yep, and if you got a router inside your lan you need to setup NAT to the DVR, remember that it'll be public facing... (so keep it as secure as you can, https and good secure password)
lol, thanks for the reply but you just said alot of stuff i dont understand I have broadband through a router with wireless that is protected by WEP?
Well, is your DVR box going to wired or wireless? What make is it? I'll give it a bash to try and explain (not the best gifted doing that...)
IF it's wired:
LAN cable from DVR will plug into the broadbad router (if it has more then one switch port), once you start the DVR it will more then likely get a DHCP address handed out by the nice broadband router. (just like when you start your pc/laptop) that address will not be publicly accessable. Your router hands out 'black' IP's. The routers job is to take this address and NAT (translate it to a public address, look at it as a unique worldwide postcode). For you to access the DVR from outside your routers network you need to access the routers external address (postcode) once you hit this address the router won't know what to do with it unless you tell it you want to send any packets hit on a certain port to the 'black' IP on the inside, by default it'll drop this if there is no specific rule setup for it... not sure you're following this, not sure I am
Get me the model of the router and I can check how to do it and write you a guide... in short you need to do some work on the router to be able to access the DVR from the outside (from a sunny beach somewhere ), set a static IP on the DVR or use the MAC address to reserve it in the DHCP server... etc. Sure PM me the model and we'll take it from there.