nmap "Host x.x.x.x appears to be up" ... "(256 hosts up)"

From: Erik Myrold (emyrold_at_gmail.com)
Date: 11/14/04

  • Next message: Marc Ruef: "Attack Tool Kit (ATK) 3.0 released" 
    Date: 14 Nov 2004 03:09:37 -0000
To: pen-test@securityfocus.com
    ('binary' encoding is not supported, stored as-is)

    I am having an issue with a nmap host discovery scan (nmap -sP x.x.x.x/24) that is responding for 0 through broadcast 255 when there are only 30 hosts on that subnet.

    At this point I am not sure if it is the router or switch that is responding to the ping sweep.

    What does this usually mean? There is no NAT and no filtering that I can tell, but this is not my forte'...

    There are other subnets I can ping sweep with no problems...

    Thanks!

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