ICMP blocking

[Gary Dobbins <dobbins () ND EDU>]

Quick survey:  Who's blocking ICMP subsets (like echo requests,
traceroutes) at their borders?  Who's not?  Strong feelings about why in
either case?

Certainly, doing so is not a huge security gain, but the alternative
means you're giving away the map anonymously.
How polar is the community on this?

Thanks.
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  Gary Dobbins, CISSP -- Director, Information Security
  University of Notre Dame, Office of Information Technologies