Internet connection sharing stopped working

[Guest]

I set up ICS last week. I have an XP box with two NICs and another box that
is the client. I used the ICS wizard and set up everything and it worked
flawlessly. Then it stopped working - I couldn't get to the internet from
the client machine anymore.

I noticed that local area connection #1 (to the internet) is not set to be
shared anymore. When i go into "Properties>Advanced" and click on "Allow
other users to connect through this computer's internet connection" I get
the following error:

"Internet Connection Sharing cannot be enabled. A LAN connection is already
configured with the IP address that is required for automatic addressing".

From reading various we pages I think the conflict is over the 192.168.0.1
IP address but I'm not sure how to fix it.

Here is the output of ipconfig /all on my XP machine (the ICS host)

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : domain.actdsltmp
Description . . . . . . . . . . . : 3Com EtherLink Server 10/100 PCI
(3C980C-TXM)
Physical Address. . . . . . . . . : 00-E0-81-03-B8-55
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.4
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1
205.171.3.65

Lease Obtained. . . . . . . . . . : Friday, October 15, 2004
10:23:38 AM
Lease Expires . . . . . . . . . . : Saturday, October 16, 2004
10:23:38 AM

Ethernet adapter Local Area Connection 2:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com EtherLink Server 10/100 PCI
(3C980C-TXM) #2
Physical Address. . . . . . . . . : 00-E0-81-03-B8-56
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Autoconfiguration IP Address. . . : 169.254.34.89
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :

Any help? Thanks

 

[Hans-Georg Michna]

You have a second computer configured for Internet Connection
Sharing or you have a router.

Please describe what you have.

Hans-Georg

 

[pjay]

I set up ICS last week. I have an XP box with two NICs and another box
that
is the client. I used the ICS wizard and set up everything and it worked
flawlessly. Then it stopped working - I couldn't get to the internet from
the client machine anymore.

I noticed that local area connection #1 (to the internet) is not set to
be
shared anymore. When i go into "Properties>Advanced" and click on "Allow
other users to connect through this computer's internet connection" I
get
the following error:

"Internet Connection Sharing cannot be enabled. A LAN connection is
already
configured with the IP address that is required for automatic addressing".

From reading various we pages I think the conflict is over the 192.168.0.1
IP address but I'm not sure how to fix it.

Here is the output of ipconfig /all on my XP machine (the ICS host)

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : domain.actdsltmp
Description . . . . . . . . . . . : 3Com EtherLink Server 10/100
PCI
(3C980C-TXM)
Physical Address. . . . . . . . . : 00-E0-81-03-B8-55
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.4
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1
205.171.3.65

Lease Obtained. . . . . . . . . . : Friday, October 15, 2004
10:23:38 AM
Lease Expires . . . . . . . . . . : Saturday, October 16, 2004
10:23:38 AM

Ethernet adapter Local Area Connection 2:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com EtherLink Server 10/100
PCI
(3C980C-TXM) #2
Physical Address. . . . . . . . . : 00-E0-81-03-B8-56
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Autoconfiguration IP Address. . . : 169.254.34.89
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :

Any help? Thanks

Yeah - I've been here a few times on this - I kind'a sorted it by setting
the offending 192.168.0.1 NIC to "Obtain Address Automatically" - then retry
the ICS setup. Seems as though the NIC card can get 'stuck' with the address
ICS needs.

Worth a try anyway ...
Cheers
PJ