oam/little snitch/parts/whatsapp.lsrules

{
    "description": "",
    "name": "WhatsApp",
    "rules": [
        {
            "action": "allow",
            "notes": "Allow WhatsApp to authenticate to its servers.",
            "ports": "443",
            "process": "/Applications/WhatsApp.app/Contents/MacOS/WhatsApp",
            "protocol": "tcp",
            "remote-hosts": "web.whatsapp.com"
        },

        {
            "action": "allow",
            "notes": "Allow WhatsApp to securely download media.",
            "ports": "443",
            "process": "/Applications/WhatsApp.app/Contents/MacOS/WhatsApp",
            "protocol": "tcp",
            "remote-hosts": "cdn.whatsapp.net"
        },

        {
            "action": "allow",
            "notes": "Allow WhatsApp to securely connect to websites to get links' previews.",
            "ports": "443",
            "process": "/Applications/WhatsApp.app/Contents/MacOS/WhatsApp",
            "protocol": "tcp",
            "remote": "any"
        },
        {
            "action": "allow",
            "notes": "Allow WhatsApp to securely connect to websites to get links' previews.",
            "ports": "443",
            "process": "/Applications/WhatsApp.app/Contents/MacOS/WhatsApp",
            "protocol": "udp",
            "remote": "any"
        }
    ]
}