non-standard ping messages

["Jefferson, Shawn" <Shawn.Jefferson () bcferries com>]

With the recent revelations of the Target breach, I was wondering if there is an existing rule that watches for 
non-standard ping messages crossing the network?  That was one of the indicators in this incident and that seems like 
something useful to look for anyway, so maybe there is already a rule either in VRT or ET the ruleset.  Does anyone 
know of an existing rule?

Thanks!
Shawn

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