How to connect DVR via internet to watch CCTV cameras from a remote place

[vinhnz]

Hello Helper//
I have the Dvr in my store office and the set up I have done like this
I Connected the DVR to your router
assign internal IP and gateway the same number

This Local IP I have set the same Gateway range as the Router. as 192.168.1.100

and I got the SubNet Mask, which is typically 255.255.255.0, and also use the same gateway.
the Port in manual I set as 09000
and olso set up password and download the software from the disk it come with manual
the software is Netviewer, and all work fine when I test from the router from only the store
BUT I can not view it from internet at home, every time I type in and the message will say< Log on Failed>
So far I just log on in my store office only
Any one help please please////