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NMAP scans

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There are some old posts out here regarding NMAP, but can someone explain why when I am using NMAP on an INTERNAL device scanning an EXTERNAL device on the Internet... why am I seeing ports/services like my Sophos POP mail proxy? 

I had to disconnect my UTM and connect directly with my scanning machine to get an accurate scan.

Thanks for any info.  I can try to post some scan results later as an example.


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    I have seen that too. I believe it is due to it going through the proxy.

    I get the following on a network not going through the proxy:

    nmap scanme.nmap.org

    22/tcp - open - ssh
    25/tcp -filtered - smtp
    80/tcp - open - http
    554/tcp - open - rtsp
    7070/tcp - open - realserver
    9929/tcp - open - nping-echo
    31337/tcp - open - elite

    What are you seeing using this same scan?

    C68
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  • 0
    I have seen that too. I believe it is due to it going through the proxy.

    I get the following on a network not going through the proxy:

    nmap scanme.nmap.org

    22/tcp - open - ssh
    25/tcp -filtered - smtp
    80/tcp - open - http
    554/tcp - open - rtsp
    7070/tcp - open - realserver
    9929/tcp - open - nping-echo
    31337/tcp - open - elite

    What are you seeing using this same scan?

    C68
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