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Cellular Phone Forum / Providers / Cingular / September 2005Cingular Port Blocking on EDGE Network?
It appears Cingular blocks certain ports on their EDGE network. I have an EDGE wireless card. It appears that Cingular blocks some UDP ports and TCP ports. When I establish an EDGE connection I cannot use a specific application called "Echolink". That application is described below. Echolink is a VoIP program for radio Amateurs (Ham Radio Operators) to use to contact each other via the internet. Enclosed is a description of the ports the program uses. EchoLink requires that your router or firewall allow inbound and outbound UDP to destination ports 5198 and 5199, and outbound TCP to port 5200. Source ports are dynamically assigned. If you are using a home-network router, you will also need to configure the router to "forward" UDP ports 5198 and 5199 to the PC on which EchoLink is running. This can be summarized as: Allow UDP (source port any, destination ports 5198-5199) from Internet to PC Allow UDP (source port any, destination ports 5198-5199) from PC to Internet Allow TCP (source port any, destination port 5200) from PC to Internet My primary purpose in purchasing our Cingular Wireless EDGE card was to use the Echolink application. Web surfing and email are secondary uses. The only way I can use Echolink is to open a VPN connection with my current employer. I can use Echolink only when I have the VPN connection running. Problem is that I plan to retire next year and it will no longer be available. Does anyone know who to contact at Cingular to inquire about port blocking? The droids at 611 were clueless. TIA >It appears Cingular blocks certain ports on their EDGE network. Depends on your service: Data Connect (more expensive) is more complete than MEdia Net (less expensive).  SignatureBest regards, HELP FOR CINGULAR GSM & SONY ERICSSON PHONES: John Navas <http://navasgrp.home.att.net/#Cingular> > It appears Cingular blocks certain ports on their EDGE network. > [quoted text clipped - 33 lines] > > TIA Perhaps if you obtained a ham license, you could understand better about why Echolink is incompatible with a public cellular communication system. Signaturejer email reply - I am not a 'ten' >> It appears Cingular blocks certain ports on their EDGE network. >> [quoted text clipped - 36 lines] >Perhaps if you obtained a ham license, you could understand better about >why Echolink is incompatible with a public cellular communication system. Just what I needed today: a smart answer from some jerk somewhere in the world. FYI, I have been a ham for 30 years and I am an Extra Class operator. And for your information, the only way you can get Echolink is IF your a ham radio operator. Your a jerk! >>>It appears Cingular blocks certain ports on their EDGE network. >>> [quoted text clipped - 43 lines] > And for your information, the only way you can get Echolink is IF your a ham > radio operator. Bullshit. Warez has it for anyone who wants it, including every hacker in the free world. > Your a jerk! May be, but at least I know the difference between your and you're. Signaturejer email reply - I am not a 'ten' > Bullshit. Warez has it for anyone who wants it, including every hacker > in the free world. >> Your a jerk! > May be, but at least I know the difference between your and you're. I don't need to tell you what you already know. The use and distribution of warez software is illegal (as copied from: http://www.cscic.state.ny.us/msisac/webcasts/6_04/6_22_terms.htm). It is easy to infer from your writing what calibre of individual is posting here. >>Bullshit. Warez has it for anyone who wants it, including every hacker >>in the free world. [quoted text clipped - 6 lines] > distribution of warez software is illegal (as copied from: > http://www.cscic.state.ny.us/msisac/webcasts/6_04/6_22_terms.htm). I might be impressed if you could offer a tidbit as to why any hacker would care about the legality of any software. > It is easy to infer from your writing what calibre of individual is > posting here. Oh, I see, now you're gonna claim you actually know something about a book by looking at the cover? Run along child, go play with your toys. Signaturejer email reply - I am not a 'ten' >It appears Cingular blocks certain ports on their EDGE network. Undoubtedly. They don't want to permit BitTorrent traffic. >I have an EDGE wireless card. Cingular's Wireless Data Support Group may be found at 800-552-3373. https://support.cingular.com/cngapp/support/Support.do?tab=contact_us&mainTarget Include=contact_us/report_incident.jsp allows you to log in and make signal drop and other technical reports. >It appears that Cingular blocks some UDP >ports and TCP ports. When I establish an EDGE connection I cannot use a [quoted text clipped - 31 lines] > >TIA -- John Bartley K7AAY USBC/DO PDX OR USA "This is a carburetor," Hank tells his son. "Take it apart, put it back together; repeat until you're normal." - KOTH >>It appears Cingular blocks certain ports on their EDGE network. > [quoted text clipped - 6 lines] >https://support.cingular.com/cngapp/support/Support.do?tab=contact_us&mainTarget Include=contact_us/report_incident.jsp >allows you to log in and make signal drop and other technical reports. [snip] John, Thanks for the reply. I'll follow up on the information you provided. Really appreciate your response and the info. 73, de WD6AEI In <4329b4ed.162676984@coronis.nyed.circ2.dcn> on Thu, 15 Sep 2005 18:18:27 GMT, johnbartley@email.com (John Bartley K7AAY telcom admin, Portland OR) wrote: >>It appears Cingular blocks certain ports on their EDGE network. > >Undoubtedly. They don't want to permit BitTorrent traffic. My own tests of MEdia Net (in Northern California) work on BitTorrent upload, but suggest that Cingular is filtering (blocking) the default BitTorrent download port. What that is easily circumvented by configuring a different download port, I don't think BitTorrent is an appropriate use of the service. >Cingular's Wireless Data Support Group may be found at 800-552-3373. > >https://support.cingular.com/cngapp/support/Support.do?tab=contact_us&mainTarget Include=contact_us/report_incident.jsp >allows you to log in and make signal drop and other technical reports. That says "Help for Former AT&T Wireless Customers" SignatureBest regards, HELP FOR CINGULAR GSM & SONY ERICSSON PHONES: John Navas <http://navasgrp.home.att.net/#Cingular> > If you are using a home-network router, you will also need to configure > the router to "forward" UDP ports 5198 and 5199 to the PC on which > EchoLink is running. That's the piece that's broken. Where would you configure the Cingular network to forward those ports? They aren't blocking those ports, per se, you just don't have any way to direct traffic inbound to your phone. Could you get the program to work via WiFi if you are in a public hotspot? Could you get the program to work on your own router, if you didn't have administrative access to the port forwarding table in the router? Signature--- Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8,-122.5 >> If you are using a home-network router, you will also need to configure >> the router to "forward" UDP ports 5198 and 5199 to the PC on which [quoted text clipped - 3 lines] >network to forward those ports? They aren't blocking those ports, per se, >you just don't have any way to direct traffic inbound to your phone. Port forwarding is necessary only over NAT/PAT, as in the case of a home networking "router" -- standard network routers pass all unblocked traffic. Hence this wouldn't be an issue for cellular. SignatureBest regards, HELP FOR CINGULAR GSM & SONY ERICSSON PHONES: John Navas <http://navasgrp.home.att.net/#Cingular> > Port forwarding is necessary only over NAT/PAT, as in the case of a home > networking "router" -- standard network routers pass all unblocked traffic. > Hence this wouldn't be an issue for cellular. I presumed that Cingular was providing a NAT address. I thought I saw my ipconfig address as being different from the address reported by dslreports. I might be mistaken. Some hotspots that I have visited have given 192. addresses, and I have presumed those to be NAT as well. The only inbound connection that I tried to my tethered PC was iperf, and that didn't connect. I didn't try anything other than the default port. Signature--- Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8,-122.5 >> Port forwarding is necessary only over NAT/PAT, as in the case of a home >> networking "router" -- standard network routers pass all unblocked traffic. [quoted text clipped - 6 lines] >Some hotspots that I have visited have given 192. addresses, and I have >presumed those to be NAT as well. That Cingular is assigning private IP addresses doesn't necessarily mean that PAT (Port Address Translation) is being used -- with one-to-one mapping there would be no sharing of the public IP address, and thus no port translation (or special forwarding) would be needed. >The only inbound connection that I tried to my tethered PC was iperf, and >that didn't connect. I didn't try anything other than the default port. I've now done some testing, and inbound connections won't work, so it seems that Cingular is indeed using NAT/PAT rather than one-to-one mapping. My apologies for my erroneous statement (in the top quote above). SignatureBest regards, HELP FOR CINGULAR GSM & SONY ERICSSON PHONES: John Navas <http://navasgrp.home.att.net/#Cingular> > I've now done some testing, and inbound connections won't work, so it seems > that Cingular is indeed using NAT/PAT rather than one-to-one mapping. My > apologies for my erroneous statement (in the top quote above). Someone suggested that WAP.cingular.com is NAT, and ISP.cingular.com is direct addressing. Signature--- Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8,-122.5 >> I've now done some testing, and inbound connections won't work, so it seems >> that Cingular is indeed using NAT/PAT rather than one-to-one mapping. My >> apologies for my erroneous statement (in the top quote above). > >Someone suggested that WAP.cingular.com is NAT, and ISP.cingular.com is >direct addressing. In other words: WAP.cingular.com = MEdia Net, NAT/PAT* ISP.cingular.com = Data Connect, public IP * which would explain why some forms of VPN don't work. SignatureBest regards, HELP FOR CINGULAR GSM & SONY ERICSSON PHONES: John Navas <http://navasgrp.home.att.net/#Cingular> |
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