Cable Modems: Information About High Speed Internet and Broadband Access The Cable Modem Information Network
 Cable Modem Home - Forums - Statistics - Sign Up - Search -
Cable-Modem.Net Forums / Cable Modem Discussion / Two cable modems...
. 1 . 2 . >>
Author Message
WilliamE
Member
# Posted: 6 Sep 2004 21:50


I am on roadrunner. Can I connect a second modem in the basement to access the same account? Wireless does not reach down there.... I appreciate your help,

William

gunther52

# Posted: 7 Sep 2004 21:17


no, this will not work. Run cat5 or a wireless access point near the top of the stairs

Anonymous

# Posted: 1 Oct 2004 02:30


Here's the thing. To get two static IP addresses from comcast or any other cable ISP you are going to pay an arm and leg for it You don't need two "static" IP's - what you need are two PC's connected. Static IP's cost alot more monet than regular comcast DHCP renewable IP's - and they still wont let you run a server unless you go business class. It's nearly as costly as getting two totally seperate accounts. For one, you have to have two cable modems registered in thier system, and that in effect creates two accounts. You could just pay 4.95 for a month for another IP address and use a hub or regular switch but again, with your expanation of what you want to do you still need two modems and if you run two modems with two PC's it will cost you a second account. Basically Comcast would give you a discount with the second account.

What you really should do is just pay for one IP, and use either a router and run cat 5 to the other PC, or use a wireless gateway (router) and use a wirless PCI NIC for the other. That way you only have to register one computer and both will connect through that one account. The other PC downstairs or whatever would be connected wired or wirelessly and would be running on a cloned MAC addy of your main PC. That way you only pay the base price for one simple account and you can use both totally seamlessly. If you need further help just post and i'll direct you to a few great routers and guide you through it (setup). I don't install cable anymore (I used to do it with Road Runner). Sysadmin for a mojor corp now

Anonymous

# Posted: 22 Dec 2004 10:14


I trying to connect a webserver to a Comcast cable modem for connection from the internet. This device controls the building BAS (Building Automation System) The box supports DHCP and DNS however these servers are not available. The site has a Comcast cable modem with (1) RG6 connection and (4) RJ45 tcpip ports. Can Comcast assign a static IP address to one port and forward the port to 80 so that I can ping the box from he internet?

Any help would be appreciated>

aaa

# Posted: 27 Dec 2004 14:20


HI I have a comcast cable connection, and a linksys router for games and another computer. But trying to get an ip address to connect to net meeting is not working for me. I called comcast and they gave me the ip to use, but say that the only way to get it on my own is to disconnect the router. That does not make sense. They gave me a permanent ip address for the x box, but it does not work for someone to net meet with me.

Any ideas on how to get the ip address without having to call tech support or disconnecting the router?

ps2 gamer

# Posted: 2 Mar 2005 15:42


can i use two modems. use one for uploading and the other for downloading. if one is dsl and the other is cable. if so how.

Anonymous

# Posted: 5 Mar 2005 17:15


Omg,What noobs, first off I use comcast my linksys router works fine for wireless ,and for gaming on xbox live,and 3 other computers. Second off he said he has Roadrunner. RR sucks I lived in NY and that thing always had a problem. Plus it only pumped out 1.5mb max. But in reality maximium you would ever see is 500kb. With Comcast you get 4.5mb Max a much needed upgrade. Second off he said his wireless signal won't reach the basement. So what you need is to get extension antennaes for your wireless if your using linksys they are 30 bucks a pair so buy those. And then next make sure your using a network adapter. I meet noobs whose get everything ready as I told them and they didn't have a network adapter to begin with. Belkin is good,linksys is good and netgear is good as well. They are all compatible with linksys. Thank for listening my noob friends.

Anonymous

# Posted: 2 Apr 2005 05:35


Your dynamic ip will work on dns.Its alot more work and takes some monitoring of the ip on your part.And port 80 along with all other ports are open in comcast.At least this is my case.I run an entire domain off my cable modem the only thing i ever have to worry about is my ip changing screwing up my DNS server.You should have 2 Dns servers anyway for redundancy.If your dns goes down users and yourself still have a backup to resolve host names and zones. www.bits2bytes.net is my domain.i have just a residential account.I use web servers e mail servers VPN dns DHCP and more.anything is possible with any internet connection.

badwolf

# Posted: 4 Apr 2005 19:58


My roommate has Comcast cable high speed internet (HSI) and allowed me to connect a Linksys wireless broadband router w/ 5 port switch to his modem so I can access HSI from my room via wireless network adapter. His PC is plugged directly into the switch. He complains of slower performance (i.e. internet web page loading) and occasional loss of HSI service under this config (he showed me a screen indicating DNS errors), while my wireless connection has been consistently excellent. I'm not going to touch his PC unless I have an idea of what might be causing the problems with it. I don't have the time or patience to screw around with this. I need consistent internet access, and right now he's apt to unplug the router and reconnect his PC directly to the modem when things quit working (although cycling the power on everything seems to resolve the problem -- at least temporarily). I'm considering getting a second cable model and my own account, as there's a cable connection in my room, but thought I'd toss this out and see if anyone has a suggestion for me to try before abandoning the connection sharing approach. The only thing I can think of that might be causing this is my periodic use of a VPN connection to my company's network, but never had issues like this with a similar setup in my own home (Qwest DSL modem w/ built-in router plus separate mini-hub). Any thoughts?

Im a Nooby a What?

# Posted: 8 Apr 2005 15:02


can an ethernet wirless adapter be connected to a router or net hub and still provide both internet and static ip addresses

Anonymous

# Posted: 22 Apr 2005 10:30


Can anyone help?? I am trying to get on to a web site with 2 computers but not being recognized as coming from the same source. I am using a linksys router and I can get on the website with 2 computers but I can't get into the same room. It gives a message saying that we don't allow 2 pc with the same IP address to enter the same table.. So, I know I can go and pay $40 for another cable line and modem but is there anyway around that? Thanks.

besticandu

# Posted: 24 Apr 2005 07:56


A second ip can usually be purchased through your Cable or DSL ISP for usually just a few dollars.Cox Cable provides additional IP for 10.00 USD.Secondly yes a wireless net adapter can be connected to a wirless ap with static ip and internet .the best way to do it is first configure the ip staticly in the tcp/ip properties of you adapter,Then access your web config of your particular router and generally you will find it under advanced routing and you will in some case be able to select your adapters physical address (MAC) out of a drop down list and configure th ip parameters in the router to be a static route.I have also found that if its not done in this way that linksys routers tend to have conflicting IP's.And i have also ran into routers where the wirless WLAN works great but the switching portion of the router is bad or vice versa. so the network bottleneck on the other posting could be a bad router.Or the PC could also be affected by spyware.but if its actual DNS errors you are getting i would configure your ISP's DNS setting on your friends adapter staticaly.and check ip config to see if it is the router that is assigned as DNS.Another thing to check is to try and flush and re-regiters his dns by opening a command prompt and typing ipconfig/flushdns then when that is complete try ipconfig/registerdns.The DNS error you are probably seeing is just a error page that says this page cannot be displayed etc.and if so it could be a bad modem or if the coax was not ran corectly could cause intermittent connectivity.The cable line should always be ran all the way back to your main line bypassing subscriber amplifers and tv's.and if this is done it could be a return problem on the cable system or the drop comming to your home.The return path and your downstream path operate on two differant bands.Your downstream could be ok your upstream path may be bad.Also what i find to cause both bad updtream paths and downstream paths are bad splitters such as radioshack spliters.Cable modems work on bands usually over 900mhz.So its very important to use only 1000 mhz splitters or better.

http://www.bits2bytes.net

besticandu

# Posted: 24 Apr 2005 07:59


ps..william E...buy a repeater or range extender.

besticandu

# Posted: 24 Apr 2005 08:01


p.s.s cable isp's will usually not allow a second modem on 1 account without paying for a second cable modem service.but most cable modems are capable of assigning 2 IP's through a hub.

ausgeek

# Posted: 25 Apr 2005 08:01


Anonymous

Is my understanding from reading the above correct that i can subscribe to roadrunner, buy my own wireless router, and have wireless all over the house?

Or, does Roadrunner prevent this in some way so you have to buy wireless from it?

besticandu

# Posted: 4 May 2005 20:01


Yes ausgeek you can.depending on the size of your home you may need some type of extender/repeater.

Anonymous

# Posted: 1 Jun 2005 16:09


my cable modem is syncing up and i'm getting an IP from this ISP provider but is not letting me browse... I don't have an account with them, can you tell me if I need some TCP/IP configuration?

jimmyj89

# Posted: 16 Jun 2005 08:47


I just moved into a new apartment in the basement of a house. My landlord upstairs has a wireless system but i could not get the signal on my laptop. He has a cable modem through comcast. Can I purchase something to improve the signal recognizing capabilities of my laptop? If I purchase a cable modem and plug it into the cable line in my apartment will I be able to recieve Internet service without going through comcast? I am looking for the cheapest way to get service. Please help me out.

besticandu

# Posted: 17 Jun 2005 22:08


Anonymous


Posted: Jun 1, 2005 16:09:19
Quote

my cable modem is syncing up and i'm getting an IP from this ISP provider but is not letting me browse... I don't have an account with them, can you tell me if I need some TCP/IP configuration?
jimmyj89


Posted: Jun 16, 2005 08:47:17
Quote

I just moved into a new apartment in the basement of a house. My landlord upstairs has a wireless system but i could not get the signal on my laptop. He has a cable modem through comcast. Can I purchase something to improve the signal recognizing capabilities of my laptop? If I purchase a cable modem and plug it into the cable line in my apartment will I be able to recieve Internet service without going through comcast? I am looking for the cheapest way to get service. Please help me out.

This should answer both questions. you can generally plug a cable modem into almost any cable line and have it sync with the CMTS and even pull an IP From the DHCP Server but that IP when you dont have an account is a non-routable IP and you are only on their intranet and sometime you can even pull up a page and get a self registration page in internet explorer.And your modem at some cable providers will allow you to do a self provisioning.But in some of cox cables systems those pages do not work without calling in and getting an account with them first.Then your self install page will help provision your modem.

Otherwise if the IP you get is a routable IP then you may have a problem with IE itself or maybe a corrupt winsock2.A have also seen some internet security software can cause this issue. Such as Symantec internet security and McAfee security center.

Now with the router,You can buy wireless range expander's and thigs that can enhance the signal of the network if thats the issue.
Otherwise if he has set up his network to disable SSID broadcasting then you should'nt be able to see it at all.Another issue could be Bad Wireless nic. Can you see the network when scanning ?
The cheapeast is dialup.

Anonymous

# Posted: 5 Jul 2005 00:03


Hey I'm an annonomyous dude josh. i just moved in my GF's and they have Cable modem with comcast and I want to hook my PC up with the same DSL/Cable without it costing anymore money to where nothing changes I read about your routers, it seems easier to do that. So if you could direct me to one that isn't expensive that would be great, Thanks

ananymous

# Posted: 6 Jul 2005 18:50


I need help. I would like to get a second modem from comcast to use for x-box live because my father claims to get hard-core porn pop-ups whenever I use x-box live. I thought I read somewhere that I could get a second modem for about $7.00 a month. I'm wondering if this is a second account or not and if this is true or not.

Anonymous

# Posted: 12 Jul 2005 13:25


Folks,
I have my PC upstairs and my PS2/Xbox downstairs. I have my modem upstairs for my PC and would like to just buy another moden and set it up downstairs so I can get online for the PS2 and Xbox. I hav comcast as an ISP and would like to know if I can just buy another modem and hook it up? ANy help is appreciated....

Anonymous

# Posted: 14 Jul 2005 18:24


Hello,
I recently subscribed to comcast residential internet, it works good. Then I registered a Domain name , worked fine until my comcast ip address changed because they only offer dynamic ip addresses to residential accounts, so i called them , after being forwarded at least 6 times and disconnected once or twice and an hour on the phone I finally got an answer from a rude sales rep stating "it is company policy to not offer static ip addresses to residential accounts" WTF does that mean ? I probed him for a REAL answer and he did not budge , the truth to the matter is to get a static ip address they want you to upgrade to a commercial account and pay $120+ per month. What Jerks. In conclusion i would reccomend boycotting comcast internet and go with someone who has decent technical support with real answers. Yes it is possible to still register a domain and keep upating your ip , or use a automated tool to do so , but it is still a pain in the ass. Therefore comcast can go suck a lemon as far as i am concerned.

Chris

# Posted: 16 Jul 2005 10:41


How can i get connect to xbox live with Comcast High speed internet

gary

# Posted: 31 Jul 2005 00:04


for those of you trying to get ip addresses to access pc's on dhcp, i use dns2go from Deerfield, $30 a year or so for 6 "domain" names and i use prot forwarding enabled on my pc. this allows me to connect remotely to my home network from anywhere using rdp and / or vnc viewers. i also do this for a network i support for a small business. works great, ip address is provided by your client pc thru a service that sends a "heartbeat" to the deerfield servers. the deerfield serveres run the dns for directing to your most recent ip address. problem solved!

Anonymous

# Posted: 4 Aug 2005 15:57


It really amazes me that you folks just want to cheat the ISP so that you dont have to pay. You are willing to rip of you upstairs neighbor so you dont have to pay. Why not just do itthe right way and then you will not have thses connection issues or speed issues.

Juat imagine of th revenue was not in place tp bring broadband into your community in the first place.

I wonder how you would feel if you were the owners of Comcast.

besticandu

# Posted: 6 Aug 2005 05:46


chris get a router.
And anonymous sign up at dyndns.org to monitor and update dns with your dynamic ip.Otherwise do as i do and deal with it and change your own dns when your ip changes.

besticandu

# Posted: 6 Aug 2005 05:46


chris get a router.
And anonymous sign up at dyndns.org to monitor and update dns with your dynamic ip.Otherwise do as i do and deal with it and change your own dns when your ip changes.

Anonymous

# Posted: 7 Aug 2005 20:42


to the person who questioned about getting connected to comcast internet wirelessy. All you need is a wireless rounter connected to the modem, but the outputs has to come out fromt he router after then, and sinc eyour laptop has a wireless card, it will automatically pick the signal... If you are sharing files between the pcs, then you need to secure your network by locating your rounters ip... You can obtain that from the router's manual...

good luck...

Anonymous

# Posted: 14 Aug 2005 04:24


1st I have never seen any cable company use a dynamic ip !!!!!!!
sure most of there idiots will say what they have but you must realize that most of there techs have an 8th grade education or less...
99.9% of all cable customers get a static ip witch is crap for security.
As for your problem You need a router and some cat 5 cable or another option is a wireless hub and 2 usb wireless adapters.
I recommend the usb adapters so you can position them closest to the hub. ie put the hub close to the floor and the basement usb adapter closest to cieling...

. 1 . 2 . >>
This topic is closed. You can't post a reply.
 
Free Motorola Surfboard Cable Modem Offer! FREE CABLE MODEM! When You Order Internet Service with Comcast, Cox or Charter




Cable Modem Home | Cable Service | Topics | Modem Information | Broadband Sites | Download Guide | User Support | Contact Us
All content published by Cable-Modem.net, Chicago, IL, USA.
© Copyright 2009 Cable-Modem.net. All Rights Reserved
PRIVACY POLICY | Terms of Use

Powered by forum software miniBB™ © 2001-2006