Bukkit

My challenge is, measure you Bandwidth before and after using this pluggin, with the same amount of users and give me your feedback.

Can be invoked to return real Ip to your plug-ins if added as soft dependency using:

proxyTel = ((me.Tontito.ProxyTel.Main) getServer().getPluginManager().getPlugin("ProxyTel"));

if (proxyTel != null && proxyTel.isEnabled()) {
Address = proxyTel.GetIpFromSocket(player.getAddress().getAddress().getHostAddress() + ":" + player.getAddress().getPort());
}