The connection everything depends on.
WHAT TO SECURE
Your router Your wireless network What connects to it
WHAT TO DO WITH THE ROUTER
Change the default administrator password Apply firmware updates Disable remote administration unless you need it Disable features you do not use
THE DEFAULT PASSWORD POINT
Default credentials for common routers are published.
Changing it is the single most important step.
THE FIRMWARE POINT
Router updates are neglected more than any other.
Check whether yours updates automatically, and if not, check periodically.
WHAT ELSE TO CONFIGURE
A strong wireless password Current encryption, not an outdated standard A separate network for guests
WHAT TO DISABLE
Features enabled by default that you do not use.
WHAT TO REVIEW
What is connected to your network.
Unrecognised devices are worth investigating.
WHAT TO REPLACE
A router no longer receiving firmware updates.
