V roce 2019 vysla vynikajici serie clanku [1] o WG na root.cz,
dobre mi fungoval setup [2] od CloudFlare WARP [3]
a po startu PC se mi V Debian 10 automaticky vytvoril tunnel
a vse fungovalo jak ma.
Ale po re-instalaci systemu na Debian 11, proste
po nabutovani se system automaticky nepripoji (nebo pripoji do nejakeho divneho stavu)
 a PC zustane ve stavu bez pripojeni ven 

Nepomuze ani odpojeni WG tunelu, je treba deaktivovat "autoconnect" pomoci
sudo nmcli connection modify warp autoconnect noa restartovat aby na PC znovu fungoalo pripojeni ....
Pro prehlednost prikladam pouzite prikazy:
#Import
sudo nmcli connection import type wireguard file warp.conf#Check connection
sudo nmcli connection#Display details (including private key)
sudo nmcli --show-secrets connection show warp#Check NetworkManager config is saved
sudo cat /etc/NetworkManager/system-connections/warp.nmconnection#Rename Connection name
sudo nmcli connection modify warp connection.id "WireGuard-doma"#Connect if not connected
sudo nmcli connect up warp#Disconnect
sudo nmcli connect down warp#Display all adapters
sudo nmcli#Disable autoconnect
sudo nmcli connection modify warp autoconnect no#Enable autoconnect
sudo nmcli connection modify warp autoconnect yes[1]
https://www.root.cz/serialy/wireguard-pro-jednoduchou-linuxovou-vpn/[2]
https://www.root.cz/clanky/wireguard-integrace-s-nastroji-network-manager-a-systemd/[3]
https://cf-warp.maple3142.net/warp.conf