Enabling IPv6 Privacy Extensions on all interfaces (Ubuntu Linux, may work for other distros too)

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Monday, January 23. 2012

Enabling IPv6 Privacy Extensions on all interfaces (Ubuntu Linux, may work for other distros too)

According to the Wikipedia IPv6 article, Privacy extensions are, except for the Windows platform and Mac OS X since 10.7 as well as iOS since version 4.3, not enabled by default.

In theory, one can enable the IPv6 Privacy Extensions on all interfaces at once using sysctl like this:

sudo sysctl net.ipv6.conf.all.use_tempaddr=2

However, this currently doesn't work as expected, so I'm using this one-liner in /etc/rc.local:

for IF in `/bin/ls /proc/sys/net/ipv6/conf/*/use_tempaddr` ; do echo 2 > $IF ; done

This also sets "use_tempaddr" for "default", which means it should also apply to interfaces added to the system afterwards.

A simple check to verify that the new configuration is working: ipv6-test.com will print your MAC address when available...

See also: Linux Kernel Bug 11655

Posted by crox at 00:22 | Comments (0) | Trackback (1)

Defined tags for this entry: ipv6, kernel, linux, network, ubuntu

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IPv6 test websites
http://ipv6-test.com/ (also has a speed test, shows your MAC address when available) http://test-ipv6.com/ (provides detailed technical info and "readiness score") http://whatismyv6.com/ (IPv4 only, IPv6 only) http://www.whatismyipv6.net/ (provides t

Weblog: blog.crox.net
Tracked: Jan 23, 00:57

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