Wireguard configs generator

• Generates WireGuard server and client configurations automatically.
• Uses wireguard-tools to generate private keys, public keys, and preshared keys.
• Creates a server configuration with NAT and forwarding rules using iptables.
• Creates multiple client configurations based on the specified number of clients.
• Allows specifying a custom network CIDR (e.g., 10.0.0.0/24).
• Supports configuring full tunnel (0.0.0.0/0, ::/0) or split tunnel (VPN subnet only) for clients.
• Optionally includes a DNS server in client configurations.
• Allows setting a custom network interface for NAT rules.
• Saves all configuration files inside the ./configs/ directory.
• Accepts the following command-line arguments: --num_clients: Number of client configs to generate. --dns_server: (Optional) DNS server to use. --network_interface: Network interface for iptables rules. --server_address: Public address of the WireGuard server. --port: WireGuard listening port. --network_cidr: CIDR of the WireGuard network (e.g., 10.0.0.0/24). --tunnel: Enables full tunnel mode (0.0.0.0/0, ::/0) or split tunnel (VPN subnet only) for clients. Options are "split" / "full".

Example usage:

python generate_wg_configs.py \
    --num_clients 5 \
    --dns_server 10.0.0.2 \
    --network_interface enp34s0 \
    --server_address example.com \
    --port 51900 \
    --network_cidr 10.0.0.0/24 \
    --tunnel split