Question re session hijacking in dual stack environments w/MacOS

Mark Tinka mark.tinka at
Wed Oct 7 14:42:25 UTC 2015

On 2/Oct/15 07:46, Doug McIntyre wrote:

> I suspect this is OSX implementing IPv6 Privacy Extensions. Where OSX
> generates a new random IPv6 address, applies it to the interface, and then
> drops the old IPv6 addresses as they stale out. Sessions in use or not.
> sudo sysctl -w net.inet6.ip6.use_tempaddr=0
> sudo sh -c 'echo net.inet6.ip6.use_tempaddr=0 >> /etc/sysctl.conf'

Interesting. Thanks, Doug.

I just upgraded to El Capitan, so I'll see if there are any changes in
that when I'm back in the office, and then look at your suggestion if
not. Thanks.


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