Proxmox VE 8.2 host + AmneziaWG

amneziawg-client-proxmox-host.sh

# The problem: by default not available kernel sources for compile AmneziaWG kernel module. 
# So the amnezia instalation is broken by default because of DKMS module can not be built/configured.
# Usually this is not needed on the host, but my use case is WG installation as client

# Prepare for installation as written here (https://github.com/amnezia-vpn/amneziawg-linux-kernel-module):
apt-get install pve-headers
apt install -y software-properties-common python3-launchpadlib gnupg2 linux-headers-$(uname -r)
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 57290828
echo "deb https://ppa.launchpadcontent.net/amnezia/ppa/ubuntu focal main" | sudo tee -a /etc/apt/sources.list
echo "deb-src https://ppa.launchpadcontent.net/amnezia/ppa/ubuntu focal main" | sudo tee -a /etc/apt/sources.list
apt-get update
apt-get install -y amneziawg

# After steps above, AmneziaWG will be installed but you will se the error messages about build errors for amneziawg-dkms package.
# So we need to download Proxmox VE kernel manually and use it for reconfigure
cd /root
git clone https://git.proxmox.com/git/pve-kernel.git
cd pve-kernel
git submodule udpate --init
git checkout bookworm-6.8 # this is kernel of the Proxmox VE 8.2
git submodule udpate

# Let's start reconfigure DKMS module
cd /usr/src/amneziawg-1.0.0
ln -s /root/pve-kernel/submodules/ubuntu-kernel kernel
dpkg --configure amneziawg-dkms

# Now must be no errors above.
# Add your config to the /etc/amnezia/amneziawg/wg0.conf
# NOTE. I added there my client config with AllowedIPs = 10.8.1.0/24 to access host but without additional routing
# For e.g. my full client config:
#  [Interface]
#  Address = 10.8.1.50/32
#  #DNS = 1.1.1.1, 1.0.0.1
#  PrivateKey = ...
#  Jc = 3
#  Jmin = 15
#  Jmax = 45
#  S1 = 10
#  S2 = 60
#  H1 = 235654565
#  H2 = 865468475
#  H3 = 3956328564
#  H4 = 3645420394
#  [Peer]
#  PublicKey = ...
#  PresharedKey = ...
#  AllowedIPs = 10.8.1.0/24   
#  Endpoint = <server host>:<server port>
#  PersistentKeepalive = 30

# And in the end start and activate AmneziaWG to be persistent
awg-quick up wg0 # NOTE: if Proxmox host not accessible after this - try to restart your VPN server, it will force re-connect all clients
systemctl enable awg-quick@wg0