RTNETLINK answers: Operation not supported

[Jörg Thalheim]

On 2017-02-28 17:08, William Clark wrote:
> Hello,
>
> So I wanted to try WireGuard but unfortunately I can't get pas this part:
> ip link add dev wg0 type wireguard.
>
> When ever I run the command "ip link add dev wg0 type wireguard"
> I get the output:
> RTNETLINK answers: Operation not supported
>
> This both happens on CentOS 7 and Fedora 25 and Ubuntu 16.04.
>
> CentOS 7 Kernel:
> Linux hostname 3.10.0-514.6.2.el7.x86_64 #1 SMP Thu Feb 23 03:04:39 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
> Fedora 25 Kernel:
> Linux hostname 4.9.7-x86_64-X #2 SMP Thu Feb 2 15:43:55 EST 2017 x86_64 x86_64 x86_64 GNU/Linux
>
> I've tried installing Linux headers too, but no luck and I've rebooted after the upgrade too, and still no luck.
>
> Thanks a lot.

If the following commands do not succeed, the wireguard kernel module was not installed correctly:

$ modprobe wireguard
$ lsmod | grep wireguard
wireguard             126976  0
x_tables               28672  2 xt_hashlimit,wireguard
ip6_udp_tunnel         16384  1 wireguard
udp_tunnel             16384  1 wireguard
ipv6                  401408  162 nf_conntrack_ipv6,nf_defrag_ipv6,wireguard,bridge