Request Security Advice

[Parth]

I've tried to secure the server ever since we got an obnoxious person with a loud music feed trying to disrupt the server.

Users were registering and were able to freely move about, at least I though they were. A couple of weeks ago, I added passwords to the individual channels.

Now it seems that there are users who have issues joining the server as registered. Every time they join they come in with the "U" unregistered flag next to their nickname. This also seems to mean that they cannot change channels from the lobby to one of the registered gaming channels I have setiup on the server.

It's frustrating for the people trying to use my server and for myself trying to sort out where I have gone wrong.

Please help me straighten this out if at all possible.