Why Is My Firewall Blocking Everything · Trending

Most modern firewalls (including Windows Defender and macOS Firewall) come with preset security levels: Low, Medium, and High.

In your firewall settings, look for (or similar for Mac/Third-party). Ensure the apps you need are checked for your active network profile. Identify the Blocker : why is my firewall blocking everything

Firewalls are designed to be "deny by default," but when they start blocking legitimate traffic, it’s usually due to one of a few common culprits. 1. Overzealous Security Levels Most modern firewalls (including Windows Defender and macOS

If you or a recent software update toggled the setting to "High" or "Block all incoming connections," the firewall is doing exactly what you told it to do—stopping everything. Identify the Blocker : Firewalls are designed to

I rebooted into safe mode, disabled the firewall, and the internet roared back to life. So the problem wasn’t the network. It was the firewall itself. But why? I hadn’t changed any rules. I hadn’t installed new security software. It was the same basic Windows Defender Firewall I’d ignored for three years.