yes you need to open the port in your router
most router can be managed via web interface

will also give you the gateway ip, this is your router and you can call the ip in your webbrowsers address bar.
for login information consult the backside of your router. the ip should be there too.

once you are logged in you need open the tcp port for the ip4 address where your node is running.
it should be under "internet" and "port forwarding" never used asus router
but it should be easy to find, also there must be a million tutorials out there on how to open a port
good luck

_{kw31 #deeponion c113w587/07}