Solved

Configuring a computer for ICS from an existing peer to peer network

Posted on 2004-04-20
8
231 Views
Last Modified: 2010-03-18
I have a peer-to-peer network set up with about 12 computers.  Each computer currently has a static IP address and we connect to the Internet via a DSL modem connected directly to our hub.  The computers are running Windows 2000 Pro or XP Pro and have Norton Internet Security (including anti-virus).  We are switching to a new DSL provider with a single static IP.  I have installed a second ethernet card in a system with 2000Pro for use as the ICS host (referred to as file server) and reconfigured the card to connect to the new DSL modem.  I can access the Internet and email from the file server.  I’ve configured this computer for Internet sharing including configuring the default ports.  I’ve taken 2 of the other computers, reconfigured the TCP/IP for automatic IP addresses, and can access the file server.  I’ve reconfigured Norton to allow access for the new IP address ranges. I’ve even moved the 3 computers for this test to a separate hub to isolate them from the existing network.

Problem:

I cannot access the Internet from the other computers.  From these computers, I can ping (get a response from a ping) both cards on the file server but cannot ping the gateway or the DNS servers as I can from the file server.  I’ve disabled the Norton temporarily but it doesn’t help and I don’t want to run my file server without a firewall.

Questions:

Even though I’ve disabled Norton’s on all systems, is there something that could be running in the background that is still blocking the connection?
Should I completely remove all network connections from all machines and start over as if it were a new network since the original network was configured as peer-to-peer?
Is there something else I missed?
0
Comment
Question by:DWG57
  • 4
8 Comments
 
LVL 57

Expert Comment

by:Pete Long
ID: 10870576
you dont say what OS the clients are?

To Troubleshoot ICS
http://www.practicallynetworked.com/sharing/ics/ics_troubleshoot.htm
0
 
LVL 57

Expert Comment

by:Pete Long
ID: 10870581
if there are any XP machines in the equation ensure ICF is disabled on them

Windows XP Built in Firewall (ICF)

The (Internet Connection Firewall) that ships with XP while not a bad thing us usually the cause of most home networking "woes"

You should get a reliable Firewall if you spend any time online

***Not Free***
Zone Alarm http://www.zonelabs.com/store/content/home.jsp
Norton http://www.symantec.com/sabu/nis/npf/
Black Ice http://blackice.iss.net/

***To Disable Windows XP Firewall***

1.  Open Network Connections (Click Start, click Control Panel, and then double click Network Connections.)
 
2.  Click the Dial up, LAN or High–Speed Internet connection that you want to protect, and then, under Network Tasks, click Change settings of this connection.
 
3.  On the Advanced tab, under Internet Connection Firewall, select the following:  Clear the Protect my computer and network by limiting or preventing access to this computer from the Internet check box. This disables the firewall, your computer and network are then vulnerable to intrusions.
0
 

Author Comment

by:DWG57
ID: 10870978
The ICS was set up on a system running 2000 Pro and of the 2 clients, one was 2000 Pro and one was XP Pro
0
 
LVL 57

Accepted Solution

by:
Pete Long earned 125 total points
ID: 10871075
0
 
LVL 57

Expert Comment

by:Pete Long
ID: 11316749
your call?
0

Featured Post

6 Surprising Benefits of Threat Intelligence

All sorts of threat intelligence is available on the web. Intelligence you can learn from, and use to anticipate and prepare for future attacks.

Join & Write a Comment

This is the first one of a series of articles I’ll be writing to address technical issues that are always referred to as network problems. The network boundaries have changed, therefore having an understanding of how each piece in the network  puzzl…
Trying to figure out group policy inheritance and which settings apply where can be a chore.  Here's a very simple summary I've written which might help.  Keep in mind, this is just a high-level conceptual overview where I try to avoid getting bogge…
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, Just open a new email message.  In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
This video explains how to create simple products associated to Magento configurable product and offers fast way of their generation with Store Manager for Magento tool.

707 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now