Did you have a public IP and remote SSH/HTTP access enabled?
For a very basic view of currently active connections, WebUI has a Status -> Realtime Data -> Connections monitoring window.
A more detailed connections and traffic data can be obtained by installing Darkstat package. You can install it with the following commands:
- opkg update
- opkg install darkstat
- /etc/init.d/darkstat enable
- /etc/init.d/darkstat start
Then open your browser and enter routers IP with added 667 port. For example:
Host section can provide quite detailed statistics on each IP address monitored by the application.
Alternatively, you can install TCPdump from Services -> Package manager and enable monitoring for mobile wwan0 (mob1s1a1_4) interface and download the file later from the same page.