Implement a Tomcat website on external box

I have a tomcat application server installed on a windows 2008 server - myserver1
So I can open this link http://myserver1:8080, on the browser.

now, myserver1 is exposed to Internet .
So users can do this - http://www.myserverl.com and it works fine.
Now how can i access the tomcat application server from outside? Like what should i write in the url or what should i do to implement this...

thanks a lot...