virgin media problems

  Technophobic 21:03 02 Jul 2007

I am trying to connect an extra computer to my flat mates virgin media cable connection but my computer will not recieve the service is there anything i need to pre-install etc?
can't contact virgin media with any ease about this. could anyone help?

  mgmcc 21:17 02 Jul 2007

You *CANNOT* connect two computers simultaneously to the Cable Modem. Virgin Media only allocate one IP address and every computer connected to the internet must have a unique IP address.

Therefore, you must either set up "Internet Connection Sharing" in your flat mate's PC and connect with a "crossover" ethernet cable to his PC (or "wirelessly) or else install a *ROUTER*.

With a router, it is the router which connects to the internet and gets the single IP address. It in turn allocates IP addresses to the computers networked with it using one of the address ranges reserved for use in Local Area Networks, most commonly a range. It then "routes" the internet traffic to the correct IP address in the LAN.

  mgmcc 21:19 02 Jul 2007

To create a wired network for Internet access and File/Printer sharing, you have essentially two options:

1) Install a Network Adapter in each PC (if not already installed) and connect them directly with a crossover CAT5 ethernet cable. “Internet Connection Sharing” is then enabled on the actual Internet connection in the “host” PC and the “client” PC will have Internet access provided the “host” is running and online.

To enable “Internet Connection Sharing” in Windows XP, open the Network Connections folder, right click the actual internet connection (modem connection), select Properties and then the Advanced tab. Tick the box “Allow other network users to connect through this computer’s Internet connection”.

When you enable "Internet Connection Sharing" on the Internet connection, it automatically configures the network adapter used for your "Home Network Connection" with the IP address and subnet mask If you have more than one adapter available for this purpose, e.g. both a "Local Area Connection" and a "Wireless Network Connection", you will have a drop down list from which to select the appropriate adapter. The "Client" PC's Local Area Connection should be set to get its IP address automatically, which it does by DHCP from the "Host" PC. Also, if you run the Zone Alarm firewall in your "Host" PC, the Internet Zone Security level must be reduced from High to Medium or "ICS" traffic will be blocked.

2) The preferred option for connecting more than one computer is to use a broadband Router and, with ADSL, this should be a combined “Router/ADSL Modem”. All networked computers connect directly to the router with ‘straight-wired’ CAT5 ethernet cables.

With a router, it is the router which connects directly to the ISP and not one of the connected PCs. The router in turn allocates the IP addresses to the PCs, using one of the address ranges reserved for Local Area Networks, usually

Either of these options will additionally allow you to run File and/or Printer Sharing across the network.

If you are running software firewalls, these need to be configured to allow access to the networked computers, which may involve adding their IP addresses in a "trusted" section.

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