Network security is not just for IT professionals. Even home users need to keep their networks secure to prevent unauthorized people from, for example, hogging their broadband, installing malware that turns connected devices into robots in botnets, and spying on what you and your family are doing.
In the past, the internal network was often considered safe and protection against threats from the internet was the most important thing, but today security experts recommend using encrypted connections as much as possible even within the local network.
It may seem complicated, but with basic knowledge and the right settings in your router, you’ll go a long way.
These are actually all very basic and essential considerations, and are well worth revisiting. I realised I’m not actually using the SNMP management on my router, but I’d left it enabled. Disable those types of services if you don’t use them, and rather enable logins etc only from your LAN.