Cannot add wg0 on CentOS 8

[Phil Perry]

On 09/12/2021 10:47, Mehdi Haghgoo wrote:
> Hi,
> 
> I'm trying to add  a wireguard device on CentOS Stream (was Linux just converted to Stream).
> When I enter "ip link add wg0 type wireguard" or try it using wg-quick wg0 up, I get the following error:
> 
> RTNETLINK answers: Operation not supported
> 
> I have wireguard-tools and kmod-wireguard installed.
> Additional information:
> 
> uname -r: 4.18.0-147.8.1.el8_1.x86_64
> 
> wg --version: wireguard-tools v1.0.20210914 - https://git.zx2c4.com/wireguard-tools/
> 
> kmod-wireguard version: 1.0.20211208
> 
> 
> Best regards,
> Mehdi

Is the wireguard module loaded? I doubt it.

You are running a *very* old kernel, and I suspect the version of 
kmod-wireguard you are running does not support that kernel. Why are you 
running a kernel that is two years out of date and full of unpatched 
security holes? Updating your system is probably the first step to 
fixing your issue.