No internet from grandecom cable modem

I have a Wrt54gs wireless router, Ubee DOCSIS 2.0 cable modem U10C018. My isp is grandecom.net.
I have cloned my pc's mac address and can connect to grandecoms systems with my router. (ie the wan interface obtains a 24.155.x.x address)
I can't connect my internal pc's to the internet.
I use a class c internal network  192.168.1.x
my linksys internal ip address is 192.168.1.1
the ubee can be ping internally at 192.168.100.1
what should my routers  gateway be set to?
I have tried 192.168.100.1 and many others. including 24.155.x.x variations
Any help appreciated.
Message Edited by BigA1 on 03-01-2010 08:17 PM
Message Edited by BigA1 on 03-01-2010 08:17 PM
Solved!
Go to Solution.

If the WRTs gets a public IP address 24.155.*.* from your ISP then the router configuration is correct. Check the Status page in the web interface.
Do those computers use DHCP?
It's probably best if you open a command prompt window on your computer and enter "ipconfig /all". Copy the full output into your response. That should show your current IP configuration on the computer.
The gateway IP address in your LAN 192.168.1.* is 192.168.1.1.
Message Edited by gv on 03-02-2010 09:54 PM

Similar Messages

  • Older Airport express won't see the signal from the cable modem.

    Older Airport express won't see the signal from the cable modem.
    My macbook sees the AP express and I can stream music to it but no internet. If I plug the ethernet cable directly into the macbook I can see the internet

    Anytime you change networking hardware, it is always a good idea to perform a complete power recycle of your networking components.
    I would recommend that you do the following as a minimum:
    Power-down the modem, AirPort base station, and computer(s).
    Disconnect the AirPort base station from the Internet broadband modem.
    While all of the devices are powered-down, perform a "factory default" reset on the base station. This will get it back to its "out-of-the-box" configuration and make setting it up much easier, especially if you use the "Assist me" process within the AirPort Utility. (ref: Resetting an AirPort Base Station or Time Capsule)
    After the base station resets, go ahead and power it back down.
    Reconnect the AirPort base station to the Internet broadband modem. For the Extreme and Time Capsule, be sure to connect the cable to the base station's WAN (circle-of-dots) port.
    Power-up the modem; wait at least 10-15 minutes to allow it adequate time to initialize.
    Power-up the AirPort base station; wait at least 5-10 minutes. Note: The AirPort's status light may continue to flash amber after it has intialized. That is because, there may be some additional configuration items necessary, like setting up wireless security, before the overall setup is completed to get a green status.
    Power-up your computer(s).
    In this basic configuration, the AirPort base station will broadcast an unsecured wireless network with a Network Name (SSID) of Apple Network NNNNNN. Network clients, connected to the base station either by wire or wireless, should now be able to access the Internet through the ISP's modem. Once Internet connectivity has been verified, you can use the AirPort Utility to configure the base station for wireless security and any other desired options. Please post back your results.

  • Public and Priviate network from same cable modem - more questions please

    A couple of weeks ago I asked about having both a privite network and a public wireless network that would work from one cable modem. The requirement is that the private network not be seen or be "hackable" by users on the public network.
    Duane gave us the approach to use and we think we have it right, but because the security of our private net is so important, we want to make sure. We will not do the public network if the security of our private network is in danger.
    Here is how things look:
    Cable modem --> Router 1 WAN port
    Router 1 regular ports --> Private Network -and- Router 2 WAN port
    Router 2 regular port --> AirPort Extreme WAN port
    We have our public network set up as WPA Personal and we broadcast the network name. The password for this network will be shared wiith users as they enter our public area where they can use their PCs. The default login/password on both routers and the AirPort Extreme have been changed. Connecting via AirPort to the public network I can see Router 2 but not Router 1 or any of my computers, printers, etc. when I browse the network via the Finder.
    Do I have it right?
    Does this setup give users on the public network any way to get to my private network, computers, and files? Are there any tests/experiments that I could run to further validate this setup?
    How secure is it?
    Am I asking for problems by offering a public network that shares some of the resources of the private network - modem, MAC address, IP addresses of routers, etc.
    From the public net we have attempted to use the IP addresses of the computers on the private network without success.
    The best answer I could receive is that there is no way to hack the private from the public. If this is not the answer, how secue am I.
    Tim

    When you state "Router 1 regular ports(8) feeding Private Network..." do you mean that there is another private router or are the private clients directly connected to router 1?
    If you have a private router, the public devices connected to the AirPort Extreme base station (AEBS) could address and reach anything on Router 1 including the private router's WAN side.
    The firewall in private router should block any of the public access to clients of private router. So any traffic from private router should be safe as long as the public has no physical access to router 1 nor router 2's WAN port.
    If the private clients are directly connected to router 1, then the public clients can directly access any of your private clients. The traffic among private clients and from private clients to Internet would be secure (as long as my previous note about physical access is true).

  • How to create 2nd Wifi Network from one cable modem

    Hello, I am trying to create a 2nd wireless network from one cable modem.  Currently I am using an Airport Express connected to the cable modem.  I also have an unused Airport Express that I would like to use for the 2nd network.  The Motorola modem has only one network cable port in the back.  I am currently using Time Warner as my service provider.  Can someone tell me if a network switch would suffice or would I need a new router, and how would I set them up?  Thanks.

    Unfortunately you will not be able to create two separate Wi-Fi networks with the current models of the AIrPort Express that you have. You would need at least one 2nd generation Express and one 1st generation Express to do so.
    The 2nd generation Express would be connected directly, using Ethernet, to the Internet modem, and the 1st generation Express would be connected, via Ethernet to the 2nd gen. In this configuration each Express could be configured to provide a separate Wi-Fi network with each using a different security type.

  • Why am I getting 2 IP addresses from the cable modem?

    I recently renewed my IP address for my cable modem (by booting into Windows and doing the ipconfig thing). It did this successfully and assigned me a new static IP.
    However back in OS X I am now getting two IP addresses depending on whether I connect by ethernet or Airport. When I connect my MacBook straight to the cable modem by ethernet it gives me the new IP address. However when I connect the Airport Extreme Base Station to the cable modem and do all the relevant restarting, it insists I still have the old IP address. This can't be right. Is it an errant preference hanging about in the Base Station? I have tried restoring it to default and setting up from scratch but it persists.
    I know the difference between public and distributed addresses... the two I'm talking about are the public kind (e.g. 82.114.223.43 etc)

    What do you mean by "old" and "new" IP addresses? What TYPE of IP addresses are you talking about? Specific numbers for example?
    In general, the typical cable modem set up should work as follows: your ISP will assign an IP address to your cable modem. This IP address can be permanently fixed (static) or occasionally change (dynamic) - whether you get a static or dynamic IP address depends on your ISP. This IP address is considered your "public" IP address.
    What you plug in directly after the cable modem will take on this IP address, since the cable modem merely passes on the IP address info (and serves no routing functions). So, if you plug in your MacBook directly to the modem, your MacBook will take on the IP address that your cable modem passes through, as assigned by your ISP; only your MacBook will have internet access.
    On the other hand, if you plug in to the modem a router, such as Airport Extreme Base Station, the router will be assigned the "public" IP address received from the cable modem on its WAN (wide area network) side, i.e. the "side" that interfaces with the public Internet. When your router is set up to SHARE this one public IP address with multiple computers/clients, it has to create a private sub-network, otherwise known as the LAN (local area network). Whether you plug computers in via ethernet to the router, or connect wirelessly to the router (or even both!), your router will create IP addresses for each of its LAN clients so that it can identify everyone. As long as the client has a different hardware MAC address, the router will assign it an unique IP address. (That's why you had 2 IP addresses for your MacBook - one for the ethernet connection, and the other for the Airport connection - each network interface having a different MAC address, and thus receiving a different IP address from the router.)
    Your router will always maintain its WAN IP address, as long as your ISP gives you that IP address (via your cable modem). However your MacBook, Windows and other clients may be assigned different LAN IP addresses depending on how you configured your router's DHCP server settings. The LAN clients in the context of your subnet would NOT be assigned the router's public WAN IP address when the router is set up to share that connection.
    If you understand the whole WAN v. LAN IP addressing thing, but you're not getting the results you expect, try powering off EVERY single piece of equipment on your network. Wait several minutes so that everything is cleared from the equipments' memory. Then power on and wait until the equipment is in ready state, in this sequence: 1-cable modem..., 2-main router (AEBS)..., 3-remote bases/bridges (if any)..., 4-computers and other client devices.

  • IMac Model 10,1 cannot connect to Internet, either with cable modem of Airport. Solutions?

    iMac 10,1 cannot connect to internet via cable modem or Airport plugged into cable modem.  MacBook Pro, iPad and iPod are fine.  Reinstalled OS10.6.3with no results.  Ideas on where to go next welcome.

    Hello,
    Though all of these steps may or may not be needed, I'm including them all.
    Make a New Location, Using network locations in Mac OS X ...
    http://support.apple.com/kb/HT2712
    10.5, 10.6, 10.7 & 10.8…
    System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
    10.5.x/10.6.x/10.7.x instructions...
    System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
    The interface that connects to the Internet should be dragged to the top of the list.
    If using Wifi/Airport...
    Instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
    For 10.5/10.6/10.7/10.8, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
    208.67.222.222
    208.67.220.220
    (There may be better or faster DNS numbers in your area, but these should be a good test).

  • AE Lost Internet Connection through Cable Modem

    I suddenly lost all internet connectivity. Here's the setup and issues:
    -- Two computers, a Mini and a PowerBook, both lost connection to Internet
    -- Motorola cable modem (using Comcast)
    -- Airport Express is connected to modem via ethernet
    -- I can connect directly to the cable modem with the computer via ethernet and I can get internet service; also, Comcast assured me I still have service
    -- The two computers can connect to each other via airport; file sharing, iTunes streaming, etc., works as usual
    -- I've done all the usual "unplug everything and restart" routines
    -- Nothing was changed recently that I can think of - it just lost connection to the Internet.
    Any ideas?
    PowerBook G4 17 1.67GHz 1.5Gb   Mac OS X (10.4.6)  

    I fixed it, but I don't know if it will solve the problem Ada had. I got a note from Comcast recently saying I needed to have my IP settings to be dynamic, by using DHCP. I had already made that change so didn't suspect that was the problem. However, after looking closely, I found some things to change.
    If you're using Comcast, or a similar service, then this may fix it:
    I first went out and washed my car, then came back in. I think that's an important step. I have a large car, so if yours is small, you may need to wash it twice, or wash it then wax it. Then go back inside and . . .
    In Airport Admin Utility, select your base station, then Configure.
    Switch to the Internet tab.
    Make sure it's set to Configure using DHCP
    Make sure DNS Servers, Domain Name, and DHCP Client ID are left blank (this is the step I hadn't done before).
    Click Update and close the program and wait for your base station to reset.
    This should fix it.

  • Losing internet connection (Ethernet, cable modem)

    Hi,
    Lately (the past month or two), I am tending to lose my internet connection. (I never would before.) I connect via Ethernet to my cable modem. My ISP tells me that if I am getting 4 steady lights on my modem (with the 5th flickering), it isn't the modem. (I was thinking of replacing it.)
    Rebooting the computer will fix it. One minute it's fine, the next it may have lost the connection. When I lose connection, Network Diagnostics* says my built in ethernet and network settings are ok (green). The rest will vary (going on memory here), ISP, may or may not be green, Internet and server will be definitely out, when this happens.
    * I have dragged it out of wherever it was buried and have it now on my desktop. It is VERY convenient to check what is going on with my connection problems. (I guess I have created an applet?) I recommend this to all.
    I am considering re-installing the OS (archive and install) but am hoping someone can offer some suggestions for me to try short of that.
    Disk Utility and Tech Tool Deluxe don't indicate any problems. I can try the Apple Hardware Test. I am hoping this isn't a hardware issue as I cannot afford a new Mac or other repairs. I can live with rebooting if I have to.
    Thank you.
    John L

    The colors refer to what Network Diagnostics shows. Network Diagnostics is an Apple app that pops up when Safari has trouble connecting. I don't use Safari but loved having Network Diagnostics pop up so I figured out a way to use it independently of Safari. I dragged it out of wherever it was buried, put it on my desktop where it became an app and I use it at will to see why I am not connecting.
    It will show green, yellow or red as an indication of each aspect of the connection: built in ethernet, network settings, ISP, Internet and server (being Apple's server). Right now, all are green. When I can't connect, I'll have several going from server backwards that are red. If it can't figure out the status I get a yellow light.
    When I've asked my ISP why I am getting disconnected, they said if all 4 lights of the modem are steady (and the yellow one flickering), which they always have been when I've been disconnected, then it isn't the modem or them. They have good tech support and I trust them.
    I have replaced the modem once in the past and that fixed things. I may do it again.
    So, I don't know. I haven't tried the Safe Mode approach yet. I'll see if I can do that.
    Cheers,
    John

  • Intermitent Internet connection to Cable Modem

    Internet connectivity was working great. Then I switched Internet access to DSL and thus converted Linksys WRG54G connection to a DSL modem. Due to poor speeds with the DSL, I have moved back to cable. Now the connectivity to the Internet drop from the Linksys router every few hours. Connectivity to the cable modem seems to be fine.
    What reprogramming am I missing for the router. It is set up exactly as the direction require.
    Thanks

    Follow this link and if you are using to configure your router.

  • MBP connects to internet directly via cable modem, but airport wifi not working

    Today I came home to a broken wifi. I think Time Warner Cable had an outage in my area which confused my modem and airport router, but anyway. After a short while I was able to connect to the internet if I plug the cable directly from the modem to my laptop (which is how I am currently posting this question). But if I instead connect the cable to my airport and try to connect via my usual wifi network, I don't have any internet.  Here is what I have tried:
    - cycle cable modem several times
    - hard reset as well as factory reset of Airport
    - trying to connect the cable modem to the airport via both WAN and Ethernet entry, power cycling the Airport, waiting several minutes on each to see whether I get internet
    - Using Network > Assistant to create a new location and network
    Under airport utility, the status messages I get are as follows:
    - Internet Connection (tells me to cycle my cable modem, which I have tried)
    - No DNS Servers (I haven't touched any DNS addresses, but this has never been an issue that prevents me from connecting to wifi)
    - Ethernet unplugged (since I'm using the cable to write this message...)
    My hardware is:
    - MBP early 2011
    - ubee cable modem (standard issue from TWC)
    - Airport Express 802.11n (2nd generation).
    My laptop is able to connect to other wifi networks, so that is not the issue.
    Any help or advice is appreciated.

    ...And now it all of a sudden works. However, as I can't delete this post I hope others who have had similar problems may have solutions for future issues.

  • My 3000H will no longer connect to the internet via my cable modem - help please.

    I have 3 computers and a media server on a Linksys router with a Comcast cable modem. Everything AOK. 3 weeks ago my Lenovo 3000H shut down and rebooted for no reason. Then I began getting popups while I was on the internet saying that I needed to click on a button to make a dial-up connection. I would hit X or Cancel to make it go away. It happend more frequently and other related popups started, but I could close them and continue normally. Last weekend It happened again but I lost my connection to the internet and it would not reconnect. Now I get a big error message "Connecting through Wan Miniport(PPPOE)... Error 815: The broadband netowrk connection could not be established on your computer because the remote server is not responding. This could be caused by and invalid value for the "Service Name" field for this connection. Please contact your ISP and inquire about the correct value for this field and update it in the Connection Properties..
    I called Comcast. They don't have a clue what Error 815 is. I have changed every cable, rebooted the modem, router and all computers countless times, and reset the modem per Comcast. I have taken the router out and connected directly into the Lenovo. I have gone through every screen related to broadband connection to no avail although, being a beginner, I see screens that I have no clue what they do.I have a couple of friends and a Comcast fellow who tried to walk me through the steps they thought would restore my connectio. No luck.
    Can anyone walk me through the necessary steps to get me back to ground zero and then through the steps to reestablish my broadband connection?
    Help Please?

    Emma-
    In Safari, press on the Bookmarks icon and select History.  Then press on Clear History at the top of that menu, and see it there is any improvement.
    If not, try unplugging your WiFi router for a few seconds.  Then reset the iPad's network.  Go to Settings-General-Reset-Reset Network Settings.  You will need to reconnect the iPad to WiFi.
    Fred

  • My Airport Extreme Disconnects From the Cable MoDem Every Few Minutes

    Hello,
    I start a new topic as my previous title was wrong and there was no suitable answer.
    I have had an Airport Extreme for 3 years and it sometimes disconnects after a few minutes. Actually, it more looks like that the Airport crashes: the "PC Link" light on the cable modem goes off, the Airport lights go off and I cannot find my Airport Network any more on my computer.
    When this happens, I can either unplug it from the power and plug it back in, or simply move the Airport around a little bit, and it will re-start. Sometimes the problem does not re-occur for a few hours or days, sometimes it keeps happening every few minutes and of course drives me crazy...
    Is it because ... :
    - ... my Airport has a faulty connection and I should replace it?
    - ... there are power surges in my electricity installation (eg this seems to happen when I or my neighbors have air conditioners on, I live in one of those old New York buildings with old electricity installations), and I should get an anti-surge device, or a newer Airport would deal with this better?
    - ... of something else? I tried replacing the Ethernet cable between the MoDem and the Airport and it failed, there does not seem to be a source of interference around my place.
    Thanks for your help!

    I have had similar problems. Not as bad as some of you but usually in the morning I discover that I have dropped onto someone elses wireless they are not as fast. Then I have to troop upstairs, unplug the Extreme, replug it and then everything is allright until the next morning. But it is sporadic. It has run fine now for a few days. This problem has persisted now for a year. And yes I have tried resetting it.
    Next month I plan on going to the big city and I am going to take my Extreme to one of Genius' at the Apple Store. I am curious if anybody else has tried that solution and how much it might cost.

  • 10.5.6 setup on mini with USB nic, not receiving DHCP from WAN (cable modem

    Hello,
    I'm probably in a little over my head thinking I could configure MacOS X Server without much IT knowledge. But I started, so I'm not giving up yet.
    Here's my setup:
    — cable modem ethernet connects to USB nic (the apple macbook air one) plugged into mac mini running 10.5.6 Server
    — ethernet on mac mini connects to switch
    — switch connects to airport base station set-up as bridge
    — in the future other computers will connect over ethernet to the switch (that's why mac mini isn't plugged into base station directly)
    Here's the issue:
    — cable modem uses DHCP (no fixed IP).
    — when first installing 10.5.6 Server, modem was connected directly to ethernet on mac mini, and picked up everything from DHCP, worked fine. Ran all the system updates (started with a 10.5 initial install)
    — after everything was installed, I switched the modem to the USB ethernet adapter and ran NAT setup assistant. configured the USB Ethernet as the WAN, Ethernet as the LAN, turned on VPN.
    — now the USB Ethernet won't pick up the DHCP of the WAN anymore. It did it once, and then never again.
    — I've run the NAT setup assistant to switch the WAN and LAN nics to see if the USB Ethernet was the issue, but with the same results.
    — This setup used to work although not quite stable on 10.5.4 server.
    My initial questions:
    — is the firewall blocking the DHCP?
    — is the LAN DHCP messing with the WAN?
    — in the previous version I had to set the replythresholdseconds from 10 to 0 in the bootpd.plist for it to hand out DHCP on the LAN, but there is no such entry in the pootpd.plist anylonger, and the keynet_address entry that was missing from the previous version of bootpd.plist is now present, so it seems the bootpd.plist has been fixed by apple.
    — what am I doing wrong? Why doesn't this just work as advertised...
    I know there are several of you out there that have the same setup working (I found posts from hirstey and DigiAngel with the same setup) so it must be possible. All your help is much appreciated!!
    Thanks,
    Hagenaer
    Thanks!
    Message was edited by: Hagenaer

    Thanks for your reply, DigiAngel.
    DSL modems differ from cable modems as far as I understand. Where DSL modems are actually routers capable of NAT/DHCP, cable modems are just a network interface/brigde and can't do any of that. So it should pass the external IP to the computer. I'm writing on a laptop with the cable modem directly plugged into it, and it picked up the external IP etc. near instantly. The mac mini did the same before I ran the NAT setup assistant. I believe it picked it up once after that, but never since.
    I had done a clean install, had the ethernet plugged into its internal ethernet port (en0) and was able to download all the system updates. Then plugged in the USB ethernet, I'm pretty sure it still picked up the IP there. Ran the NAT setup assistant and can't get anything to work anymore. Even with all services switched off.
    So the modem is doing its job, but when I connect it to the USB nic the connection gets a self-assigned IP in about 3 seconds after seeing the cable is connected. The one time I've seen it get the right IP, it got a self-assigned IP first and then about 5 seconds later picked up on the correct IP. (And it picked up everything, including DNS server and search domains, which this laptop I'm writing on does not, although it works just the same).
    Unfortunately, this laptop runs 10.4.11 which doesn't recognize the USB nic, so I can't test the adapter outside of the server environment. But I've had the genius bar test the adapter previously and it worked fine then, plus I've run the NAT setup assistant with the connections inverted (WAN over built-in ethernet, LAN over USB ethernet) with the same results: WAN gets self-assigned IP.
    I've also tried configuring manual IP for the WAN from what I saw was given to this laptop (it kept the same IP even after being disconnected/reconnected, so I guess the IP for my modem won't change IP unless I reset it. Although I'm not sure if it's correct logic to assume the mac mini would pick up the same IP as well since I think that's actually tied to the MAC address and the IP doesn't belong to the modem but to the computer behind it).
    Anyway, I'm not sure what to try next...
    Hm. Wait, this might have something to do with it: the firewall logs the following:
    Mar 22 14:12:07 server ipfw[4997]: 65534 Deny UDP 73.227.220.1:67 255.255.255.255:68 in via en 2
    Looking up 73.227.220.1 gives me dns1.inflow.pa.bo.comcast.net, clearly my provider's DNS server. Trying to get me an IP that my wirewall is denying? Turning off the firewall doesn't make it pick up the correct IP though... I have turned off all services and still just got a self-assigned IP.

  • Can't Get Legit IP Address From My Cable Modem

    I have narrowed down my problem.
    I cannot coax a legit IP address from my Charter cable modem. I'm using AirPort Admin Utility to no avail.
    Everything else in the system works perfectly...I have no problem networking between computers, or tapping into a different wireless system.
    The problem is getting an IP address that works. I have tried, one at a time, an AirPort Express, AirPort Snow and, finally, an AirPort Graphite. None could get the real IP happening.
    Of course, Charter claims "software problem". Maybe it is, but I certainly don't trust them!

    hi! Have you Physically powered off the Cable Modem and powered it back on? Connect your Cable Modem's network cable to the WAN port of your Airport. Unplug the power to both the Cable Modem and the Airport Base Station.
    Plug the Power Chord into the Cable modem first, then the Power Chord to the Airport Base Station.
    See if that helps,
    AL

  • Cant get my KN8 Neo 4 -F to get an internet connection through cable modem.

    I have a full signal since I checked with my other computer. I just built this system and I cant get a connection to the internet. Seems like the LAN isnt working.

    I dont think it's a mobo problem.
    There is something that went wrong setting up the conn.
    Try disabling firewall... both windows and Nvidia
    Open a command window ant type: ipconfig
    Check what u get.
    Is cable connected from modem to pc?
    Are u using router?
    Let us know plz.

Maybe you are looking for