I created a teleporter, I wish it can be used on one side.

Red ---> Blue teleporter but not the other way.

I tried:
/port create teleport TeleportRed
"The port was created successfully"
/port arrive TeleportRed (on my current location and with an other region)
"Arrival location updated"
When I go in my TeleportRed
"This port has no destination!"

Help me :(

I think you misunderstand what this command is supposed to be used for. You're supposed to link the ports together using /port link port1 port2, and use /port arrive to set arrival locations for each one.

So for example, if port1 is a ship I would stand on the docks next to it and type /port arrive port1. Then whenever anyone steps into port2, they will arrive on the docks next to port1.

Hope this helps.

Ok sorry, I'm Belgian, I don't speak English very well ^^

Can I do what I want? ("Red ---> Blue teleporter but not the other way.")

Because when I do:
/port create Red
/port create Blue
/port destination Red Blue
It's work but when I go on the Blue, it say "This port has no destination!", it's not "beautiful"

If you don't want the blue port to be accessible you could hide its activation region underground or something, but this plugin wasn't really designed to be used like that.

Ok thank you for your rapid answer :)

This idee can be a enhancement :D