The stupidity of trying to "fix" DHCPv6

Joel Jaeggli joelja at
Fri Jun 10 21:42:23 UTC 2011

On Jun 10, 2011, at 11:18 AM, Valdis.Kletnieks at wrote:

> On Fri, 10 Jun 2011 12:54:17 CDT, Jima said:
>>  If we go down this path, how long before we hear screaming about rogue 
>> DHCPv6 servers giving v4-only networks a false v6 path?
> Already happened.  Good way to install an MITM against any v6-enabled boxes
> on a v4-only network, been multiple reported uses of that technique.

What's more v4 seem rather less likely to have any countermeasures or methods for detecting this... Back when I worked for a security vendor our endpoint security product specifically disabled ipv6 to address this exposure.

More information about the NANOG mailing list