On Ubuntu 12.04, with Docker version 0.6.3, build b0a49a3, this script will cause iptables failures to prevent launch of some docker containers

iptables-failure.js

#!/usr/bin/env node

var shell = require("shelljs")
var n = 100;
var nPorts = 10;

var port = 40000;

var launchCmds = [];
for (var i = 0; i < n; i++) {
    var	portString = "";
    var	innerPort = 3000;
    for (var j=0; j<nPorts; j++) {
        portString += " -p " + port + ":" + innerPort;
        innerPort++;
        port++;
    }
    launchCmds.push("docker -H 127.0.0.1:4243 run -d" + portString + " ubuntu:12.04 sleep 5")
}

var ids	= [];
var cb = function(code, output) {
    console.log(code, output);
};

for (var i = 0; i < n; i++) {
    shell.exec(launchCmds[i], {async: true}, cb)
}