Arch Linux

jaco

Member

From: Toulouse, France

Registered: 2011-03-17

Posts: 149

[Sysctl] Key not recognized at boot

Hi,

I have a IPv6 connection and i want to use a dynamic "random" IPv6 address for my outgoing connections. So, i've tested the following command:

% sudo sysctl -w net.ipv6.conf.eth0.use_tempaddr=2  
net.ipv6.conf.eth0.use_tempaddr = 2
% sysctl net.ipv6.conf.eth0.use_tempaddr  
net.ipv6.conf.eth0.use_tempaddr = 2

It works fine: my eth0 interface has now 2 non local IPv6 addresses. A dynamic one and a "static" one, computed from the MAC address :

% ip a s eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether f0:de:f1:a8:4a:4e brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.49/24 brd 192.168.2.255 scope global eth0
    inet6 .................../64 scope global temporary dynamic 
       valid_lft 86263sec preferred_lft 85663sec
    inet6 ................../64 scope global dynamic 
       valid_lft 86263sec preferred_lft 86263sec
    inet6 fe80::f2de:f1ff:fea8:4a4e/64 scope link 
       valid_lft forever preferred_lft forever

To configure once for all this setting, i've added the following line in my /etc/sysctl.conf file :

net.ipv6.conf.eth0.use_tempaddr = 2

But, on boot, i can see a message saying this key is not recognized and a sysctl command shows the value is still the default one (0)...

Any clue?