Cable Modem!!!!?????

[ral]

I'm a little confused as to how cable modem fits into the scheme of a 10 Base/T Peer-to-Peer win 95 network. I know a cable modem plugs into an ethernet port. If I already have a 10Base/T network in my house, do I have to buy a second network card for a cable modem? Or can I plug the cable modem directly into the hub, and this way any computer could use it without another computer having to be on (a big plus)?

[Digital Avatar]

If I'm not mistaken, cable modems are based on RG/59 cable which has a 75 ohm impedence. Thinnet and Thicknet have an impedence of 50 ohms. Can anyone tell me if cable modems use this type of cable? Also if you have a 10baseT network then again your cable types are worlds apart. 10baseT use unshielded twisted pair cabling which uses an RJ-45 connector. RG/58 Coax uses BNC connectors which are physically incompatable. I think there are hubs available that have both BNC and RJ-45 connectors, but to my knowledge its not possible to do what you are implying. Why not run wingate or sygate on the machine that the cable modem is on and share the connection with the PCs on your network? Anyone have anything else to add?

[Lord Murkyl]

It really depends on what type of cable modem you have. I have @Home through TCI here in the Bay Area. I have a LanCity modem. WIth teh normal subscription price, I only get 1 fixed IP address. The modem will lock on to the first MAC (media access control) address it sees upon power up. This prevents you from hooking the cable modem up to a hub usually. I use a Linux box to IP masquerade out. @Home does have an option to add more IPs to the cable modem. At this point, I'm not sure if they are going to up IP filter rules on the modem and let it be hooked up to a hub or if they are going to do something else. I would guess they would remove the MAC lock and just use IP filters. I hope that answered your question.

[Lazarus]

I have at @Home cable modem with a fixed IP as well. The way I've got it working, after I discovered for myself that it wouldn't work hooked up to the hub, was to attach the cable modem to a separate NIC in the Linux box. Once I enable IP forwarding, I can surf the web from all the other machines. Works very nicely, even for my girlfriend's Mac.

[mfurdyk]

Right. In my area, we have ADSL (Nortel Networks modem) -- the modem can be plugged directly into a hub, but only two computers can access the net through the hub this way. I use Sygate on my main PC to share access with my old computer and iMac.

[esiu]

I don't understand, mfurdyk... Do you subscribe 2 IP addresses from the net provider? Otherwise how can the cable modem be connected to the hub and the modem be able to send stuff to 2 different machines? I read the manual of the Nortel 1-M Modem and it says it supports up to 2 computers... so does the ADSL modem works partially as a hub???


For me, I'm planning get an extra ethernet card, get the cable modem connected there and to run Wingate on that machine. Do you think a Pentium 166 will be sufficient? The other machine is PII-300.

Thanks for any suggestion/comment....



[This message has been edited by esiu (edited 02-22-99).]

[RuKus]

I Don't know to much about networking but i thought that the Cable modem plugged into the net card on system w/ two network cards, and then the connection could be routed using Win proxy lite for up to 3 users and winproxy for unlimited users. and as long as you have a ring, or a cascading Hub setup you can have as many users logged on as you want.

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xxninxx@mediaone.net I drive a Jeep

[Eccentric]

esiu,

All of those internet share products do basically the same thing. It only needs one true IP. Basically they set up a firewall or proxy server. Computers "behind" the firewall/proxy, have internal IP, and cannot be reached directly from the outside. All packets go through the machine with the IP, in and out. For example if a machine inside wants to send a packet to a machine outside of it's network it sends the packet to the "gateway" or the machine with the "real" IP.

[JTC]

Thanks for the heads-up guys. I needed this exact info for my school assignment. http://www.hardwarecentral.com/discussion/smile.gif

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[chris jones]

i have a cable modem and my shared computer uses the ip address of the server though it usually illegal to do this why isnt it illegal to hook up more than one cable accessed tv in the same household go figure if its in my house i will do what i want but to answer your original question cable modems usually use cat5 cable and you an plug the modem into a hub as long as it is in the port that you would hook another hub too

[Eccentric]

mfurdyk,
Same question as esiu. Why does it limit to to computers through the hub? Is it because you two IP's? If so why even pay for the second one when your using Sygate anyway????

[Anyland]

well i think it would be best for you to buy another hub i have a cable modem at home, a Zenith Homworks Universal that i got though my ISP and all i did was buy a hub and another netwrok card....i set up one of the network cards for the cable modem's IP and then i put in a different network card for my network that is plugged into the hub, if ou have a perm ip then its hard to set it up so that all the comps have ip access from the hub its yer best bet to set it up with 2 network cards, one with the cable modem ip and the other with the 192.168.0.x for the network comps.

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e-mail me at both anyland@cmsd.bc.ca
and nilez@osg.net

[MGallik]

I have mediaone in Chicago
and I just plugged the cable
modem into the uplink port
and what ever machine is turned
on first after the modem and
hub is on the air.

[mpmeeks]

Heheh i guess im lucky then with my com21 modem.

I get 8 IP addresses to my one modem =c) no need for ip masquerading. hehe.

of course, my modem runs at 256/64

but thats because i live in alaska and the company had to run a 2500 mile fiberoptic.

that gets expensive.

I have my modem plugged into my hub with a crossover cable, since, sadly, i burned out my uplink port (static electricity, i think). everything works great for lanpartys.

just felt like putting my 2 cents in. hehe