So all you need to do is log into your router, find the port forwarding section and forward Port 80 on the WAN interface to the LAN IP of your DVR so that you can access it from anywhere on the interwebs
BTW why are you using a dodgy Chinese IP range for your secondary DNS ? Google for the primary makes sense
What he said.
Get port 80 forwarded to the DVR setup, putting the DVR on a static IP makes most sense for that.
Then get some Dynamic DNS client running (possibly in your modem) so you can use a name to call home, and it will auto update in case your modem IP changes.
Once that works some 'tricks' to make it all a bit safer.
Port 80 is a very easy target, moving it around will add a small amount of protection.
If your modem will let you get it to forward some strange port number through to port 80, so you would attach to jaws.dvr.houe:6548 and your modem will forward that onto 192.168.1.18:80
You may be able to tell the DVR it's webserver is on a different port which will have the same overall effect.
Last thing, if you are using their software instead of a web browser, it may be a different port that needs to be forwarded. 34598 is shown in part of the instructions.
Chris