alpine-server-setup/services/wireguard/vpn_traffic.policy.json

{
    "description": "Allow VPN traffic through Wireguard interface",
    "filter": [
        {
            "in": "VPN",
            "service": [ "ssh", "dns", "ping", "http", "https" ],
            "action": "accept",
            "src": "10.0.0.1/24"
        }
    ]
}