Why can't minecraft port forward?

I've gone through many tutorials and what not. Everything was going fine until I got a message friend saying they couldn't connect.

I'll summarize this up:
login to router (linksys) > Applications & Gaming > Single Port Forwarding
Filled as app name: Minecraft
external internal port: 25565
Protocol: Both TCP and UDP
To IP Address: [my ipv4 address located in cmd ipconfig]
Enabled: checked
saved settings

Launched server
connected to server and invited friend
friend can't connect

Added (1). Tested by setting Application to FTP and enabled that.
Ran a test, but stills says port is closed!

Added (2). Turned off firewall
Port is still closed

Guest

What anti-virus are you using? You need to make sure that your firewall/antivirus aren't blocking those ports.

Ali

I turned off my Firewall and it still doesn't work after testing.

WillIN