This is probably completely and utterly useless. But, here goes. I typically find that most griefers I see (usually part of a griefing "team") usually use open proxies. I do a quick scan of suspected griefers, and they turn up positive. Open proxies are bad! They can allow for ban evasion if you only IP ban them (but you should account ban as well.) Anyways, checking the standard ports of the clients IP= SOCKS4 SOCKS5 HTTP PROXY TELNET-PROXY to figure out if it really is open. Why do griefers use open proxies? Most proxies are expensive. A proxy works like this. Let's say Bob lives in a country where certain content is restricted. Usually, the connection goes like this (there are a lot more, but this is for simplicity) +-----+ +-----------+ | Bob | ----> | Website | +-----+ +-----------+ Let's say Bob's IP is 18.104.22.168 The IP that the website sees is 22.214.171.124 With a proxy, it goes something a little like this: +-----+ +------------+ +-----------+ | Bob | ----> | Proxy | -----> | Website | +-----+ + ----------+ +-----------+ Let's say the proxy IP is 126.96.36.199 Instead of Bob's IP showing up, the proxy's IP shows up. So the website really "sees" 188.8.131.52 Griefers can fool the Minecraft server if they were IP banned by using a proxy, so it doesnt match the IP to that specific IP ban. This is a ridiculous request, but it could stop some griefers. Not all, some are still connecting from home connections and/or closed proxies. I thank you for reading this thread, and yes, I know it's probably a terrible idea.