How to deal with cheaters and restrict to Titanium?

[Jooma]

Hello, I have a new server up and am wondering two things that I haven't been able to find out on my own.

1) Cheaters. Twice now I've had people join my server and make themselves max level. I don't know how they did it, but I've deleted their characters and banned the account. I'd like to know how to prevent this or what I overlooked.

2) Restricting client version. Is there any way to restrict what version of the game people can join with? I'd like to restrict to Titanium only if possible.


Thanks so much for any help anyone can offer.