Separate names with a comma.
It's been a while hmmm
The only thing I've seen close enough to a fly plugin was the magic carpet plugin but that needs updating.
Both is recommend if you want queries coming in for server status.
PocketMine config tool? You sure... never heard of it...
Oh and yes you could use a dedicated vpn as a temporally solution if you're running pm at home.
Duktok already explained it, DDoS attacks the actual box's network. This can be prevented by a firewall though you'd have to go pretty advanced into...
Not possible, blame PHP.