access an ip camera from a different network

[unwashed potato!]

so i have a cctv that's connected to my network through the router.

from a computer that's on the same network i simply enter 192.168.1.xx:xxxx

what i'd like to be able to do is access the feed from any network.

is there a simple way to do this? i know the MAC address if that's any use?

 

[unwashed potato!]

thanks guys got it working. is it dangerous to post the ip then? the device actually has a dns so i can input that instead however it just redirects to the ip any way.