. Below is the latest diagnostics log. Restarting IE and power-cycling the router restored connectivity.

Last diagnostic run time: 10/09/09 08:44:58 DNS Client Diagnostic
DNS - Not a home user scenario

info Using Web Proxy: no
info Resolving name ok for (www.microsoft.com): no
warn Unrecognized WinSock NSP: mdnsNSP
No DNS servers

DNS failure

info Query [www.microsoft.com] against DNS Server 24.247.15.53, (Type = 0x1, Options = 0x10e8) returns 0x5b4
info Query [www.microsoft.com] against DNS Server 24.247.24.53, (Type = 0x1, Options = 0x10e8) returns 0x5b4
action Automated repair: Renew IP address
action Releasing the current IP address...
action Successfully released the current IP address
action Renewing the IP address...
action Successfully renewed the current IP address
info Query [www.microsoft.com] against DNS Server 24.247.15.53, (Type = 0x1, Options = 0x10e8) returns 0x5b4
info Query [www.microsoft.com] against DNS Server 24.247.24.53, (Type = 0x1, Options = 0x10e8) returns 0x5b4
info Redirecting user to support call



Gateway Diagnostic
Gateway

info The following proxy configuration is being used by IE: Automatically Detect Settings:Disabled Automatic Configuration Script: Proxy Server: Proxy Bypass list:
info This computer has the following default gateway entry(ies): 192.168.1.1
info This computer has the following IP address(es): 192.168.1.100
info The default gateway is in the same subnet as this computer
info The default gateway entry is a valid unicast address
info The default gateway address was resolved via ARP in 1 try(ies)
info The default gateway was reached via ICMP Ping in 1 try(ies)
warn Hostname www.microsoft.com could not be resolved (Error code 0x2afc). Could be either gateway or DNS issue
action Automated repair: Renew IP address
action Releasing the current IP address...
action Successfully released the current IP address
action Renewing the IP address...
action Successfully renewed the current IP address
info This computer has the following default gateway entry(ies): 192.168.1.1
info This computer has the following IP address(es): 192.168.1.100
info The default gateway is in the same subnet as this computer
info The default gateway entry is a valid unicast address
info The default gateway address was resolved via ARP in 1 try(ies)
info The default gateway was reached via ICMP Ping in 1 try(ies)
warn Hostname www.microsoft.com could not be resolved (Error code 0x2afc). Could be either gateway or DNS issue
action Automated repair: Reset network connection
action Disabling the network adapter
action Enabling the network adapter
info Network adapter successfully enabled
info This computer has the following default gateway entry(ies): 0.0.0.0
warn There is no default gateway entry
action Manual repair: Reboot modem
info This computer has the following default gateway entry(ies): 192.168.1.1
info This computer has the following IP address(es): 192.168.1.100
info The default gateway is in the same subnet as this computer
info The default gateway entry is a valid unicast address
info The default gateway address was resolved via ARP in 1 try(ies)
info The default gateway was reached via ICMP Ping in 1 try(ies)
info TCP port 80 on host 65.55.12.249 was successfully reached
info The Internet host www.microsoft.com was successfully reached
info The default gateway is OK



IP Layer Diagnostic
Corrupted IP routing table

info The default route is valid
info The loopback route is valid
info The local host route is valid
info The local subnet route is valid
Invalid ARP cache entries

action The ARP cache has been flushed



IP Configuration Diagnostic
Invalid IP address

info Valid IP address detected: 192.168.1.100



Wireless Diagnostic
Wireless - Service disabled

Wireless - User SSID

Wireless - First time setup

Wireless - Radio off

Wireless - Out of range

Wireless - Hardware issue

Wireless - Novice user

Wireless - Ad-hoc network

Wireless - Less preferred

Wireless - 802.1x enabled

Wireless - Configuration mismatch

Wireless - Low SNR




WinSock Diagnostic
WinSock status

info All base service provider entries are present in the Winsock catalog.
info The Winsock Service provider chains are valid.
info Provider entry MSAFD Tcpip [TCP/IP] passed the loopback communication test.
info Provider entry MSAFD Tcpip [UDP/IP] passed the loopback communication test.
info Provider entry RSVP UDP Service Provider passed the loopback communication test.
info Provider entry RSVP TCP Service Provider passed the loopback communication test.
info Connectivity is valid for all Winsock service providers.



Network Adapter Diagnostic
Network location detection

info Using home Internet connection
Network adapter identification

info Network connection: Name=Local Area Connection, Device=CNet PRO200WL PCI Fast Ethernet Adapter, MediaType=LAN, SubMediaType=LAN
info Network connection: Name=Internet Connection, Device=Internet Connection, MediaType=SHARED ACCESS HOST LAN, SubMediaType=NONE
info Ethernet connection selected
Network adapter status

info Network connection status: Connected



HTTP, HTTPS, FTP Diagnostic
HTTP, HTTPS, FTP connectivity

warn HTTP: Error 12007 connecting to www.microsoft.com: The server name or address could not be resolved
warn HTTPS: Error 12007 connecting to www.microsoft.com: The server name or address could not be resolved
warn FTP (Passive): Error 12007 connecting to ftp.microsoft.com: The server name or address could not be resolved
warn HTTP: Error 12007 connecting to www.hotmail.com: The server name or address could not be resolved
warn HTTPS: Error 12007 connecting to www.passport.net: The server name or address could not be resolved
warn FTP (Active): Error 12007 connecting to ftp.microsoft.com: The server name or address could not be resolved
error Could not make an HTTP connection.
error Could not make an HTTPS connection.
error Could not make an FTP connection.

#12 techextreme

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Posted 09 October 2009 - 09:52 AM

I noticed "warn Unrecognized WinSock NSP: mdnsNSP" in your diag logs. I have a question.

Do you have mDNSresponder installed on your computer? It will come with itunes, quicktime, and bonjour.

Look in your Task Manager for a file named "mdnsresponder.exe". If it's there when your computer will no longer access the internet, try killing it off and see if you can once again access the internet.

You may also want to check your router and see if UPNP service is enabled. If it is, try shutting it off.

If you do see mdnsresponder and killing it allows you to access the internet again without resetting your router or rebooting, Try uninstalling Bonjour and Apple Updater. Reboot and test again.

Hope this helps,

Techextreme

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