Avast Firewall Blocking QuickBooks: Ensuring Smooth Operation

QuickBooks is a steadfast ally in the business world, streamlining your financial management with precision and ease. Yet, imagine the sudden jolt when Avast Firewall, your digital shield, unexpectedly turns against this ally, blocking QuickBooks and throwing your financial harmony into chaos. However, this digital dilemma of Avast Firewall blocking QuickBooks isn’t just a minor inconvenience; it’s a blockage in your financial workflow, a wrench in the gears of efficiency. However, there’s a beacon of hope. 

If Avast Firewall is blocking QuickBooks, open Avast and navigate to ‘Menu’ > ‘Settings’ > ‘Protection’ > ‘Firewall.’ In ‘Application Settings,’ find QuickBooks and set it to ‘Allow’ for both inbound and outbound connections. This change permits QuickBooks to operate without interference from the firewall.

The resolution to this standoff between essential software and crucial security lies in a few simple tweaks to your Avast Firewall settings, a bridge to reunite these powerful tools in harmony as Avast Firewall blocking QuickBooks.

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Understanding The Conflict Between Avast Firewall And QuickBooks

Avast Firewall is a robust protector against digital threats, meticulously monitoring data exchanges. However, this vigilance can inadvertently disrupt QuickBooks, a critical tool for financial management. So, Avast might misinterpret QuickBooks’ network activities as potential risks, thereby blocking its operations.

However, common symptoms of the Avast Firewall blocking QuickBooks conflict include QuickBooks struggling to connect to the internet, updates failing to download, or inability to send invoices or use online banking features. However, users might encounter error messages indicating a network connection failure, or QuickBooks may operate sluggishly or freeze when Avast is active. For a comprehensive understanding of Avast Firewall’s impact on system performance, including potential issues and resolutions, you can explore further.

Step-By-Step Solutions To Resolve The Issue

Below are the different solutions that you can follow step by step to resolve Avast Firewall blocking QuickBooks.

Manual Configuration Of Firewall Ports:

  1. Open Avast and navigate to ‘Menu’ > ‘Settings’ > ‘Protection’ > ‘Firewall.’
  2. Access the ‘Settings’ and select ‘Advanced settings’.
  3. Here, add the specific port numbers used by QuickBooks: typically, 8019, 56728, 55378-55382.
  4. Lastly, ensure these ports are allowed for both inbound and outbound connections as Avast Firewall blocking internet. Learn more about managing Avast Firewall settings.

Adding QuickBooks As An Exception In Avast Firewall:

  1. In Avast, go to ‘Menu’ > ‘Settings.’
  2. Select ‘General’ and find ‘Exceptions.’
  3. Click ‘Add Exception’ and browse to add QuickBooks executable files.
  4. Save the changes to allow QuickBooks through the firewall.

Temporarily Disabling Avast Firewall:

  1. Access Avast’s main interface.
  2. Go to ‘Protection’ and select ‘Firewall.’
  3. Temporarily turn off the Firewall. So, remember to enable it again after using QuickBooks when Windows Firewall blocking QuickBooks.

Using QuickBooks File Doctor Tool:

  1. Download and install the QuickBooks File Doctor Tool.
  2. Run the tool to diagnose and fix connectivity issues automatically to block QuickBooks from internet.

Additional Troubleshooting Tips

How to block QuickBooks from accessing the internet? In addition to the specific solutions mentioned, there are other potential actions you can take to resolve conflicts between Avast Firewall and QuickBooks for Avast Firewall blocking QuickBooks:

  • Turning Off Unwanted Programs In Avast: Other programs monitored by Avast may sometimes interfere with QuickBooks. Review Avast’s blocked programs list and turn off monitoring for programs that are not security risks but may conflict with QuickBooks.
  • Checking For False Positive Detections: Avast may sometimes mistakenly identify QuickBooks components as threats, a situation known as a false positive. However, regularly check Avast’s virus chest for any QuickBooks files and restore them if necessary as QuickBooks Windows Firewall is blocking QuickBooks. To understand more about false positives and how to manage them, see here.
  • Creating Custom Rules In Avast Firewall: Beyond just allowing QuickBooks, you can build custom rules in Avast Firewall to define how and when QuickBooks should access the network, providing a more tailored solution.
  • Checking QuickBooks Database Server Manager: If you’re using QuickBooks in a networked environment, ensure the QuickBooks Database Server Manager is appropriately set up and running. Hence, it should be added as an exception in Avast Firewall as well.
  • Reviewing Network Settings: Sometimes, network settings on your PC can cause issues. However, ensure your network is set to ‘Private’ rather than ‘Public,’ as some firewall rules differ based on these settings.

See Also: Why Does Avast Keep Turning Off? Issue Fixed!


How do I stop Avast from blocking a program?

Open Avast, go to ‘Menu’ > ‘Settings’ > ‘General’ > ‘Exceptions.’ Click ‘Add Exception,’ browse, select the program, then save changes.

Why does Avast keep blocking websites?

Avast blocks websites if it detects potential security threats. Adjust web shield settings or add the website as an exception in Avast settings.

How do I change firewall settings in Avast?

In Avast, navigate to ‘Menu’ > ‘Settings’ > ‘Protection’ > ‘Firewall.’ Here, you can modify settings for network connections and applications.

Can Avast block internet access?

Yes, Avast can block internet access if it identifies suspicious network activity. Adjusting firewall settings can prevent unnecessary blocking.

Why does my antivirus keep blocking websites?

Antivirus software blocks websites deemed unsafe or potentially harmful. You can manually allow trusted websites in your antivirus settings.


Navigating the intersection between Avast Firewall and QuickBooks can initially seem daunting as Avast Firewall blocking QuickBooks. However, you can often resolve these conflicts by systematically applying the solutions discussed – from manually configuring firewall ports and adding exceptions to using specialized tools like QuickBooks File Doctor. However, if issues persist despite these efforts, it’s advisable to seek expert help from QuickBooks support or a computer technician familiar with Avast. Remember, ensuring seamless operation between your antivirus and financial software is crucial for security and business efficiency.

See Also: Avast Behavior Shield Turned Off: How To Reactivate & Enhance Security

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