Roadrunner Cable Modem + Airport Extreme = limited internet :(

I am having trouble gaining full internet access with my Time Warner (Roadrunner) cable modem. They use DHCP to configure TCP/IP, and I need a publicly visible static ip. I have tried many different things to get this to work, but so far nothing. Anyone know how (or if) I can get this to work?
Would be very helpful to know what Roadrunner SoCal limits with their residential service. I cannot find this on their website, and the rep I spoke with said they block nothing. I'm not sure if this is true.

cshamis wrote:
Please, pardon if this is remedial networking for some of you:
It was really helpful, thanks!
The problem is that the airport extreme is "in front of" your computer. So that when Internet services (like BitTorrent) try to connect to your machine (which is expecting them), they hit the Airport first, (which is NOT expecting them)... since it doesn't know what to do with them, it throws them away.
So I know you go on to explain how to let this traffic through, but should I place the airport in front of the modem (I dont even know if this is possible)
The reason why things like WWW work, is because the Airport isn't completely brain-dead. It knows how to "follow a conversation" and it essentially eaves-drops to all outgoing connections from your computer. If your computer deliberately asks for a response, then the Airport extreme "knows enough" to send the expected response back down to your computer. This magic all happens automatically for things like your email, web, ftp, etc.etc... because these services all follow a "back-and-forth" communication model.
The problem with protocols like BitTorrent (or running your OWN webserver for example) means that, you never know who is going to come knocking. It's not that the Airport is denying these "visitors" so much as, it wasn't told that anyone was coming.
To fix the problem you need to tell the Aiport extreme to roll out the welcome mat, and also... you need to the the Airport *where to send these visitors* That is what you do with the NAT port maps. This is how you tell the airport, when somebody comes and knocks on this door, send them to my PC. (Not, my laptop, or my iPhone, or my printer, or anything else that may be on the network: send them to my PC) After all, it is the PC that would be running BitTorrent, or Unreal, or a webserver, or ICQ, or what-have-you...
So now all you have to do is find out the IP of the machine you want to send the traffic to, and then you need to find out what PORTS that traffic arrives on.
For example... if you wanted to run a webserver on your home machine at internal ip: 10.10.10.2; then you would tell the Airport to route all incoming traffic on port 80 (the HTTP port) to internal address 10.10.10.2 (your PC). And that's it.
It has been my experience that BitTorrent uses the following ports:
tcp 13405
udp 13405
tcp 6881-6999
udp 6881-6999
TCP and UDP are two different flavors of internet traffic, and there is a section in the NAT redirections that allow for each... make sure you place them in the proper places.
Hope that helps. If it doesn't, let me know and I'll email you a screenshot of what the config page should look like.
I had already set things up this way ... and it does work, sort of. But I find that in some cases a mere 25% of my attempts to communicate out/back succeed. So I would love to take you up on the offer to send screenshots. Thank you so much for all the help!

Similar Messages

  • Need expert cable modem airport extreme advice

    I have been on hold with Comcast for an hour and so far no end in site. So I thought maybe someone here might be able to help me.
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  • Airport Extreme Slowing Internet Connection

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    I ran the test again with the following results:
         Client Side: [  4]  0.0-60.0 sec  497408 KBytes  67909 Kbits/sec
         Server Side: 0.0-59.7 sec  497408 KBytes  68253 Kbits/sec
    No Change.
    I then discovered that under "Wireless Network Options..." my checked "5GHz Network" had become unchecked. I re-checked this box and connected both server and client computers to this new network and re-ran the test:
         Client: [  4]  0.0-60.1 sec  392192 KBytes  53496 Kbits/sec
         Server: 0.0-60.1 sec 392192 KBytes  53476 Kbits/sec
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    HOWEVER, now when I run an internet speed test, I'm consistently getting ~28mbps down/~6mbps up across all devices (mac mini, macbook).  I'm sort of unclear as to what's causing this change, but it appears, at least for the time being, that the issue has resolved.
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    I don't have a DSL or cable modem to access the Internet ... just a mobile WiFi (there is no cable available at our house and the mobile WiFi is our only option). How do I connect my Time Capsule to the Internet via the mobile WiFi?

    LOL!!
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  • New  cable modem, airport  has green status, still NO internet connection??

    Airport extreme worked amazing with macbook for 8 months! One day my cable modem was no longer working. Had internet provider come and install a new modem.
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    Message was edited by: jmorosoff

    Your cable modem needs a complete reset to clear its memory.
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    If no luck, power down the modem for 2 hours and try the procedure again.
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  • Roadrunner, motorola sb5100 cable modem & airport..how do I get it to work?

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    connect to the WAN port. From the Mac connect to the
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    wait 30 seconds, turn on the base station, wait 30
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    I have also discovered the cable modem interferes with my ability to configure the base station(or modify the configuration).
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  • My mac pro laptop cannot access the internet which is cable thru airport extreme any suggestions

    My Mac pro cannot access the internet cable but is connected to wi fi thru airport extreme. my apple desktop works fine on the system and sits next to my laptop. any suggestions

    "I have an ethernet cable in port 1 on my computer. That is configured manually to access ther office network."
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  • Airport Extreme blocking internet on phone and ipad but not imac

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    However after much fiddling around with it I managed to get it working again with my computer.
    So now I have wireless internet on my computer, but although the router is recognized by my ipad and my phone it won't connect them to the internet.
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    Cheers

  • Airport extreme no internet, though light is green

    Hi,
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    Alte.

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  • PC - Cable Modem - AirPort Express

    Please excuse my ignorance, I’m new to apple. At home I have a PC with a cable modem. I know that I can connect the Ethernet to Airport Express but will I still be able to have to have access to the internet via my PC (my PC is not wireless capable)??
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    Simple answer - no.
    If your cable modem is connected to the Airport Express ethernet port, all your computers must have wireless interface adapters in order to access the shared internet connection.
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    Hi i just purchased my airport extreme base station. I tried connecting it to my windows xp for internet and so i can have wireless connection to my macbook.
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    HP 1240n Windows XP Macbook
    HP 1240n   Windows XP   Macbook

    Ace83, Welcome to the discussion area!
    I tried connecting it to my windows xp for internet...
    The cable modem should be powered off and connected to the WAN port on the AirPort Extreme base station (AEBS). The PC should be connected to one of the AEBS's LAN ports.
    Configure the AEBS to use the same settings as the PC was using to connect to the Internet. The PC should now be configured to use DHCP and Ethernet to get on the Internet.

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    LVennell wrote:
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  • Airport Extreme Losing Internet Connection (Only)

    I have been trying to troubleshoot a random internet connectivity problem for over a month now.  I feel like I've eliminated almost every possible cause, but still no fix has been found.  Here is my configuration:
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    Something like iStumbler, http://www.istumbler.net/ , will display other visible wireless networks, so that may provide a few clues, but cordless phones, security systems, etc., will not be displayed. You need professional scanning equipment for things like that.
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    If the problem is intermittent in nature, then it may likely be the result of cordless phone conversations that are active at the time.

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