IPv4 source routing options and IPv6 Type 0 Routing Header

Joe Abley jabley at ca.afilias.info
Wed Jun 25 12:06:25 UTC 2008

On 25 Jun 2008, at 03:55, Fernando Gont wrote:

> Quite a few times it has been mentioned to me that some peering  
> agreements require support for the IPv4 source routing options. I  
> was wondering whether this is still the case for some ISPs, or it is  
> not the case anymore.
> I was also wondering if it has ever been the case that IPv6 peering  
> agreements have required support for Type 0 Routing Header and, if  
> it has, whether that still happens nowadays. (I guess not, but....)

I have never seen such a requirement for IPv6.

Note also that type-0 routing headers were deprecated in RFC 5095,  
last year.

> The functionality provided by IPv6's Type 0 Routing Header can be  
> exploited in order to achieve traffic amplification over a remote  
> path for the purposes of generating denial-of-service traffic. This  
> document updates the IPv6 specification to deprecate the use of IPv6  
> Type 0 Routing Headers, in light of this security concern.


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