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networking/wireguard.md

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+# WireGuard
+
+WireGuard is an extremely simple yet fast and modern [VPN Protocol](networking/vpn.md) that utilizes state-of-the-art. It aims to be faster, simpler, leaner, and more useful than IPsec, while avoiding the massive headache. It intends to be considerably more performant than OpenVPN. WireGuard is designed as a general purpose VPN for running on embedded interfaces and super computers alike, fit for many different circumstances.
+
+---
+#### Create Wireguard keys (private & publickey)
+
+```
+wg genkey | tee privatekey | wg pubkey > publickey
+```
+
+#### Example of server config
+
+for example:
+```
+nano /etc/wireguard/wg0.conf
+```
+
+Example server config:
+```
+[Interface]
+Address = 192.168.8.1/0 #ip of the wireguard server
+SaveConfig = true
+ListenPort = 51820 # default port you can change it
+FwMark = 0xca6c
+PrivateKey = #paste here your privatekey
+
+PostUp = iptables -A FORWARD -i wg0 -j ACCEPT
+PostUp = iptables -t nat -A POSTROUTING -o ens2 -j MASQUERADE
+PostDown = iptables -A FORWARD -i wg0 -j ACCEPT
+PostDown= iptables -t nat -A POSTROUTING -o ens2 -j MASQUERADE
+
+# change here your peers conf
+[Peer]
+PublicKey = #paste here your pub key of your client
+AllowedIPs = 192.168.8.3/32 # change ip in your range
+PersistentKeepalive = 25
+
+[Peer]
+PublicKey = #paste here your pub key of your client
+AllowedIPs = 192.168.8.2/32 # change ip in your range
+PersistentKeepalive = 25
+```
+
+#### Example of the client config
+
+```
+[Interface]
+Address = 192.168.8.2/32 # change this to the ip that you want for your client
+MTU = 1420
+SaveConfig = true
+ListenPort = 47991
+FwMark = 0xca6c
+PrivateKey = # set here the privatekey of your client.
+
+[Peer]
+PublicKey = # paste here the public key of your wireguard server
+AllowedIPs = 0.0.0.0/0
+Endpoint = your-external-ip:51820
+PersistentKeepalive = 15
+
+```
+
+## Troubleshooting
+
+With this command you can enable the debug logging in WireGuard:
+
+```bash
+echo 'module wireguard +p' | sudo tee /sys/kernel/debug/dynamic_debug/control
+```
+
+And the same command with -p can disable it again:
+
+```bash
+echo 'module wireguard -p' | sudo tee /sys/kernel/debug/dynamic_debug/control
+```