"Cannot connect to DNS Server" + Other Net Problems

Hey guys, having a few problems with my internet connection. I'm far from an expert so you'll have to bear with me.

I only get this problem on two wireless networks, either the one at my home, or the one in my University house. I get intermittent internet, it cuts out, sometimes after 10 minutes, sometimes an hour, and the only way to get it back is by resetting the router, and running a diagnose + repair from Network and Sharing Centre and then by Resetting the Wireless Router, which doesn't always fix the problem.

Sometimes I get a "Windows cannot connect to DNS Server" error, and sometimes it just fixes itself.

After a few quick searches, I've tried resetting WINSOCK entries to installation defaults (netsh winsock reset catalog) and reset TCP/IP stack to installation defaults (netsh int ip reset reset.log) but this doesn't seem to have worked.

Here is the results of an iconfig/all on my system:

C:\Users\Matt>ipconfig/all

Windows IP Configuration

Host Name . . . . . . . . . . . . : Matts-Laptop
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : lan

Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . : lan
Description . . . . . . . . . . . : Intel(R) WiFi Link 5100 AGN
Physical Address. . . . . . . . . : 00-22-FA-12-AE-9C
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::a07f:c224:e683:f776%11(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.64(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 24 October 2009 12:18:47
Lease Expires . . . . . . . . . . : 25 October 2009 12:18:47
Default Gateway . . . . . . . . . : 192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 184558330
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-11-4E-CB-2E-00-1D-72-F8-12-7E

DNS Servers . . . . . . . . . . . : 192.168.1.254
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : wistron.com
Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet
Physical Address. . . . . . . . . : 00-1D-72-F8-12-7E
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.Firewall
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 7:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:d5c7:a2d6:1835:678:a29f:2070(Prefe
rred)
Link-local IPv6 Address . . . . . : fe80::1835:678:a29f:2070%12(Preferred)
Default Gateway . . . . . . . . . : ::
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Local Area Connection* 11:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : lan
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 15:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.wistron.com
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes


Please help guys, this is driving me absolutely crazy!

Come on guys, really do need some help, any suggestions?

Wonderful, wonderful.

Cheers for all the help guys.

chill out , i dont think anyone was ignoring you

C:\>ipconfig /flushdns

also disable IPV6

Hey Matty, if your router is a Linksys, check out my posting of about an hour ago.

Matty323F said:

Wonderful, wonderful.

Cheers for all the help guys.

Click to expand...

As my esteemed collegue Archie said its the IPv6. known to cause random drops, slowdowns, slow download speeds, etc. You probably only need it if you are running homegroup.


Check with the university first to be sure. If you dont need it change to workgroup, disable it and it will work.

I do about 30 of these a week and 50% are from IPv6.

Hope this helps

Ken J

Hey guys, I've tried disabling IPv6 and I'm still getting the same problem, except when the internet cuts out, when I do a diagnose+repair, it just simply says "Windows Could Not Find a Problem" and just resetting the router fixes it. Another interesting thing though, sometimes when I'm downloading via a Torrent program, the download will continue even though I cannot browse the web... =/