OLD, BAD AND POTENTIALLY BUGGY
ping.ping for /ping
ping.safe for not getting kicked
ping.cp for /checkping
/ping: Shows your ping.
Set max.ping to a number.Code (Text):kickmessage: Your ping is too high!
pingcommandmessage: Your ping is %ping%.
nopermission: You don't have permission for this!
consolemessage: You can't send this from console!
And check.for.ping to second you want. I wrote 60. The plugin, checks all players pings. If it is bigger than max.ping, or equal to it the plugin kicks the player.
kick.message is the message shown on the kick page.
ping.command.message is the /ping's message. put %ping% to where you want to see the ping.
consolemessage: when someone types /ping from console it sends this message