Network Security

[milomak]

as stated in the op

i have set it up such that i can through a ddns type service access sabnzbd, sonarr and couchpotato.

How?

through portforwarding

so assume i use username.ddnsservice.com. then pointing to that site and using one of 3 ports i have selected will access sonarr, couchpotato or sabnzbd.

username.ddnsservice.com:xxx1/2/3 ---> forwards to one of the sonarr, couchpotato or sabnzbd services.

the port in my screenshot is not one of the ports i use to forward. but is the actual port that was trying to access the kodi box.

[milomak]

so i noticed that that happens when i put the kodi's internal ip address in the dmz on the router