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GRC ShieldsUp Port Appearing As Closed Instead of Stealth

  1. #1

    GRC ShieldsUp Port Appearing As Closed Instead of Stealth


    I just GRC ShieldsUp Test and all ports besides one is appearing stealthed, how can I fix this so all can appear as stealthed. The port that appears as Closed instead of Stealth is port 25.

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  2. #2


    Posts : 1,360
    Windows 8.1 Enterprise


    Are you using a router? If you are, access the web configuration and disable UPnP.
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  3. #3


    Quote Originally Posted by ectech View Post
    Are you using a router? If you are, access the web configuration and disable UPnP.
    I'm using a modem and a router, as far as I can tell UPnP is disable.
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  4. #4


    Posts : 1,883
    7601.18247.x86fre.win7sp1


    Probably your modem reporting that. Likely nothing you can do about it, since its likely set by the isp and you can not access advanced settings or whatnot. Just a guess though.

    Try accessing your modem's ip address in a web browser. See what you can dig up.

    If you don't know it, try 192.168.100.1

    or command prompt: tracert eightforums.com

    and watch the hops. Should be 2nd one shown, unless it is shown as *
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  5. #5


    Posts : 1,360
    Windows 8.1 Enterprise


    As long as the port is closed you have nothing to be concerned about. A closed port is as good as a stealth port.
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  6. #6


    Posts : 1,883
    7601.18247.x86fre.win7sp1


    ehhh not necessarily. It's not a vulnerability in and of itself, but a scan of a block of ips with his in it, or a full scan of only his ip will let the scanner know the ip has equipment operating on it. It would throw a flag, so-to-speak. All in all, still nothing terrible, but not optimal.
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  7. #7


    Posts : 1,360
    Windows 8.1 Enterprise


    Quote Originally Posted by MasterChief View Post
    ehhh not necessarily. It's not a vulnerability in and of itself, but a scan of a block of ips with his in it, or a full scan of only his ip will let the scanner know the ip has equipment operating on it. It would throw a flag, so-to-speak. All in all, still nothing terrible, but not optimal.
    If a port does not have any exploitable services running on it, it doesn't matter. If you were to do a port scan of any ip address which reports known ports closed you can not run an exploit against it. So, closed is as good as stealth.
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  8. #8


    I'm thinking it could be my ISP(ATT), the modem is a 2wire modem/router combo but I got a Netgear Router connected to it.
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  9. #9


    Posts : 1,360
    Windows 8.1 Enterprise


    Quote Originally Posted by Jcwisgod View Post
    I'm thinking it could be my ISP(ATT), the modem is a 2wire modem/router combo but I got a Netgear Router connected to it.
    That could be, either way its nothing to be alarmed about.
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  10. #10


    Covington, La
    Posts : 1,184
    Windows 7 HP 64bit, Windows 8.1 Pro w/Media Center 64BIT


    If you search the GRC site it will explain it. It is normal for port 25 to do that on some systems as that is a default port for e-mail. I think it was mentioned on CRC forum.

    Jim
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GRC ShieldsUp Port Appearing As Closed Instead of Stealth
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