Enterprise Dual Stack without IPv6 Transit

[staticsafe]

On 12/10/2014 16:14, Gert Doering wrote:
> Hi,
> 
> On Wed, Dec 10, 2014 at 12:59:40AM +0100, Jeroen Massar wrote:
>> The 'whatever is faster' is actually pretty deterministic.
>>
>> OSX does it with a magic combo that apparently consists out of latency
>> and throughput... and unless somebody figured it out the exact
>> parameters are unknown.
> 
> Yes, and if you have a well-designed network that has IPv4 follow the
> same packet path as IPv6, OSX will happily flip-flop back and forth 
> between IPv4 and IPv6 between http request to the same server.
> 
> Not overly deterministic, and not helpful when looking for "sometimes
> it does not work" errors (like, an Apache ACL mistakenly permitting only
> one of the protocols).
> 
> Gert Doering
>         -- NetMaster
> 

Also problematic with dual-stack websites that rely on IP in their "user
is authenticated" cookie. Example - Linode manager.

-- 
staticsafe
https://staticsafe.ca