As the title said its Packet filter so i won't talk to much about it SO WHY JGUARD ? cuz it will satiate your need to control the whole server also you can request new features for your needs.
Can`t find a trused one to manage server events ? Advanced events in your mind that no one can handle it ? Do you want to scheduler your events ? JBot can make it all try it now !
Your VPS under attack ? JFlood is here to protect you ! By limitting connections per second , you are protected against ddos attack.
Automatically backup your database even if you're away from vps.