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Windows provides a built-in firewall, which controls how programs access the Internet. If Windows Firewall doesn't permit Firefox to make connections, Firefox generates a "Server not found" error when you try to browse to websites. Note: This article only applies to Windows. To see instructions, choose the Windows version from the dropdown menu above. Table of Contents
Note: Steps for Windows 11 may differ. Checking for Windows 10 FirewallTo see if you're running Windows Firewall:
Configuring Windows 10 FirewallIf you're running Windows Firewall and having connection problems in Firefox:
Checking for Windows 8 FirewallTo see if you're running Windows Firewall:
Configuring Windows 8 FirewallIf you're running Windows Firewall and having connection problems in Firefox:
Windows 7Checking for Windows 7 FirewallTo see if you're running Windows Firewall:
Configuring Windows 7 FirewallIf you're running Windows Firewall and having connection problems in Firefox:
Windows VistaChecking for Windows Vista FirewallTo see if you're running Windows Firewall:
Configuring Windows Vista FirewallIf you're running Windows Firewall and having connection problems in Firefox:
Checking for Windows XP FirewallTo see if you're running Windows Firewall:
Configuring Windows XP FirewallIf you're running Windows Firewall and having connection problems in Firefox:
These fine people helped write this article: VolunteerGrow and share your expertise with others. Answer questions and improve our knowledge base. Learn More How do I allow Microsoft edge to access the network in my firewall?Turn Microsoft Defender Firewall on or off. Select Start , then open Settings . ... . Select a network profile: Domain network, Private network, or Public network.. Under Microsoft Defender Firewall, switch the setting to On. ... . To turn it off, switch the setting to Off.. How do I unblock Microsoft edge firewall?Replies (5) . Open Control Panel, locate Windows Firewall.. On the left navigation pane, select Restore Defaults.. Click on the Restore button to restore Firewall.. How do I change firewall settings to enable network connection?In this article. Go to Start and open Control Panel.. Select System and Security > Windows Defender Firewall.. Choose Turn Windows Firewall on or off.. Select Turn on Windows Firewall for domain, private, and public network settings.. How do you fix Security or firewall settings might be blocking the connection?Fixes for Security or Firewall Settings Might Be Blocking the Connection.. Press Windows + S and type Windows firewall.. Select Windows Defender Firewall from the search result.. Click Restore defaults in the left pane.. Click on the Restore defaults button again.. Click Yes to confirm.. |