In today's world of permanent Internet connectivity, whether through Wi-Fi or Ethernet, a firewall is an essential component of your device's security. This software – or in some cases, a separate ...

If you see the message Security or firewall might be blocking the connection following completion of Windows Network Diagnostics to determine what’s causing internet or network connection issues on ...

People write in with mysteries all the time. One is why their Mac (and sometimes other devices) will seemingly connect to a Wi-Fi network just fine but not be able to access the internet via that ...