what is this parameter TCP+3?

[alfavpn 1]

I'm a newbie

In Amule, what is this parameter in attached image?

 

Maybe, do I have to enter this parameter on the "Your forwarded ports" page?

what.tiff

[OpenSourcerer 1435]

 

• 4662 TCP (outgoing and incoming): Client to client transfers.
• 4665 UDP (outgoing and incoming): Used for global eDonkey server searches and global source queries. This is always Client TCP port + 3.
• 4672 UDP (outgoing and incoming): Extended aMule protocol, Queue Rating, File Reask Ping

 

aMule seems to need 4662, 4665 and 4672, both TCP and UDP among others. These ports are already taken, but you can always use others.