gistfile1.txt

iptables.list('Tunnels', function (rules) {
    var ports = {};

    rules.forEach(function (rule) {
        if (rule.parsed.target == 'REJECT') return;
        
        // extract tcp destination ports
        var match = rule.raw.match(/tcp dpt:(\d+)/);
        if (match) {
            ports[parseInt(match[1])] = 1;
        }
    })
});