I have a warning that says " your listen port is blocked. You can still download but the speed may not be very fast.
Please check your firewall and NAT router configurations."
Please direct me to the right area and help me configure the right settings.
Thank you!
Just scroll upwards a little.
Hello, please provide enought information when you ask for a support. 
Click Here.
And about how to portforwarding, free to check our wiki
You can also read up on portforwarding here… You see?.. There are various places to learn from!