[Firehol-support] pings aren't being dropped for some reason?

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I can't figure out why pings are not being blocked.  I thought
this worked in the past.  Here's my firehol.conf:

    interface any world
        protection strong
        client all accept

But I can still ping my machine from a remote machine.  I've
also tried adding:

        policy drop

Both before and after protection strong.  And updating firehol
from 1.250-r2 (Gentoo) to the latest 1.273.  No dice :(