Two of my friends tried, and I tried from a different location, but nobody can connect to my server.
I've port forwarded port 25565 on TCP to my local IP (192.168.1.4) and I've let 25565 through my PC Firewall, but it doesn't let me connect.
My internet IP is 98.71.43.145.
Here's my server.properties:
#Minecraft server properties
#Fri Jun 14 10:42:52 CDT 2013
generator-settings=
allow-nether=true
level-name=Tekkit
enable-query=false
allow-flight=true
server-port=25565
level-type=DEFAULT
enable-rcon=false
level-seed=
server-ip=
max-build-height=256
spawn-npcs=true
white-list=false
spawn-animals=true
snooper-enabled=true
hardcore=false
texture-pack=
online-mode=true
pvp=true
difficulty=1
gamemode=0
max-players=20
spawn-monsters=true
generate-structures=true
view-distance=10
motd=Tekkit!!
Please help, if there's anything that's there to be fixed.