src/connectivity/network/netcfg/config/default.json

{
    "dns_config": {
        "servers": [
            "8.8.8.8",
            "8.8.4.4",
            "2001:4860:4860::8888",
            "2001:4860:4860::8844"
        ]
    },
    "filter_config": {
        "nat_rules": [],
        "rdr_rules": [],
        "rules": [
            "pass in proto tcp to port 22;",
            "pass in proto tcp to port 80;",
            "pass in proto tcp to range 1024:65535;",
            "drop in proto tcp to range 1:65535;"
        ]
    },
    "filter_enabled_interface_types": [
        "wlan"
    ],
    "interface_metrics": {
        "wlan_metric": 90,
        "eth_metric": 100
    },
    "allowed_upstream_device_classes": [
        "ethernet",
        "wlan"
    ],
    "enable_dhcpv6": true
}