Comment 9 for bug 1068756

From 'include/linux/in6.h'

/* RFC5014: Source address selection */
#define IPV6_ADDR_PREFERENCES 72

#define IPV6_PREFER_SRC_TMP 0x0001
#define IPV6_PREFER_SRC_PUBLIC 0x0002
#define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100
#define IPV6_PREFER_SRC_COA 0x0004
#define IPV6_PREFER_SRC_HOME 0x0400
#define IPV6_PREFER_SRC_CGA 0x0008
#define IPV6_PREFER_SRC_NONCGA 0x0800

so you need to call
setsockopt(socket, IPPROTO_IPV6, IPV6_ADDR_PREFERENCES, &value, sizeof(value)).

Where value=IPV6_PREFER_SRC_PUBLIC

On 16 May 2013 23:24, Jason Eggleston <email address hidden> wrote:
>
> I can confirm all of the security addresses by default are marked
> Global. There is no application level workaround for this.
>
> $ ifconfig eth0 | awk '/inet6/ {print $1,$2,"ipv6addr",$4}'
> inet6 addr: ipv6addr Scope:Global
> inet6 addr: ipv6addr Scope:Global
> inet6 addr: ipv6addr Scope:Global
> inet6 addr: ipv6addr Scope:Link
> inet6 addr: ipv6addr Scope:Global
> inet6 addr: ipv6addr Scope:Global
> inet6 addr: ipv6addr Scope:Global
> inet6 addr: ipv6addr Scope:Global
> inet6 addr: ipv6addr Scope:Global
>
> --
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> report.
> https://bugs.launchpad.net/bugs/1068756
>
> Title:
> IPv6 Privacy Extensions enabled on Ubuntu Server by default
>
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--
Neil Wilson