Wireguard VPN Client Server Setup

Config for setup of personal VPN based on Wireguard Protocol with Dual Stack Support (IPv4 and IPv6)

Refer Sample Server Config.conf for instructions on server.

Refer Sample Client Config.conf for instructions on client.

Refer CloudflareWarp-Wireguard.conf for creating Warp Wireguard Configuration.

Cloudflare Warp Endpoints:

Deafult [Anycast]: engage.cloudflareclient.com

May route to Europe due to peering issues between Cloudflare and Airtel/Jio

India: 162.159.195.8 or 162.159.193.4

May route to nearest default Server [Changes with each city]

Endpoint Ports: All UDP

Default: 2408

Alternatives: 500, 1701, 4500

Additional Commands

nano /etc/sysctl.conf			                            # Enable IPV4 and IPV6 forwarding
systemctl enable wg-quick@wg0	                        # Set wireguard to start on boot
ip a							                                    # Find Interface Name
wg genkey | tee privatekey | wg pubkey > publickey		# Generate Private and Public Keys
cd /etc/wireguard				                              # Default Wireguard Directory
nano wg0.conf					                                # Default WG Interface Name
wg-quick up wg0
wg-quick down wg0
wg show
wg set wg0 peer <Client Public Key>= allowed-ips <Client Unique IP Address(eg: 192.168.69.3/32, fd42:42:42::3/128)>
sample:
wg set wg0 peer cVU13uIpVWxCPE40uRB9ItoUQSq1rRuSuYncYWawViI= allowed-ips 192.168.69.3/32, fd42:42:42::3/128

To open all ports at startup (only for Oracle Cloud)

systemctl enable iptables-service.conf
nano iptables-startup.sh

#!/bin/sh

iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -F

ip6tables -P INPUT ACCEPT
ip6tables -P OUTPUT ACCEPT
ip6tables -P FORWARD ACCEPT
ip6tables -F

Make iptables-startup.sh executable and run on startup

chmod +x iptables-startup.sh
cd /etc/systemd/system
nano iptables-startup.service

[Unit]
Description=iptables startup

[Service]
ExecStart=/home/ubuntu/iptables-startup.sh

[Install]
WantedBy=multi-user.target

sudo systemctl start iptables-startup
sudo systemctl enable iptables-startup
sudo systemctl status iptables-startup

Alternate way to enable persistant iptables all acecept on Oracle Cloud [Only recommend if you have good firewall rules on the Oracle Cloud Console]

sudo su
iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -F

ip6tables -P INPUT ACCEPT
ip6tables -P OUTPUT ACCEPT
ip6tables -P FORWARD ACCEPT
ip6tables -F

There are versions of the saved iptables stored at /etc/iptables/rules.v4 and /etc/iptables/rules.v6 (Debian/Ubuntu).

For Saving to those files for persistance across reboots:

sudo sh -c '/sbin/iptables-save > /etc/iptables/rules.v4'