[Q] Peer-to-peer with Windows 2000 + Internet Connection Sharing

[Wim VAN PAEPEGEM]

Dear all,

I have a home computer with Windows 2000 SP4 installed and an ADSL USB
modem to dial-up to the Internet. My laptop from work has Windows XP
Professional SP2 installed. If I bring home my office laptop, I would
like to share files between these two computers and share the ADSL
internet connection of my home computer.
I have no hub, but a crossover UTP cable between the Ethernet cards of
both computers.
I have several questions:
1) do you need a hub for this set-up, or can I manage with the crossover
cable ?
2) before, I used the NetBEUI protocol to share files between two
Windows 2000 computers, but this protocol is not supported anymore. If I
connect now my Windows 2000 home computer to my Windows XP office laptop
through the crossover UTP cable, my Windows XP laptop does not find my
home computer. I have switched off the Windows XP firewall.
At work, my office laptop is configured for DHCP.
How can I take the first step to share files ?
3) how do I setup the internet connection sharing ? The Internet
connection sharing between my home computer and my office laptop should
go through the LAN connection with the crossover UTP cable, but if my
ADSL modem is active, my "Network and dial-up connections" window in
Windows 2000 shows also a LAN connection "ATM connection" for my ADSL
line. Then there is the other "Local Area Connection". Which ones do I
need to share ?
Which TCP/IP settings do I need for my Windows XP office laptop ?

I already searched through the newsgroups and the website
practicallynetworked.com, but I am afraid I need a more
easy-to-understand description of the different steps I should take.
Can anybody give some suggestions or point me to a relevant website ?

Best regards,
Wim Van Paepegem
(e-mail address removed)

 

[Robert L [MS-MVP]]

Before you do any things, it is better to have your company administrator's permission to make the changes.

1. Yes, you can use crossover cable.
2. TCP/IP should work without installing NetBEUI (even you can but you should not).
3. You can setup ICS for Internet Connection Sharing.
this how to may help,

How to setup Windows ICS To setup a win9x (in our case) as ICS client to access the internet, you need to do two things. network settings and internet option settings. ...
www.howtonetworking.com/Windows/ics.htm


Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com

Dear all,

I have a home computer with Windows 2000 SP4 installed and an ADSL USB
modem to dial-up to the Internet. My laptop from work has Windows XP
Professional SP2 installed. If I bring home my office laptop, I would
like to share files between these two computers and share the ADSL
internet connection of my home computer.
I have no hub, but a crossover UTP cable between the Ethernet cards of
both computers.
I have several questions:
1) do you need a hub for this set-up, or can I manage with the crossover
cable ?
2) before, I used the NetBEUI protocol to share files between two
Windows 2000 computers, but this protocol is not supported anymore. If I
connect now my Windows 2000 home computer to my Windows XP office laptop
through the crossover UTP cable, my Windows XP laptop does not find my
home computer. I have switched off the Windows XP firewall.
At work, my office laptop is configured for DHCP.
How can I take the first step to share files ?
3) how do I setup the internet connection sharing ? The Internet
connection sharing between my home computer and my office laptop should
go through the LAN connection with the crossover UTP cable, but if my
ADSL modem is active, my "Network and dial-up connections" window in
Windows 2000 shows also a LAN connection "ATM connection" for my ADSL
line. Then there is the other "Local Area Connection". Which ones do I
need to share ?
Which TCP/IP settings do I need for my Windows XP office laptop ?

I already searched through the newsgroups and the website
practicallynetworked.com, but I am afraid I need a more
easy-to-understand description of the different steps I should take.
Can anybody give some suggestions or point me to a relevant website ?

Best regards,
Wim Van Paepegem
(e-mail address removed)

 

[Wim VAN PAEPEGEM]

Dear Robert,

Thank you very much for your prompt response. I have followed the
instructions, but it does not work :-( (although there is progress !).

First I have checked the ADSL connection on my home computer (before
connecting my laptop through the crossover cable). It looked like this:

C:\>ipconfig /all

Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : wisi
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Cable Disconnected
Description . . . . . . . . . . . : SiS 900-Based PCI Fast
Ethernet Adap
ter
Physical Address. . . . . . . . . : 00-0C-6E-07-27-45

PPP adapter ADSL USB Modem Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
Physical Address. . . . . . . . . : 00-53-45-00-00-00
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 217.136.121.162
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 217.136.121.162
DNS Servers . . . . . . . . . . . : 195.238.2.21
195.238.2.22


Next, I have connected the crossover UTP cable and I have shared the ATM
connection. I have rebooted the ICS host and then the ipconfig output
looked like this:

C:\>ipconfig /all

Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : wisi
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : SiS 900-Based PCI Fast
Ethernet Adap
ter
Physical Address. . . . . . . . . : 00-0C-6E-07-27-45
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . :

PPP adapter ADSL USB Modem Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
Physical Address. . . . . . . . . : 00-53-45-00-00-00
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 80.201.233.50
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 80.201.233.50
DNS Servers . . . . . . . . . . . : 195.238.2.21
195.238.2.22

Next I have rebooted the laptop (Windows XP) and the LAN connection
indeed showed enabled. The ipconfig output on the laptop was as follows:

C:\Documents and Settings\Administrator>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : leonardo
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom NetXtreme 57xx
Gigabit Controller
Physical Address. . . . . . . . . : 00-15-C5-15-9D-1F
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.69
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1
Lease Obtained. . . . . . . . . . : Tuesday, August 08, 2006
7:04:13 PM
Lease Expires . . . . . . . . . . : Tuesday, August 15, 2006
7:04:13 PM

Ethernet adapter Wireless Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : Intel(R) PRO/Wireless
3945ABG Networ
k Connection
Physical Address. . . . . . . . . : 00-13-02-BC-7C-B2


If I searched for the other computer by IP-address in Windows Explorer,
I managed to browse files on the other computer (it didn't work first,
but my ZoneAlarm firewall had refused the connection).
So far, so good. However, when I start Internet Explorer on my laptop, I
cannot open any websites (although I switched off the Windows XP firewall).

So, sharing files is ok, but sharing the internet connection does not
work. I wonder if it has anything to do with the following:
The ICS host (the Windows 2000 machine) allows me to share the ATM
connection directly, but if I try to share the ADSL USB connection, it
does not work.
In the "Network and dial-up connections" dialogue, I see the following
lines:

Name Type Status
------------------------------------------------------------
ADSL USB modem connection Dial-up Connected
ATM Connection LAN Enabled
Local Area Connection LAN Enabled

So, the ATM connection is shared, but if I right-click on the ADSL USB
modem connection and I try to enable ICS for the local network "ATM
Connection", the message is:
"Internet Connection Sharing is currently enabled for connection "ATM
Connection". It will now be enabled for connection "ADSL USB Modem
Connection" instead".
If I click OK, I get the error message:
"Cannot enable shared access. Error 783: Internet Connection Sharing
cannot be enabled. The LAN connection selected as the private network is
either not present, or is disconnected from the network".

I also tried the other option: to share the ADSL USB modem connection
for the local network "Local Area Connection". Then there is no error
message, but accessing websites on the laptop, does not work either.

Another reason that I thought of, is that the "Local Area Connection" on
the Windows 2000 ICS host has no DNS servers defined. Therefore I tried
to access web servers on my laptop by their IP address, but that does
not work either.

Do you have any idea what could be the reason ?

By the way, if I want to share files and I search for the laptop, I
first have to check his IP-address, because one time it is 192.168.0.69,
and the other time it is 192.168.0.120.
Is there a way to address both computers by their names (wisi and
leonardo) instead of searching for their IP-address in Windows Explorer ?

Best regards,
Wim
(e-mail address removed)

 

[Wim VAN PAEPEGEM]

Dear Robert,

In the mean time, I have tried out some things, and now surfing websites
works, but I do not understand why.
Yesterday, I installed a Virtual Private Network on my office laptop to
connect to the server at work. When I tried out the Internet Connection
Sharing again this morning and I started Internet Explorer on my office
laptop, he asked me to dial-up the VPN connection. I agreed to do so,
and guess what, I could surf to any site I wanted to.
So, strangely enough, my office laptop needs the VPN connection to
"recognize" the Internet Connection Sharing. And the VPN connection is
definitively running through the crossover cable. If I disconnect the
cable, I loose my Internet connectivity.
I then tried to define a new VPN connection with the IP address of the
server being 192.168.0.1 (the IP-address of my home computer), but that
does not work.
Do you understand how this works, and can it give an indication how it
should work without the VPN connection.
My ipconfig output on the office laptop now looks like:

C:\Documents and Settings\Administrator>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : leonardo
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom NetXtreme 57xx
Gigabit Controller
Physical Address. . . . . . . . . : 00-15-C5-15-9D-1F
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.120
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1
Lease Obtained. . . . . . . . . . : Wednesday, August 09, 2006
09:48:03
Lease Expires . . . . . . . . . . : Wednesday, August 16, 2006
09:48:03

Ethernet adapter Wireless Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : Intel(R) PRO/Wireless
945ABG Network Connection
Physical Address. . . . . . . . . : 00-13-02-BC-7C-B2

PPP adapter UGent:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
Physical Address. . . . . . . . . : 00-53-45-00-00-00
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 157.193.1.53
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 157.193.1.53
DNS Servers . . . . . . . . . . . : 157.193.40.42
157.193.71.1

Best regards,
Wim