Hub / Multiple IP Internet Connection Sharing with cable modems and dsl modems

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HUB/SWITCH with Multiple IP address'

Broadband providers like cable modem and DSL companies always suggest getting multiple IP address’ to connect multiple computers to their modem. This may work fine for surfing and email, but can be a huge headache and security risk for sharing files and printers. Of course, the broadband providers do not tell you this because they usually get to charge you extra money for each computer this way. This article will explain why this is a bad idea.

Most broadband companies will help you get multiple computers on the Internet by selling you additional IP address. You will need a hub or a switch between your cable modem and computers but little else is needed. Both computers can get to the Internet, but the whole Internet can get to both of your computers too!

When file sharing is enabled, Microsoft windows ‘broadcasts’ the fact that you have files and printers to share. When ‘bound’ to TCP/IP, this information is available to the whole world! Hackers are always scanning the Internet for Microsoft file and print shares on the Internet. You can enable a password on each of your shares, but it is VERY easy to forget to do this.

Worse still, if your computers were given IP address’ by your ISP that are on different logical networks, or subnets, then your computers will be unable to easily see each other in your network neighborhood. If you are on a cable modem, your neighbors might be able to see your computers easier than you can! ARGH!

Some web sites say that the best way to deal with this problem is to install NetBEUI to share files and printers. The problem with this is two fold. 1) your neighbors may STILL be able to see your file and print shares and 2) your file copy traffic is not only sent between your computers, it is sent out over the broadband modem! Copying files can become VERY slow and unreliable. Often large files become corrupted or fail to copy with a network like this.

The Solution:

The solution is to separate your Internet traffic from your LAN (file sharing) traffic. To do this, a special networking device or software can be placed between your computers and the Internet. The devices are called broadband routers or Internet gateways. Programs can be loaded on one of your computer to do this but require two network cards in the computer that has the sharing software running.

Newer Microsoft operating systems have a program called ICS that can do this for you or more robust solutions can be purchased from various software vendors.

Broadband routers are a better solution if you want to be able to plug in a device and never have to think about it again. Broadband routers have been expensive in the past but now are well under $100 for a basic model.

A broadband router will keep your computers from broadcasting their file sharing traffic across the Internet. In addition, attempts by hackers to access your computers are stopped by a broadband router. Lastly, broadband routers can share your single Internet connection with all the computers in your house without having to pay your broadband provider extra money for each computer!

Links:

Broadband Router Guide

Connection Sharing Software

Microsoft ICS Zone

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User Comments	234 comments
Hub / Multiple IP Internet Connection Sharing with cable modems and dsl modems

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IP addresses by Martin - 07/01/2002 12:51:00

Re: IP addresses by a guy - 14/01/2002 15:17:00

Re: IP addresses by rajesh - 21/01/2004 03:11:00

Re: IP addresses by Anuj - 12/05/2006 08:36:00

Re: IP addresses by pavan kumar.L.M - 28/07/2006 00:41:00

ADSL - Routing/LAN config by NiCrypto - 30/01/2002 09:19:00

Re: ADSL - Routing/LAN config by Jim G - 22/02/2002 15:09:00

sharing internet connection with a hub and 1 IP address by Paul - 23/03/2002 09:50:00

Re: sharing internet connection with a hub and 1 IP address by abhishek - 13/04/2002 14:45:00

Re: sharing internet connection with a hub and 1 IP address by Vimal nair - 16/04/2002 13:19:00

Re: sharing internet connection with a hub and 1 IP address by guy - 16/04/2002 15:02:00

Re: sharing internet connection with a hub and 1 IP address by Guess - 22/04/2002 22:07:00

Re: sharing internet connection with a hub and 1 IP address by Kevin - 12/07/2002 16:16:00

Re: sharing internet connection with a hub and 1 IP address by Sourav - 23/05/2005 10:59:00

Re: sharing internet connection with a hub and 1 IP address by geeWhiz - 02/07/2003 14:12:00

Re: sharing internet connection with a hub and 1 IP address by rolan - 07/05/2002 01:56:00

Re: sharing internet connection with a hub and 1 IP address by Ximena - 04/07/2002 14:55:00

Re: sharing internet connection with a hub and 1 IP address by Rick - 16/07/2002 12:36:00

Re: sharing internet connection with a hub and 1 IP address by manoj - 17/12/2004 09:15:00

Re: sharing internet connection with a hub and 1 IP address by carlos - 11/09/2002 21:47:00

Re: sharing internet connection with a hub and 1 IP address by Auteph - 18/10/2004 13:17:00

which is better in internet conection using a router or using 2 lan card on 1 pc as server? by dasoon - 10/11/2006 07:01:00

Re: sharing internet connection with a hub and 1 IP address by glenn - 11/07/2002 16:03:00

Re: sharing internet connection with a hub and 1 IP address by peter - 09/02/2004 14:44:00

router/hub combo by Joe - 12/04/2002 00:03:00

Re: router/hub combo by Superskink - 10/05/2002 11:21:00

Re: router/hub combo by Sergio - 15/06/2002 21:59:00

Re: router/hub combo by al - 08/07/2005 17:38:00

Difference between Switch and Hub by wcs1411 - 19/04/2002 08:18:00

Re: Difference between Switch and Hub by Brian - 28/04/2002 11:10:00

Re: Difference between Switch and Hub by wcs1411 - 02/05/2002 17:49:00

Re: Difference between Switch and Hub by Rick - 16/07/2002 12:41:00

Networking 2 home computers and cable connection with only 1 hub by David - 14/05/2002 12:59:00

Re: Networking 2 home computers and cable connection with only 1 hub by skull - 27/05/2002 22:16:00

Re: Networking 2 home computers and cable connection with only 1 hub by Max - 28/05/2002 03:55:00

Re: Networking 2 home computers and cable connection with only 1 hub by Jimmy - 05/07/2002 11:15:00

Re: Networking 2 home computers and cable connection with only 1 hub by Mike - 04/07/2002 16:27:00

Re: Networking 2 home computers and cable connection with only 1 hub by glenn - 11/07/2002 16:14:00

Re: Networking 2 home computers and cable connection with only 1 hub by Jen - 14/07/2002 16:22:00

Re: Networking 2 home computers and cable connection with only 1 hub by Dave - 26/01/2003 03:26:00

Re: Networking 2 home computers and cable connection with only 1 hub by Wolffe - 22/10/2002 00:07:00

Re: Networking 2 home computers and cable connection with only 1 hub by jeff - 26/09/2005 19:18:00

Re: Networking 2 home computers and cable connection with only 1 hub by Larry - 06/06/2002 14:21:00

Re: Networking 2 home computers and cable connection with only 1 hub by Chris - 13/10/2003 03:56:00

Re: Networking 2 home computers and cable connection with only 1 hub by Highlander - 24/11/2005 18:29:00

connection by krystin - 01/06/2002 21:08:00

Re: connection by endorphin - 21/08/2002 17:26:00

Re: connection by liza hamisi - 22/11/2004 14:55:00

Re: connection by liza hamisi - 22/11/2004 14:58:00

slow internet by Ken - 03/06/2002 06:49:00

Re: slow internet by Sampleminded - 03/06/2002 09:48:00

Pinging by fusejob - 04/06/2002 12:20:00

4 computers, 1 hub, 1 router, 1 cable modem by Dan - 04/06/2002 21:48:00

Re: 4 computers, 1 hub, 1 router, 1 cable modem by Joe Kadiri - 06/06/2002 18:05:00

Re: 4 computers, 1 hub, 1 router, 1 cable modem by jps - 10/06/2002 12:46:00

Re: 4 computers, 1 hub, 1 router, 1 cable modem by Rick - 16/07/2002 12:49:00

Need help! 2 computers, 2 laptops with wireless cards, 1 router, 1 cable modem and printers... but t by S. Kirscher - 30/12/2002 01:35:00

Re: 4 computers, 1 hub, 1 router, 1 cable modem by randz - 07/04/2004 01:29:00

help by Gagan - 17/02/2006 21:17:00

Sharing ethernet or cable modem by Andy - 20/06/2002 20:52:00

Re: Sharing ethernet or cable modem by kou - 03/07/2002 16:43:00

Re: Sharing ethernet or cable modem by Sam In Va. - 08/07/2002 11:24:00

Re: Sharing ethernet or cable modem by Justin - 25/08/2002 01:12:00

DES-2205 Ethernet switch by Al - 29/06/2002 16:06:00

2 computers, 2 ip addresses & cable modem by Barry - 06/07/2002 10:24:00

Re: 2 computers, 2 ip addresses & cable modem by Rick - 16/07/2002 12:56:00

read articles/comments still looking for info by Sam In Va. - 08/07/2002 11:39:00

slow connection by Terry - 20/07/2002 09:47:00

Re: slow connection by Terry - 20/07/2002 09:49:00

Re: slow connection by JDW - 30/07/2002 18:23:00

Slow internet with XP by nick - 25/07/2002 06:17:00

adsl internet over lan by zoltan.hegedus - 10/08/2002 17:06:00

Re: adsl internet over lan by endorphin - 21/08/2002 17:25:00

NO ROUTER! by BoraBora - 23/08/2002 11:34:00

Re: NO ROUTER! by bob - 09/05/2003 22:45:00

5 computers need to share one dsl connection by Brandon - 26/08/2002 01:14:00

Re: 5 computers need to share one dsl connection by BOB - 12/10/2002 11:02:00

Re: 5 computers need to share one dsl connection by Chris - 12/10/2002 23:17:00

Question about routers and games by Eric - 04/09/2002 09:56:00

Re: Question about routers and games by Mat128 - 07/09/2002 16:37:00

2 Dif. Network Cards and Encryption by Mark - 16/09/2002 13:11:00

cable modem & networking by Andy - 16/09/2002 22:25:00

i need help. cable modem, switch and 2 computers by austin - 18/09/2002 19:21:00

Re: i need help. cable modem, switch and 2 computers by Austin - 21/09/2002 21:21:00

Re: i need help. cable modem, switch and 2 computers by CJ - 01/10/2002 19:03:00

Re: i need help. cable modem, switch and 2 computers by Cheryl - 25/12/2004 09:41:00

Re: i need help. cable modem, switch and 2 computers by feng wang - 25/09/2002 20:33:00

I need help with IP ! by Kuelguy - 19/09/2002 16:03:00

Coyote Linux- Configuration by Donkey - 23/09/2002 14:57:00

Re: Coyote Linux- Configuration by googs - 29/09/2002 09:02:00

Router with roadrunner by steve - 27/09/2002 12:54:00

Re: Router with roadrunner by Paul Meyer - 02/11/2002 19:37:00

Re: Router with roadrunner by thurman - 10/11/2006 17:11:00

Posted by thurman

10/11/2006 17:11:00.

Re: Router with roadrunner

ok, first, modems and routers are bsaically the same, otherwise, cable companies would connect directly to PCs... now a modem uses a mac adress and a ip adress, so do routers and PCs...the most common problem with modem, router, and pc connections is that they(the devices) are started in the wrong sequence...first, turn all devices off... start the pc, when the pc is fully ready to be used, then connect ethernet (PC to router)... power up the router, when it sycs, then connect ethernet (router to modem), now, power up the modem... it should now be able to operate...if you still have no connectivity, then you need to clone the PC's ip/mac address into the router, and follow the previous instructions...in this case, you will need your router's default ip address...the default ip address is typed into your browser's search bar and then press "enter"... now you can explore your router's configuration settings, you should be able to locate a selection that says "clone mac/IP" or close to it...

reply

need help plz by carlos - 10/10/2002 14:17:00

just cheking by carlos - 15/10/2002 22:02:00

Ethernet problem by Jeff - 11/10/2002 00:58:00

Sharing cable connection with a hub without 2 ips by stefan - 13/10/2002 10:04:00

Re: Sharing cable connection with a hub without 2 ips by SN4IL - 14/10/2002 21:07:00

Re: Sharing cable connection with a hub without 2 ips by mohamed - 14/04/2005 07:21:00

hi people, plz help me urgent by carlos aquino - 15/10/2002 22:09:00

Wireless router and cable modem question... by Alex - 16/10/2002 19:35:00

3 computers, cablemodem, hub and problems! by Jeff - 17/10/2002 09:57:00

Re: 3 computers, cablemodem, hub and problems! by Tom - 22/10/2002 12:39:00

sharing internet connection with cable modem and 2 computers by timothystow - 24/10/2002 17:43:00

shared internet help by Kanay - 25/10/2002 15:53:00

Instructions to connect two PCs for Internet Sharing by Chewy - 01/11/2002 13:54:00

2 cable modems - 1 computer = double d/l speed???? by Mark - 02/11/2002 11:25:00

Re: 2 cable modems - 1 computer = double d/l speed???? by one - 06/11/2002 12:04:00

security concerns by sunflower - 03/11/2002 18:25:00

Roadrunner cable, routers by Paul Meyer - 04/11/2002 21:42:00

cannot get my network on the internet by Ernie - 06/11/2002 04:17:00

cable modem + 1 Netgear Router and 3 wire less Netgers adapters by Robert Welch - 08/11/2002 15:16:00

3 Pcs 1 switching hub with network card in each pc by athensi - 14/11/2002 03:28:00

adsl internet connection sharing by creatorr - 16/11/2002 10:27:00

Re: similar problem but with selective browsing by Bill - 22/11/2002 15:33:00

Re: similar problem but with selective browsing by creatorr - 22/11/2002 20:12:00

Is a hub or a switch needed with a Cable Modem? by Mal - 19/11/2002 02:06:00

Re: Is a hub or a switch needed with a Cable Modem? by vanco - 22/11/2002 08:30:00

Problems with IP Internet Connection Sharing by Jacob - 11/12/2002 11:19:00

Running FTP & Mail server on Earthlink DSL , MS Wireless Base Station MN-500 & 3 IP Ranges by WestSide - 12/12/2002 22:58:00

Re: Running FTP & Mail server on Earthlink DSL , MS Wireless Base Station MN-500 & 3 IP Ranges by WestSide - 18/12/2002 09:47:00

Capping Bandwidth by Brian - 13/12/2002 04:48:00

2 ip addresses, 1 hub/switch, 2 computers by Bill Kaz - 23/12/2002 15:18:00

Sharing Internet with a Hub by Cristy - 16/01/2003 20:28:00

Re: Sharing Internet with a Hub by kh - 28/01/2003 10:58:00

one cable connection two computers by Dave - 22/01/2003 22:21:00

SBC Yahoo DSL-1 Dynamic IP For 5 PC's. HELP by MV - 27/01/2003 23:33:00

Sharing a brodband connection by Anita - 09/02/2003 12:52:00

Hub/Switch? by Brian - 01/03/2003 06:40:00

Re: slow connection by Eyob Tsegay - 17/03/2003 09:34:00

Connecting 713P & 604 by patrick - 25/03/2003 19:32:00

2 IPs, 2 PCs, Hub/Router quickie... by Jeff - 30/03/2003 03:11:00

Re: 2 IPs, 2 PCs, Hub/Router quickie... by earthwormjim - 04/04/2003 16:40:00

HOW DO I SHARE TELSTRA CABLE INTERNET THROUGH A ROUTER?-- advive highly valued by Joe in Aus - 04/04/2003 19:58:00

changed to switch now slow by Dan - 23/04/2003 03:33:00

Internet sharing using 1 dsl (dynamic ip address) in 15 PC by dranreb - 27/04/2003 03:58:00

Home Networking by whateva - 02/05/2003 11:58:00

multiple IP's with a router? by Scott - 18/05/2003 18:13:00

HELP..WHAT IS BETTER FOR ME ROUTER OR HUB by Matt - 31/05/2003 11:00:00

Re: HELP..WHAT IS BETTER FOR ME ROUTER OR HUB by Scott - 02/07/2003 10:17:00

2 puters 3 NICS, does this work? by pHATE - 02/07/2003 12:51:00

Re: 2 puters 3 NICS, does this work? by Nyad - 18/07/2003 23:29:00

2 computers, 1 router, and roadrunner by andrea - 12/07/2003 15:49:00

Re: 2 computers, 1 router, and roadrunner by Nyad - 18/07/2003 23:32:00

Modem with One Port by Bryan - 10/08/2003 13:52:00

Lease expires with RR cable modem by Sulaiman Karmali - 22/08/2003 15:48:00

Ntwrkng 7 cmptrs & 2 prntrs - cable by Seth Kahle - 25/08/2003 22:18:00

Switch problem by Moses - 09/09/2003 10:38:00

Internet Conection Sharing Problem by Blinded By Frustration - 13/09/2003 09:00:00

WIRELESS ROUTER by MARTIN - 02/10/2003 18:11:00

Re: WIRELESS ROUTER by Tom - 04/10/2003 20:19:00

Re: WIRELESS ROUTER by Wendy - 31/10/2004 15:22:00

twin networks by richiewatts - 24/11/2003 09:05:00

6 computers, 1 hub, 1 router, 1 cable modem, 1 phoneline by Romwell Tia - 12/12/2003 05:50:00

6 pc, 2 dial-up modem, 1 hub switch by romwell Tia - 17/12/2003 02:18:00

5 laptops, 1 PC and cable modem..need help! by Bryan - 21/12/2003 09:41:00

Re: 5 laptops, 1 PC and cable modem..need help! by Pete - 10/02/2005 05:24:00

IP Address by ayin - 07/01/2004 20:21:00

lost cable connection by pakriz - 10/01/2004 12:58:00

Re: lost cable connection by pakriz - 10/01/2004 15:48:00

Wireless and LAN Help by Deena - 17/01/2004 13:54:00

hub by Ziad - 04/02/2004 14:38:00

Charter Cable Misleading?? Router Problems by PDS - 05/02/2004 08:10:00

routers / firewalls by ron - 13/03/2004 22:10:00

hooking a ethernet connection to a usb connection by drew - 16/03/2004 11:49:00

Need Info on 2 PC LAN with 2 IP's By ISP by Nick ( Tampa, Fl ) - 18/03/2004 09:52:00

Pre wired by Freddie - 10/04/2004 18:39:00

2 internet connection on 1 computer !?!? by sekelus - 16/04/2004 00:45:00

hubs and ip addresses by Doug - 15/06/2004 23:54:00

Want to connect to computer by ken - 06/07/2004 02:11:00

Cablemodem -] Hub -] Router -] Connection Loss by Chris010204 - 16/07/2004 17:56:00

Tricky networking... by Mark - 20/07/2004 19:22:00

Sharing DSL with 2 PC's by Stacey Teed - 21/07/2004 20:52:00

Dialup networking with 2 internet connections? by Melvyn - 26/07/2004 18:08:00

help cable + router + 2 comp dont work by george - 03/08/2004 02:56:00

Re: help cable + router + 2 comp dont work by thurman - 10/11/2006 16:37:00

laptop connections by tim - 05/08/2004 06:10:00

Re: laptop connections by langedijker - 24/08/2004 17:51:00

Can't Connect XP and OSX with Linksys Router!! PLEASE Help! by Dustin - 10/08/2004 10:50:00

Please help by Quintin - 23/08/2004 11:56:00

Re: Please help by Super Geek - 01/09/2004 10:32:00

modem to hub to router to pcs by Adam 0ptik - 31/08/2004 21:29:00

Re: modem to hub to router to pcs by ken ea$$on - 07/09/2004 16:33:00

Hello by Ramu - 10/09/2004 04:32:00

One Broadband connection on 2 computer by PDk - 09/10/2004 16:32:00

RoadRunner, with Router / pls help by Joy - 12/10/2004 15:13:00

Re: RoadRunner, with Router / pls help by Ron - 05/11/2004 16:00:00

Multiple IPs on a LAN card by manzoor - 26/11/2004 03:10:00

2 cable modems 2 computers ? by kris - 01/12/2004 09:21:00

Re: 2 cable modems 2 computers ? by Liza Hamisi - 04/12/2004 04:35:00

Re: 2 cable modems 2 computers ? by kris - 06/12/2004 17:42:00

Re: 2 cable modems 2 computers ? by coots - 03/06/2006 21:43:00

~*~*~*~ 2 comps 1 switch 1 cable modem please help me!!!!! by Spencer Sinner - 09/12/2004 20:26:00

sharing internet between two computers by Cheryl Adkins - 25/12/2004 09:45:00

a cable modem , 2 ips, a switch, 1 computer 1 ip, other ip to a router, router to 2 more computers by frustratedHusker - 05/01/2005 05:16:00

Re: a cable modem , 2 ips, a switch, 1 computer 1 ip, other ip to a router, router to 2 more compute by Brian - 21/01/2005 18:43:00

Re: a cable modem , 2 ips, a switch, 1 computer 1 ip, other ip to a router, router to 2 more compute by coots - 03/06/2006 21:49:00

Multiple cable internet line sharing in single network? anybody can help me? by Mehul - 13/01/2005 00:38:00

Re: Multiple cable internet line sharing in single network? anybody can help me? by Avishai - 24/01/2005 14:05:00

5 Computers, 1 Hub, cable connection by Rhys - 24/02/2005 08:57:00

Networking by 192.168.0.1 - 11/03/2005 10:10:00

internet sharing & Networking by rits - 18/03/2005 14:49:00

Re: internet sharing & Networking by me - 25/03/2005 15:38:00

Re: Networking by me - 25/03/2005 15:31:00

how to connect cable modem to router by michael - 03/04/2005 00:10:00

Re: how to connect cable modem to router by thurman - 10/11/2006 16:48:00

fair bandwidth on lan using cable connection by imran - 11/04/2005 09:24:00

2 PC's 2 IP's by MiL0 - 08/05/2005 16:15:00

Config issues by brino - 02/06/2005 17:57:00

connect 192.168.0.0 with 192.168.1.0 using single hub by zeeshan anwer - 01/07/2005 08:58:00

2 internet lines in one system parallel by sanjeevi - 29/07/2005 06:39:00

Multiples IP for a single laptop by mukherjee - 22/09/2005 06:04:00

IP adress by Taylor - 25/09/2005 11:11:00

help by Samantha - 26/09/2005 19:37:00

20 computers sharing 1 sattelite internet connection offshore by cmatex - 05/11/2005 19:58:00

on connecting by sam - 15/12/2005 05:08:00

Re: on connecting by Webhoster - 14/01/2006 18:37:00

Sharing 1 ip over a hub between 2 pc's by Patrick - 19/01/2006 14:14:00

Re: Sharing 1 ip over a hub between 2 pc's by DSL - 19/03/2006 22:26:00

Internet sharing using a hub by Dario - 02/05/2006 14:56:00

Multiple Live IP by Prashant - 20/05/2006 07:20:00

Hosting two Webservers on the same modem/router. by Jason - 03/06/2006 01:12:00

Sharing internet among 10 PCs with 2 IP addresses by Kiran - 15/07/2006 07:21:00

Help! sharing internet w/2 comps. by Yer Xiong - 23/07/2006 21:30:00

Re: Help! sharing internet w/2 comps. by ELLY - 23/08/2006 06:52:00

Want to network 2 comps. HELP!!! by Mike - 26/07/2006 14:10:00

Little problem by Bálint - 04/09/2006 15:56:00

Re: Little problem by SHoe - 09/09/2006 15:03:00

help me regarding home networking by rajesh - 21/10/2006 10:07:00

internet connection sharing by pol - 08/01/2007 22:37:00

Posted by pol

08/01/2007 22:37:00.

internet connection sharing

hello...

i just wanna ask how i can share my internet connection using only 1 IP address and a hub. I am using windows xp for all of my computers nd there are at least 6 computers on the network..

I have two lan cards for the host pc and i don't kow how to configure my computers..

thnks help is much appreciated...

reply

Re: internet connection sharing by Raja - 03/02/2007 07:08:00

Posted by Raja

03/02/2007 07:08:00.

Re: internet connection sharing

For internet sharing with one hub and you install two lan cards and provide ip address and install winproxy on server pc and Ping each Pc to server and provide default gateway of server on client pc.

reply

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