Messages in this thread | | | Date | Wed, 23 Jul 2014 12:33:14 +0100 | From | Stephane Chazelas <> | Subject | network interfaces called "all", "default" or "config" |
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Hiya,
you may want to forbid the creation of interfaces whose name is one of the special files in /proc/net and /proc/sys.
I can see some characters (like space, tab, newline, slash, dot...) are alread forbidden in interface names (EINVAL), but one can do for instance:
sudo ip link add link eth0 all type vlan id 2 sudo ip link add link eth0 default type vlan id 3 sudo ip link add link eth0 config type vlan id 4
Interestingly, after you add a "all" or "default", the corresponding /proc/sys/net/ipv[46]/conf/(all|default) become empty, and remain so even after you've removed the interface.
Adding an interface called "config" masks /proc/net/vlan/config
(tested with 3.14-1-amd64 on debian)
-- Stephane
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