Connected locally (LAN) but not to internet

Question

I have a wireless i-net connection using WRT54G2 Linksys router.

I have never problems being connected to the local network, however the i-net connection seems to be dropping pretty frequently and I am not sure why. In other words, I am connected locally with no internet access.

There are full days when I am online and I have no problems whatsoever but other days when the i-net connection drops a couple of times a day. As you can imagine, it's very annoying having to unplug the router and the modem to get everything back up and running.

Once the modem and router are restarted, I always get connected to the i-net without problems.

Now, I have been trying to figure out the cause of it unsuccessfully.

I compared the records of ipconfig /all when the i-net connection was down vs when I am connected to the i-net.

The records are identical except the last part...

----------------- I-net connection working: 

Tunnel adapter Local Area Connection* 9:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e76:246b:1aaa:9c03:a390(Preferred)
   Link-local IPv6 Address . . . . . : fe80::246b:1aaa:9c03:a390%15(Preferred)
   Default Gateway . . . . . . . . . : ::
   NetBIOS over Tcpip. . . . . . . . : Disabled

----------------- I-net connection NOT working: 

Tunnel adapter Local Area Connection* 9:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

I have no idea what "Tunnel adapter Local Area Connection* 9:" does..

Can someone please shed some light on this issue? More specifically, what "Tunnel adapter Local Area Connection* 9" is for and whether it could be the cause of my i-net connection dropping on regular basis?

Thank you in advance!

PS: To save time... here is the rest of my ipconfig /all info

Windows IP Configuration

   Host Name . . . . . . . . . . . . : v-PC
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : phub.net.cable.rogers.com

Wireless LAN adapter Wireless Network Connection 2:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft Virtual WiFi Miniport Adapter
   Physical Address. . . . . . . . . : 26-17-FE-AA-CD-66
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Local Area Connection:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Realtek PCIe FE Family Controller
   Physical Address. . . . . . . . . : C8-0A-A9-1C-EF-79
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wireless Network Connection:

   Connection-specific DNS Suffix  . : phub.net.cable.rogers.com
   Description . . . . . . . . . . . : Qualcomm Atheros AR9285 802.11b/g/n WiFi Adapter
   Physical Address. . . . . . . . . : C4-17-FE-AA-CD-66
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::cfd:a772:9ea4:865f%11(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.100(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Saturday, November 17, 2012 11:21:04 AM
   Lease Expires . . . . . . . . . . : Sunday, November 18, 2012 12:10:19 PM
   Default Gateway . . . . . . . . . : 192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DHCPv6 IAID . . . . . . . . . . . : 197400574
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-E3-2F-1C-C8-0A-A9-1C-EF-79

   DNS Servers . . . . . . . . . . . : 64.71.255.198
   NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.phub.net.cable.rogers.com:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : phub.net.cable.rogers.com
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 9:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e76:246b:1aaa:9c03:a390(Preferred)
   Link-local IPv6 Address . . . . . : fe80::246b:1aaa:9c03:a390%15(Preferred)
   Default Gateway . . . . . . . . . : ::
   NetBIOS over Tcpip. . . . . . . . : Disabled

Answer 1

I have no idea what "Tunnel adapter Local Area Connection* 9:" does..

It provides IPV6 support.

whether it could be the cause of my i-net connection dropping on regular basis?

No, that is a fault in your router or a problem with your modem, ADSL-line or cable-connection or ISP.

Instead of unplugging everything, try connecting to the router's administration web-page. From there you should be able to get it to reconnect or to reboot.

If the problem persists, I'd try calling your ISP support and/or changing the ADSL filter, cables or router.

Answer 2

Most likely it's your WRT54G2 Linksys.

From my experience they fail a lot (especially as they continue to get older), and they fail just like you're describing. Try a new router.