[ipv6hackers] IPv6 source address selection on Linux

Karl Auer kauer at biplane.com.au
Thu Jul 19 16:27:51 CEST 2012

On Thu, 2012-07-19 at 15:36 +0200, Romain Boissat wrote:
> > Could someone provide me with clue on how i can force traffic on my
> > server going to 2001:db8::1 to *always* source from the configured
> > address fded:e128:5900::1 ?
> You can this little hack to all other IPv6 addresses:
> ip addr change $IP6_ADDR/$NETMASK dev $NIC preferred_lft 0

Be aware that this hack will make the address of the remaining NIC the
source address for ALL packets leaving the server. OK if that's what you
want. And if the server addresses are coming via autoconfig, double
check that the fix doesn't disappear with each RA that comes down the
pike :-)

Regards, K.

Karl Auer (kauer at biplane.com.au)

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