In the
Status
menu,
Firewall
item you can check the firewall statistic. The
INPUT
means the
incoming, the
OUTPUT
the outgoing/transmitted and the
FORWARD
means the forwarded
communication/traffic hereby.
As it can be seen, there are several communicating IP addresses on several ports to the router and
subnet.
Another method for limitation can bve the whole disabling with opening and enabling only the
necessary communication ports, IP-segments or allowing exact IPs.
You can modify the firewall settings at the
Network
menu, at the
Firewall
item,
General
Settings
tab.