Subj : Help?
To   : Nicholas Boel
From : Markus Reschke
Date : Wed Feb 25 2015 11:39:08

Hello Nicholas!

Feb 24 19:45 2015, Nicholas Boel wrote to All:

 NB> I have no idea how in the world I'm getting (or originally got) the 
 NB> other v6 address, nor have I or do I want it whatsoever. Is there a 
 NB> safe way to remove that address (the one ending in 6954) permanently?

Please run the following cmd to check if privacy extensions are enabled:

cat /proc/sys/net/ipv6/conf/eth0/use_tempaddr

(replace eth0 with the interface used)

        Preference for Privacy Extensions (RFC3041).
          <= 0 : disable Privacy Extensions
          == 1 : enable Privacy Extensions, but prefer public
                 addresses over temporary addresses.
          >  1 : enable Privacy Extensions and prefer temporary
                 addresses over public addresses.

 NB> If not, I assume I'll have to setup a static address (maybe with 
 NB> privacy extensions enabled in order to not have to use my MAC 
 NB> address) and disable any dynamic addresses? In this case, anyone have 
 NB> any good links with detailed instructions on how to do so, so I don't 
 NB> screw things up worse than they are?

When you enable PE you'll get two addresses for each prefix. The first one is the automatic one based on the MAC. And the second one is the random one. There are also some timers which can be adjusted to optimize the handling of the address changes. 

Regards,
Markus

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