Blocking scanning from outside

From: James Wilson (netsurfat_private)
Date: Tue Jan 18 2000 - 07:15:54 PST

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    We have a FW-1 box set up at the perimeter with a rule that blocks any
    any from outside, but when I run a scan using WinSockPingProPack it
    appears to see individual addresses behind the firewall.  It does not
    see any information on them such as ports open etc. but it does list
    the IP as there.  Is there a special rule needed to make those
    invisible, or is private addressing the only way to block this (since
    they don't route from outside)?
    
    - -
    James D. Wilson, CCDA, MCP
    "non sunt multiplicanda entia praeter necessitatem"
    William of Ockham (1285-1347/49)
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