PTR records for IPv6

Mikael Abrahamsson swmike at
Wed Sep 4 13:37:40 CEST 2013

On Tue, 3 Sep 2013, Mohacsi Janos wrote:

>> Mostly because it's on by default. Even if you configure a static address 
>> and default gw, as soon as the system sees RAs it might start to use SLAAC 
>> based privacy addresses for outgoing connections. I've already seen this 
>> happen once, which caused problems sending mail to google.
> I think it is Configuration problem on SMTP server.

I'd imagine this is the default behaviour if nothing is changed. Outgoing 
TCP connections will use the temporary addresses by default, and privacy 
addressing is turned on by default as well.

Mikael Abrahamsson    email: swmike at

More information about the ipv6-ops mailing list