cctv internet viewing setup problem

Hello
I have a Lorex CCtv system which has a ethernet port on the back. I want to set it up where I can see from any computer via internet what should i do.the setup process is so confusing.
I ran the network cable from the cctv to the router.
my laptop is also connected to the same router.

If you don't have the manual, ten go to www.lorextechnology.com and download one.

i called lorex customer support and they walked me to set it up where i can watch it my laptop at work which is using same network as cctv
but i cannot watch it from any other computer online
what should i do

You will need the manuals of your DVR and your router.

Some general information on this can be found in the following thread:
How to connect DVR via internet to watch CCTV cameras from a remote place (static IP)