Active ipv6 'mapping' project ?

[Brandon Applegate]

Just poking around in my home firewall logs.  I have a tunnel to one of my 
data centers giving the house ipv6.  I noticed a steady flow of icmp echo 
requests with the destination address being my firewall itself.  This 
pattern is steady (not a flood, but it is constant).  They are all 64 byte 
packets with the payload being the typical walk through ASCII.

A sample of the source addresses are here:

http://pastebin.com/X9FwBtkE

That's from ~ 1000 packets sample.  A good amount of these come back as 
Akamai.

Anyone know what this is ?  Thanks.

--
Brandon Applegate - CCIE 10273
PGP Key fingerprint:
7407 DC86 AA7B A57F 62D1 A715 3C63 66A1 181E 6996
"SH1-0151.  This is the serial number, of our orbital gun."