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warning message from portsentry

What does this warning mean and what is causing it? 

> Dec 20 12:02:10 tc portsentry[540]: attackalert: Possible stealth scan
> from unknown host to TCP port: 111 (accept failed)

I get it when I run a 2.4 kernel but not when I run a 2.2 kernel so I
believe it's something internal to my system. There are hundreds of them
every hour.

We recognize the right of every man to perform services for
himself or to serve others according to conditions arrived at
through free bargaining. Communism denies this right, since it
places all services in the hands of an arbitrary, central
	-- Frédéric Bastiat (1801-1850)
    Rick Pasotto    rickp@telocity.com    http://www.niof.net

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