[IPv6crawler-wg] Fwd: Re: [ipv6hackers] IPv6 scanning (was Re: Help wanted: Nmap IPv6 OSDetection)

Olivier MJ Crepin-Leblond ocl at gih.com
Wed Sep 28 22:59:21 BST 2011


I've already sent you some IPv6 fun addresses in the past.
Below is another list.

However, I am told that the combination DEAD:BEEF triggers a "feature"
in the latest IOS of CISCO routers - apparently something to do with
tracking bad memory:
"

With dead:beef:: I had a problem once with cisco router using addresses with
dead:beef:: and having enabled an option to check the memory for any
corruption.

And the router was crashing or sending some bad Tracebacks messages all the
time.

 I raised a bug and after investigation, the DE told me that it was normal
because I was using an address with dead:beef which is a marker for
corrupted memory ! So without the service which check that there is no
memory corruption on a regular basis it is no problem. But if you enable
this checking, the the router find a problem everytime it reads the address
with dead:beef:: !!! Not a bug... It was not fixed :-)))
And I changed my address for dead:bee to solve the problem during my testing"

That's all IPv6 trivia for today.

Cheers,

O.

-------- Message original --------
Sujet: 	Re: [ipv6hackers] IPv6 scanning (was Re: Help wanted: Nmap IPv6
OSDetection)
Date : 	Wed, 28 Sep 2011 17:00:55 +0200
De : 	Yann GAUTERON <yann at gauteron.me>
Répondre à : 	IPv6 Hackers Mailing List <ipv6hackers at lists.si6networks.com>
Pour : 	IPv6 Hackers Mailing List <ipv6hackers at lists.si6networks.com>



I think others are
::15 (is)
::ACE
::DAD
::11FE (life)
::BABE
::BE57 (best)
::BEEF
::CAFE
::DEAD
::F001 (fool)
::F00D
::FEE1 (feel)
::FEED

and any other combination of 1-4 letters word with letters A-F, O (0), I or
L (1), E (3), S (5), T (7).

Words can also be combined:
::DAD:15:ACE


Others also use the IPv4 address for the last 64 bits:
2001:db8::192:168:0:10 for an host having IPv4 address 192.168.0.10 in the
2001:db8::/64 network.
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