anonymizeIp.painless

String anonymizeIp(def ip) {
    if (ip.contains(':')) {
        try {
            StringTokenizer tok = new StringTokenizer(ip, ':');
            String firstGroup = tok.nextToken();
            String secondGroup = tok.nextToken();
            String thirdGroup = tok.nextToken();
            return firstGroup + ":" + secondGroup + ":" + thirdGroup + ":0:0:0:0:0";
        } catch (Exception e) {
            return "0:0:0:0:0:0:0:0";
        }
    } else {
        try {
            StringTokenizer tok = new StringTokenizer(ip, '.');
            String firstGroup = tok.nextToken();
            String secondGroup = tok.nextToken();
            return firstGroup + "." + secondGroup + "." + "0.0";
        } catch (Exception e) {
            return "0.0.0.0";
        }
    }
}

ctx.remote_addr = anonymizeIp(ctx.remote_addr)