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Hidden backdoor in my AT&T Gateway

  1. #1

    Hidden backdoor in my AT&T Gateway


    First going to tell how my network is configured, I use my AT&T Gateway for just my modem and firewall, and I use a Netgear router as an wireless access point. I ran a full port scan and found that port 3479 is open, is it an possible security risk, and if it is what can I do about it?

      My System SpecsSystem Spec

  2. #2


    Posts : 59
    Windows 8.1 Pro


    Yes, that port is used as a Remote assistance port by AT&T. So, they could potentially use it as a back door into your network.

    I would recommend closing it on the Gateway or blocking it on your Netgear. However, if you block it, some games such as Call of Duty won't work completely right.
      My System SpecsSystem Spec

  3. #3


    Quote Originally Posted by mattman View Post
    Yes, that port is used as a Remote assistance port by AT&T. So, they could potentially use it as a back door into your network.

    I would recommend closing it on the Gateway or blocking it on your Netgear. However, if you block it, some games such as Call of Duty won't work completely right.
    I can't close it, I got the Gateway blocking all incoming connections which should mean it's closed, and I tried to block it on the Netgear also but it still appears as open when I do port scans.

    Screenshots: Screenshot by Lightshot
    Screenshot by Lightshot
      My System SpecsSystem Spec

  4. #4


    Central IL
    Posts : 3,468
    Linux Mint 17.2


    Quote Originally Posted by Jcwisgod View Post
    First going to tell how my network is configured, I use my AT&T Gateway for just my modem and firewall, and I use a Netgear router as an wireless access point. I ran a full port scan and found that port 3479 is open, is it an possible security risk, and if it is what can I do about it?
    This again. There is no backdoor on the 2-Wire/Pace gateway. I really wish this false rumor would just stop and go away.
      My System SpecsSystem Spec

  5. #5


    Central IL
    Posts : 3,468
    Linux Mint 17.2


    Quote Originally Posted by mattman View Post
    Yes, that port is used as a Remote assistance port by AT&T. So, they could potentially use it as a back door into your network.

    I would recommend closing it on the Gateway or blocking it on your Netgear. However, if you block it, some games such as Call of Duty won't work completely right.
    Never going to happen, due to this supposed "Back door" is nothing more then a blank rumor. There is no open port for the techs to access on the RG's.
      My System SpecsSystem Spec

  6. #6


    Posts : 59
    Windows 8.1 Pro


    Quote Originally Posted by Jcwisgod View Post
    Quote Originally Posted by mattman View Post
    Yes, that port is used as a Remote assistance port by AT&T. So, they could potentially use it as a back door into your network.

    I would recommend closing it on the Gateway or blocking it on your Netgear. However, if you block it, some games such as Call of Duty won't work completely right.
    I can't close it, I got the Gateway blocking all incoming connections which should mean it's closed, and I tried to block it on the Netgear also but it still appears as open when I do port scans.

    Screenshots: Screenshot by Lightshot
    Screenshot by Lightshot
    The next choice is blocking it in the firewall of each pc on your network.
      My System SpecsSystem Spec

  7. #7


    Posts : 59
    Windows 8.1 Pro


    Quote Originally Posted by broe23 View Post
    Quote Originally Posted by mattman View Post
    Yes, that port is used as a Remote assistance port by AT&T. So, they could potentially use it as a back door into your network.

    I would recommend closing it on the Gateway or blocking it on your Netgear. However, if you block it, some games such as Call of Duty won't work completely right.
    Never going to happen, due to this supposed "Back door" is nothing more then a blank rumor. There is no open port for the techs to access on the RG's.
    Not exactly right. I used to work as a Network Security Admin at a university and using open ports as "back doors" was one of the first things we all learned to do and prevent in school. Trust me, if there is a way into a network or machine, somebody will find it and use it.

    Either way, the OP is concerned about the open port and that is reason enough to close it in my opinion.
      My System SpecsSystem Spec

  8. #8


    Quote Originally Posted by broe23 View Post
    Quote Originally Posted by Jcwisgod View Post
    First going to tell how my network is configured, I use my AT&T Gateway for just my modem and firewall, and I use a Netgear router as an wireless access point. I ran a full port scan and found that port 3479 is open, is it an possible security risk, and if it is what can I do about it?
    This again. There is no backdoor on the 2-Wire/Pace gateway. I really wish this false rumor would just stop and go away.
    Explain why the port is open then if there's no backdoor
      My System SpecsSystem Spec

  9. #9


    Quote Originally Posted by mattman View Post
    Quote Originally Posted by Jcwisgod View Post
    Quote Originally Posted by mattman View Post
    Yes, that port is used as a Remote assistance port by AT&T. So, they could potentially use it as a back door into your network.

    I would recommend closing it on the Gateway or blocking it on your Netgear. However, if you block it, some games such as Call of Duty won't work completely right.
    I can't close it, I got the Gateway blocking all incoming connections which should mean it's closed, and I tried to block it on the Netgear also but it still appears as open when I do port scans.

    Screenshots: Screenshot by Lightshot
    Screenshot by Lightshot
    The next choice is blocking it in the firewall of each pc on your network.
    I got ​Windows
    firewall turned on, pretty sure it's blocking most of everything besides the few programs I've allowed through.
      My System SpecsSystem Spec

  10. #10


    Central IL
    Posts : 3,468
    Linux Mint 17.2


    Quote Originally Posted by Jcwisgod View Post
    Quote Originally Posted by broe23 View Post
    Quote Originally Posted by Jcwisgod View Post
    First going to tell how my network is configured, I use my AT&T Gateway for just my modem and firewall, and I use a Netgear router as an wireless access point. I ran a full port scan and found that port 3479 is open, is it an possible security risk, and if it is what can I do about it?
    This again. There is no backdoor on the 2-Wire/Pace gateway. I really wish this false rumor would just stop and go away.
    Explain why the port is open then if there's no backdoor
    The port is not there for the Gateway. It is for CimTrak. See CimTrak - Wikipedia, the free encyclopedia It is mainly for file integrity monitoring & compliance. Who ever started this whole Backdoor on Pace Gateways, should be found and flogged.

    Unless people understand what certain ports are for, and also how to read, along with interpret the information they are seeing, when running tests like GRC's Port scan. It is like going to your automotive mechanic's garage, hooking up their test equipment, not having a clue how to use it, and thinking that just because you see some error code, your vehicle is broke.
      My System SpecsSystem Spec

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Hidden backdoor in my AT&T Gateway
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