Thanks for response.
This morning remote viewing started working without anyone doing any work about the whole thing.. Maybe router needs "hard" reboot (power off / on; the router was off during the night)? I did click on "save and reboot" after any changes in configuration that required reboot.. Strange..
Anyway, now there's a new problem.. How to view it via 3G (trying on Nokia N70, opera and builtin browser)? I tried IP and dyndns account, can't access anything..