Windows/Linux/Mac --> Open port 22448 in your firewall (Incoming and outgoing)
That should get you connecting to clients
I personally typically have 16-19 connections at any given time.
For those thumping there heads saying how do i open up port 22448.. Lets get some router ports open.
windows people hit windows key + R and type cmd and hit enter.
a dos box will open.
Type ipconfig and look for IPv4 Address & Default Gateway
Open a web browser and enter the Default gateway address (if your using a router this will put you at your routers login page. LOG IN, usual default router passwords are (drop Cap for second attempt. if you dont know your routers login & password check google for default or reset your router :p )
User: Admin
Password Admin
or
User: Admin
Password: password
Ok your in your router? Awesome, lets keep going.
Now that your on your routers web portal lets get looking for the PORT FORWARDING option, this is usually under FIREWALL or Advanced. You find it? Fucking awesome lets finish this.
Select Port Forwarding (if it is disabled Enable it)
Select ADD port or ADD Service (could be just ADD on your router no idea, but if it says add + etc choose it :p )
You will see a few options,
In Service type choose both (tcp + udp)
in Server IPv4 Address: enter the IPv4 Address you wrote down from ipconfig (we are telling the router to point to YOUR computer when the port is activated)
Starting port 22448
Ending port 22448
Hit save and WALLA your router is now passing 22448 traffic to your pc.