Windows 7 - Possible solution for unidentified network access

Hi! i did 2 installation of Windows 7 (1 clean and other upgrade) both resulting in "unidentified network access". Looked all over the internet for solution and tried all of them but none worked. I am having Realtek RTL8139/810x Family Fast Ethernet NIC. In the end after almost giving up all hope and possible return to vista, i tried the following

1.Right Clicked Local Area Connection
2.Clicked Configure
3.Advanced Tab
4.Highlighted Network Address and changed value by entering random 12 alphanumeric characters (i used 02EF22FD2310 from the top of my mind)
5. Click OK

and whoala immediately got connected to the net

Below is the ipconfig /all output before it got solved

Windows IP Configuration
Host Name . . . . . . . . . . . . : HomePC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : lan
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : lan
Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Ethernet NIC
Physical Address. . . . . . . . . : 00-00-00-00-00-00
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.1.66(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Wednesday, June 10, 2009 6:04:01 AM
Lease Expires . . . . . . . . . . : Thursday, June 11, 2009 6:04:00 AM
Default Gateway . . . . . . . . . : 192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DNS Servers . . . . . . . . . . . : 192.168.1.254
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter isatap.lan:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : lan
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes


After trying the above solution the following is the output

Windows IP Configuration
Host Name . . . . . . . . . . . . : HomePC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : lan
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : lan
Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Ethernet NIC
Physical Address. . . . . . . . . : 02-EF-22-FD-23-10
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::a5e1:2458:15b7:1160%17(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.64(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Wednesday, June 10, 2009 6:40:53 PM
Lease Expires . . . . . . . . . . : Thursday, June 11, 2009 6:40:53 PM
Default Gateway . . . . . . . . . : 192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 285212672
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-11-BB-BE-CC-00-00-00-00-00-00
DNS Servers . . . . . . . . . . . : 192.168.1.254
NetBIOS over Tcpip. . . . . . . . : Disabled
Tunnel adapter isatap.lan:
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 Teredo Tunneling Pseudo-Interface:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Teredo Tunneling Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e50:34a0:3f6e:c169:32d9(Preferred)
Link-local IPv6 Address . . . . . : fe80::34a0:3f6e:c169:32d9%20(Preferred)
Default Gateway . . . . . . . . . : ::
NetBIOS over Tcpip. . . . . . . . : Disabled


Hope this will solve your internet access problem

Cheers

I ran into this on a second adapter after a fresh 7(64) installation. I read your solution, omar, and by jove it worked. thank you, sir. i used the numbers from your post, btw I thought i would confirm, since this is rather wonky behavior and could have many people scratching their heads for hours.

You should also state in the post that any letters used in the 12 alpha-numeric code shouln't go above the letter 'F'. So letters can range from A to F in otherwords.

Am glad it's working. Your right Generator. Thanks

lol i have seen this many things have never really thought about chaning the network card mac address LOL

dont know why entering the binary phony mac address would fix this, cuz thats what you coincidentally did - all the while in the first setup, it looks like you had IPv6 disabled, and it re-enabled afterwards. Basically, in its buggerness, it looks as tho you have done something like a "clone mac address". I'm going to go out on a limb, and depending on what all you do with your pc, adpater, and how many adapters one would be running at the same time, you may run into problems. You may still run into an issue down the road even with the 1 adapter.

So in "theory" that adapter has TWO mac addresses....... things that make you go hmmmm. So possibly in another theory/brainstorm with this scenario, why couldnt you clone the mac address of your router, then hook that adapter/mac to a loop, or in other words, manage traffic per the router mac, via the clone adapter mac. Funky, and probly not possible, but it just makes one think that this would turn more problems later, rather more than answers.

I also want to say that the disabling of the IPv6 could have been a factor of play in in this scenario. Also the fact that you had your gateway configured as 192.168.1.254, is that your router ip, and how is your network setup exactly, how many routers?

Have you tried running static versus dhcp?

Hi Digger,
Yea my router ip is 192.168.1.254. I've just got 1 router. I did try running static vs. DHCP but it didn't working. With regards to disabling the ipv6. Well... I was trying all possible solution then finally tried the phony mac address which solved my problem. Later i enabled ipv6 to ensure the problem doesn't recur. So in the end i concluded that if ipv6 is enabled or disabled didn't matter on my m/c.
So far since the solution, i've not encountered any network error nor has it effected the performance.

I know it's strange but it works.

I tried this, but it did not work for me.
Good find though.

'Just throwing my two cents in.

what does it mean when you change the value of your network address??

Yupper: Same problem upgrading in place from Vista HP to W7HP and this fixed it.

THANK YOU!!!!!

Ted