Domingo A. Siliceo --> netbsd-help (2006-04-22 17:32:27 +0000):
> i'm trying to write a ipf rule to disable the 'pong' answer to a
> 'ping' request from *outside* my network, with no success.

You probably want to block ICMP echo requests entering on your external
interface ($ext):

	block in quick on $ext proto icmp from any to any icmp-type echo


HTH, Jukka

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