If the following command does not list any module after you installed wireguard-dkms,:
modprobe wireguard && lsmod | grep wireguard
or if creating a new link returns:
# ip link add dev wg0 type wireguard RTNETLINK answers: Operation not supported
you probably miss the linux headers.
These headers are available in linux-headers or linux-lts-headers
depending of the kernel installed on your system.
After installing the appropriate linux kernel headers,:
apt -y install linux-headers-$(uname -r)
just do:
dpkg-reconfigure wireguard-dkms
To dump the WireGuard configuration, use:
wg showconf wg0-server
Running:
tcpdump -i wg0-server
in combination with an ICMP ping:
vagrant@tf-alice:~# ping 10.10.10.52
on both machines might tell you whether your packets are reaching the remote peer or if they're not getting through the tunnel.
Display information about bridge device:
brctl show tb-quickstart bridge monitor
Display Spanning Tree Protocol (STP) information:
brctl showstp tb-quickstart
Display MAC and ARP information:
brctl showmacs tb-quickstart arp -a
Ping MAC address through ARP:
arping -i tb-quickstart 96:71:7d:db:cd:36
To see the dynamic MAC address assignment in action while bouncing the link on the remote machine, run:
watch -n0.5 'arp -a; echo; brctl showmacs tb-quickstart'