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can't connect to the server

348 Views 4 Replies Latest reply: Apr 24, 2012 8:30 AM by upctry2 RSS
upctry2 Level 1 Level 1 (0 points)
Currently Being Moderated
Apr 24, 2012 6:51 AM



This past weekeend our comcast modeum died, they had to repalce it. Back up and running. But I can no longer connect

to the server from any other computer on the network. I tryied pinging it from utility but 100% loss.


What to do next.

Thanks for the help.



  • MrHoffman Level 6 Level 6 (11,710 points)
    Currently Being Moderated
    Apr 24, 2012 7:56 AM (in response to upctry2)

    Not much detail to go on, there.


    As a start, I'd call Comcast and ask them what they did (or didn't) do here.


    Some questions...


    Is this device a modem, or is it (also) a NAT, IP router, DHCP server, and firewall device; a gateway?


    Are you attempting pings and connections to the server from the local network, or are you attempting pings and connections from a remote host out in the Internet?


    Are you using the gateway device (if it's a gateway that you have, and that got swapped) for DHCP, routing and related tasks?  If so, then those settings will need to be recreated.


    Modems that aren't configured right don't pass connections to the remote network.  Gateway devices provide more capabilities, and a failure to copy the old settings to the new device (because, for instance, the old device was dead) leaves you with the need to recreate the settings in the new gateway.


    If somebody configured this network or this gateway for you, consider calling them in again.

  • MrHoffman Level 6 Level 6 (11,710 points)
    Currently Being Moderated
    Apr 24, 2012 8:20 AM (in response to upctry2)

    From what I see on the net, Various Arris Cable Modem devices are gateways.  And if you were using the failed device as a gateway, then the new device probably doesn't have the proper settings for your local network; IP subnet, DHCP, DNS server, etc.  Any of these can be wrong, and it'll look like an outage.


    Most of the following might not help you as I'm inferring that you're not particularly familiar with IP networking.  If that's the case, then I'd suggest getting somebody in to help you resolve this.


    Some (more) questions.


    Which model Arris cable modem device?


    How is the Airport Extreme device connected to the server?  Is it a wired connection, or wireless?


    How is the Airport Extreme connected to the Arris device?  Wired, or wireless?


    Is the server configured at a static IP address?  (It should be static, but I've seen folks try to use a dynamic address for a server.)


    Is the Airport Extreme configured as a WiFi router (as was implied by your note), or is it configured and operating in a bridged (access point) configuration?


    It would appear there is a network misconfiguration here; IP subnet setting, network mask, DNS server (which would usually be your local OS X Server box, if you're running OS X Server here and not a Windows or Linux or other server), or DHCP setting.  Or there's no connection between the Airport Extreme device and the server; somebody's possibly left a wire dangling.  What the details of that configuration error or the particular network set-up here might be, (sorry) I don't know.


    Again, if you're not familiar with IP networking, then I'd suggest getting somebody local in to help re-establish your network.


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