The recent VPN Filter malware revealed the abundance of security issues in many of the Internet routers we rely on every day. One vulnerability you can close right away involves universal plug and play (UPnP), a service for automatically configuring some devices on the network. Turn it off unless you’re sure you need it.

Everything from your Wi-Fi router to a new baby monitor might ship with a default username and password, such as “admin” for both credentials. You should change them right away to prevent exposure to botnets designed to take over devices with easily guessed logins.