McAfee’s firewall protects your PC from unauthorised network access but occasionally blocks legitimate programs or internet connections. The fix is straightforward: create a firewall exception for the affected program rather than disabling the firewall entirely.
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Key Points
- Check if McAfee is blocking: temporarily disable McAfee Firewall → if internet works, McAfee was the cause
- Re-enable McAfee Firewall immediately after testing — never leave it disabled
- Whitelist a program: McAfee → Firewall → Internet Connections for Programs → find the app → change to ‘Full Access’
- Network blocked entirely: McAfee Firewall → Net Guard → check if your home network is blocked
- After Windows update: McAfee sometimes treats the new network as ‘public’ — change to ‘Home’ network type
- Gaming/software blocked: add the game’s .exe file to McAfee’s allowed programs list
- McAfee blocking a new printer or smart device: add the device to Trusted Devices in McAfee Firewall
- Disable firewall only temporarily for testing — always re-enable after
