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Home » Forums » Forum Archives » Networking and Internet Sharing » Topic # 10

lizard Mar-04-00 04:28 AM
Hi, I read your guides on how to make a network and share the internet connection using cable modem, and they are great!!! However, I am still not sure what to do in my case, so can u give me some advice? I have 2 computers that I wanted to share the connection. My cable company will only assign one IP address, any addition IP will incurr additional charge. I asked several computer stores Some told me to network the two computers and apply for one more IP address. Others told me to make a network, but the one with the cable modem to be a server, then the addition IP address is not needed.
Of course, if making a server means lower cost, I will choose that option, but what kind of equipment do I need to make two computers into a server connection? From your guide, I know networking two computers just need 2 NIC's and network cable, then win98se( on both machine) will be able to make the connection. But what extra do I need to make one a server? Do I really need a server to have two IP addresses (without paying the cable company)? Or the ICS will assign a second IP address even though the cable computer assigns only one? what should I do now, I confused myself as I am writing, anyway, excellent job on the guides.......

lbyard Mar-04-00 04:10 PM
In response to message 0
LAST EDITED ON Mar-04-00 AT 04:24 PM (GMT)

Install a second network adapter in the computer attached to the cable MODEM (the cable MODEM uses the other adapter and and it will probably be installed when your cable company installs the MODEM--ask them for it if they start to install the MODEM using your adapter). Windows 95, 98, NT, and 2000 will support more than one network adapter in a computer. Install a third network adapter in the other computer. Connect the two computers together with a crossover cable (or hub and two straight-thru cables--which costs a lot more). I can make a crossover cable for you. Click Products, Cables. Network the two computers with the TCP/IP protocol. Install Internet Connection Sharing (ICS) Software (which, in most cases, is a NAT or Network Address Translator). Windows 98 Second Edition and Windows 2000 has ICS built-in and will provide ICS capablities to a local area network with Win 95 and 98 computers. However, you may want to take a look at SyGate--which, in my opinion, is better than Win 98 SE ICS--if you are going to use ICS a lot, play Internet games, or pariticapate in conferencing. Technically, you do not need a second IP address. A NAT translates, back and forth, the local IP addresses (,,, etc. assigned to the computers on a local area network into the single IP address assigned to the cable MODEM. Check your cable company's web site for their policy on sharing a connection and make your own decision on that matter. See http://duxcw/digest/guides/network/index.html for relevant Dux Computer Digest Networking How to articles and Reviews. Larry

lizard Mar-04-00 06:30 PM
In response to message 1
LAST EDITED ON Mar-04-00 AT 06:41 PM (GMT)

LAST EDITED ON Mar-04-00 AT 06:40 PM (GMT)

Hi, thank you for your reply, so u mean after I networked two computers (peer to peer), I can either use sygate or ICS? So I can choose either one to install? So I do not need to make one into a server, and I can still get 2 IP addresses? It is because everyone told me I cannot use one IP address for two machines!

Also, I saw it on the product page that you have Aopen NIC's, the cable company installed a AOpen PCI 10 Mbps NIC into my computer, ALN-201, and there are two connectors, one is 10base-T RJ45, and another one is 10Base2 BNC, the RJ45 is used to connect to the CM, what is the other one used for? Do i still need another NIC ? If so, do I need the same second NIC or can use others? Which one u recommand? Also, do you ship to Canada?

Thank you

lbyard Mar-04-00 07:26 PM
In response to message 2
"Everyone" is both right, wrong, and confussed... You only need one IP from the cable company. Each computer will have a unique IP assigned locally by ICS (the cable company doesn't see these local IPs; it "thinks" it is dealing with one network node/computer: the NAT). The NAT interfaces the local IPs to the single IP assigned by the cable company's DHCP server to the cable MODEM. The NAT translates packets (IP headers) sent back and forth between the two networks. That is, altogether, you will have three IPs: the one assigned to the cable MODEM and the two local IPs the ICS software assigns to your computers (usually 192.168.01 and You DO need two NICs in the computer which is connected to the cable MODEM because you will be interfacing with two networks which cannot talk to each other through the same NIC. Picture ICS as a software gateway which can talk to, and translate between both networks. The BNC connector (round one) on the NIC the cable company installed allows the card to connect to a twisted pair network (RJ-45) OR a thinwire coaxial (BNC) network. Both are physical forms of an Ethernet. The card do both at the same time. The 10 Mhz board is old, but is sufficient for a cable MODEM which is much slower than 10 Mhz. You can use different NICs for your Local Area Network (LAN). Get two quality 100 Mhz Ethernet boards like the D-Link DFE-530TX (http://duxcw/digest/Reviews/Network/dlink/dfe530tx.htm) or ALN-320 (http://duxcw/digest/Reviews/Network/acer/aln320.htm)and connect your computers together with a crossover cable. The cable can be up to 100 Meters long. You will need a hub and straight-thru cables to connect more than two computers. If you already have Win 98 SE, you can use it to share the cable MODEM and cable MODEM IP address. If you don't, or you have more demanding requirements, such as conferencing and network games, skip the Win 98 SE (not a big deal anyway)upgrade and use the money for SyGate; its better. I think we can ship to Canada. See if my shopping cart will take your postal zone. If not, E-Mail me (see Contact info) and we will see if arrangements can be made. We will be closed Sunday and Monday (death in the family). Larry

lizard Mar-04-00 07:49 PM
In response to message 3
Thank you for your reply, I am sorry to hear the sad news, give my best regard to you and your family. I still have one question, what is the difference between using Win98se ICS and Sygate or wingate? How come Sygate is used for more demanding functions? And is Wingate any good?

I will try to see if the shopping cart will allow me to put in my postal code...

lbyard Mar-04-00 08:10 PM
In response to message 4
The link in my first response should have been http://duxcw.com/digest/guides/network/index.html.
SyGate is just plain better. Read my review on SyGAte and run over to Microsoft's support data base and search with Windows 98 Se and ICS and you will see why. Forget Wingate. Although I have not tried the latest version of that software, the version I did try some time ago was terrible! Larry

somms Jul-29-00 09:15 PM
In response to message 3
Actually, if you have a hub, you can use Vicom's Softrouter to run NAT with only one NIC in the server. It binds two IPs to one card, making it very easy to network multiple machines behind it.
In plain english, you hook the cable modem to the uplink on the hub, and attach the rest of the machines (including the server) to the hub, and run Softrouter on the server machine. It works very well, and does not force the server to use NAT. It configures everything for you, and also allows you to edit the configuration. I would suggest turning off DHCP if you use a cable modem, as that could get you in serious trouble with fellow users, not to mention the cable company.

money4 Apr-04-00 02:05 AM
In response to message 0
LMAO I see and hear this question every day since I am the associate engineer for a cable modem company out in Philadelphia,PA. 1st thing you should know which I am sure your aware of is that networking of the cable modem in the home is against all our policies and aggreements when you signed online. Second that the reason all these cable modem operators are now Bandwidth limiting because to many people are running networks and multiple machines in their home off 1 cable modem. If you pay the couple extra bucks that allows us to configure you modem to properly allocate bandwidth to all machines in your home. Now of course I know the answer to your question but sorry that be a conflict of interest if I gave away the very simply and cheap way of cheating the cable company out of a few bucks a month. Also dont think no one is watching we run program/ scanning programs that tell us who is sucking all the bandwidth up and who is running servers!!!

Have Fun

lbyard Apr-04-00 02:02 PM
In response to message 6
My articles do say to check the cable company's policy on sharing a cable MODEM. I certainly agree that users should not attempt to put a server on the cable. My cable bill at home just went up again. Larry

lizard Apr-04-00 10:12 PM
In response to message 6
Hi, lucky I am in Canada, not in Phil, I don't think my cable company have the policy to restrict networking of the cable modem. I currently have 2 computers at home that needed to go online. The tech rep that installed my cable modem told me I can network myself, either I pay 10 bucks more to get another ip address or use 3rd party software to use ip sharing.

lbyard Apr-05-00 06:52 PM
In response to message 0
First check you cable company's policy on sharing an Internet connection. If you then decide to share the connection, you need to network the two computers per the How to articles. You will need two network adapters in the computer with the network connection, one for the Internet (usually provided by the cable company) and one for the network to the other computer. Of course, you will need a third network adapter for the client computer. Then you must decide what software to use to implement Internet Connection Sharing. Windows 98 SE ICS works OK for average browsing and file donwloading. SyGate installs and works better and should be used if you are going to play Internet games and do conferencing. See http://duxcw.com/digest/Reviews/Network/sygate/sygate.htm for a review of SyGate. ICS and SyGate are NATs or Network Address Translators. They assign local IPs to client computers and translate between those IP's and the single IP assigned to the network adapter which connects to the Internet. It should become clear during or after you install the software. Larry

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