Applications, websites, or services may not work as intended when a firewall blocks authorised traffic. Firewalls guard systems against illegal access, but poor settings can compromise connectivity. This manual offers detailed instructions for precisely addressing firewall problems.
Common Causes of Firewall Blocking Issues
- Overly Strict Security Settings – Default rules may block necessary traffic.
- Blocked Ports – Some applications require specific ports to function.
- Antivirus and Firewall Conflicts – Security software may interfere with firewall settings.
- Corrupt Firewall Configuration – Misconfigured settings can block essential services.
- Network Profile Restrictions – Public network settings may limit traffic.
How to Fix Firewall Blocking Traffic Issues
Check the Firewall Logs
Open Windows Defender Firewall (Control Panel -> Windows Defender Firewall).
Click Advanced Settings ->Monitoring Firewall Logs.
Identify blocked applications or IP addresses.
Allow an Application Through the Firewall
Open Windows Defender Firewall.
Click Allow an app or feature through Windows Defender Firewall.
Select the application and check both Private and Public networks.
Temporarily Disable Firewall
Open Control Panel -> Windows Defender Firewall.
Select Turn Windows Defender Firewall on or off.
Disable firewall temporarily and check connectivity.
Open Required Ports
Open Windows Defender Firewall → Advanced Settings.
Click Inbound Rules -> New Rule.
Select Port, specify the required port number, and allow the connection.
Reset Firewall to Default Settings
Open Windows Defender Firewall → Advanced Settings.
Click Restore Defaults to reset settings.
Check Antivirus and Third-Party Security Software
Some security suites include additional firewalls that may block traffic.
Disable third-party firewalls and test the connection.
Change Network Profile Settings
Go to Settings -> Network &Internet -> Status.
Click Change connection properties and select Private Network.
Run Windows Firewall Troubleshooter
Type Firewall Troubleshooter in the Windows search bar.
Run the tool to detect and fix firewall issues automatically.
Configure Firewall Rules Manually
Open Windows Defender Firewall → Advanced Settings.
Click Inbound Rules -> New Rule -> Program.
Select the executable file and allow the connection.
Reinstall or Update Firewall Software
If using a third-party firewall, update it to the latest version.
If issues persist, reinstall the firewall software.
Adjusting firewall settings correctly ensures security without blocking essential services. If you need expert help, TechNow provides the Best IT Support Services in Germany for all software issues related in Germany.
