[AusNOG] IPv6 - test ... Testing your dual stacked mail system is moving mail on v6 - helpful resources.
don at bowenvale.co.nz
Fri Mar 8 13:42:33 EST 2013
On 8/03/2013 3:37 p.m., Jeremy Visser wrote:
> On 08/03/13 13:27, Don Gould wrote:
>> sorry guys, just ignore, I'm just running a tcp dump as requested to see
>> if we can figure why my traffic isn't heading via v6.
> To save further noise, five minutes ago I set up
> blackhole at sunriseroad.net (dual-stack) and
> blackhole at ipv6.sunriseroad.net (IPv6-only) that you can use to test.
Can you make that do an out of office bounce back? That would be more
helpful to see what's coming back in the headers.
> My /etc/aliases contains:
> blackhole: "|/bin/true"
> Feel free to spam that address anyone setting up IPv6 mail. Just tested
> with work's Exchange 2010 server and it appears to work fine.
> Interestingly enough, despite our Exchange being dual-stack, it always
> prefers IPv4. Wonder if that is configurable.
Interesting, so what we're learning here is that these numbers we're
seeing about v6 traffic are a bit meaningless and no indication of demand.
Guys have dual stacked stuff but they're just not moving any traffic on
it. Sort of need to fix that for obvious reasons.
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