[KB2899] My application, printer or other external device is not working with ESET firewall (15.x – 16.x)


  • have a known conflict with IDS settings in ESET Smart Security
  • A third-party application or a peripheral on your computer is not working properly when the ESET firewall is in Automatic mode
  • Other products this issue may affect include:
    Ceton InfiniTV


    Rosetta Stone
    Network Printers
    NAS Hard Drives


Click to expand

If Automatic filtering mode is preventing an application from working properly, set the firewall to Interactive filtering mode to create the rules that grant the program's proper function and then set the firewall back to Automatic filtering mode. To learn more about the different firewall modes, see the following Knowledgebase article:

In Interactive mode, when communication is detected and no existing rules apply to that communication, a dialog window reporting an unknown connection will be displayed. The dialog window gives the option of allowing or denying the communication, and the decision to allow or deny can be remembered as a new rule for the firewall. If you choose to create a new rule at this time, all future connections of this type will be allowed or blocked according to the rule.


macOS users

Firewall troubleshooting

This article is part of a series of recommended steps to troubleshoot firewall issues. Start with step 1.


Resolve issues with HP printers

Before proceeding: find the IP address of your printer

You will need to know the IP address for your printer to complete the steps below. In most cases, you can find this info by following the steps below:

  1. Press the Windows key + R key on your keyboard to open a run dialog.

  2. Type Control Printers into the Open field and press Enter.

  3. Right-click the printer that you are having issues with and select Printer properties from the context menu. The IP address should be displayed in the Locations box under the General tab.

  4. If the IP address is not listed under General Locations, click the Ports tab and then click Configure Port. Under Dll locate System Info, the IP address may also be shown here.

  5. If you are still unable to locate your printer's IP, you can try using the IP address of your router, which is most likely the same IP used by the printer if it is a network printer. This can be found using the IPconfig command (view instructions to find the IP address of your router).

  1. Open the main program window of your ESET Windows product.

  2. Press the F5 key to open Advanced Setup.

  3. Click Network Protection, expand BasicZones and click Edit next to Zones.

Figure 1-1
  1. Select Addresses excluded from IDS and click Edit.

Figure 1-2
  1. In the Edit zone window type the desired IP address or range of IP addresses in the Remote computer address (IPv4, IPv6, range, mask) field and click OK.

Figure 1-3
  1. Click OK two more times to exit the Advanced setup window and save your changes. If prompted by User Access Control (UAC), click Yes. You should no longer experience issues with your HP printer.

Apple TV users

If you are experiencing issues using your Apple TV with the ESET Personal firewall, first complete the steps above to create the necessary firewall rules and then see the instructions below to allow Inbound/Outbound communications on the ports used by Apple TV (TCP 123, TCP 3689, UDP 5353).

  1. Open the main program window of your ESET Windows product.

  2.  Press the F5 key to open Advanced Setup.

  3. Click Network Protection → Firewall, expand Advanced and click Edit next to Rules.

Figure 2-1
  1. In the Firewall rules window click Add.

Figure 2-2
  1. Give your new rule a name (for example Allowed Apple TV Ports), select Both from the Direction drop-down menu and Allow from the Action drop-down menu. Make sure the Protocol drop-down menu has TCP & UDP selected.

Figure 2-3
  1. Click the Local tab and in the Port field type in the following port numbers: 123, 3689, and 5353. Click OK.

Figure 2-4
  1. Your new rule will be added to the Application/Rule list. Click OK again to exit the Firewall rules window. Click OK to exit Advanced setup. If prompted by User Access Control (UAC), click Yes.

Figure 2-5

Resolve issues with QuickBooks

A. Exclude ports used by QuickBooks
  1. Open the main program window of your ESET Windows product.

  2. Press the F5 key to open Advanced Setup.

  3. Click Network Protection → Firewall, expand Advanced and click Edit next to Rules.

  4. Click Add.

  5. Type a name for your rule into the Name field. Select Both from the Direction drop-down menu, Allow from the Action drop-down menu, and TCP & UDP from the Protocol drop-down menu.
Figure 3-1
  1. Click the Local tab and type the port for your version (year) of QuickBooks. In this example, we are excluding the ports for the 2016 version. When you are finished, click OK.

Exclude ports based on your version of QuickBooks

The ports used by each version of QuickBooks are listed below:

  • QuickBooks 2017:8019, 56727, 55373-55377
  • QuickBooks 2016: 8019, 56726, 55368-55372
  • QuickBooks 2015: 8019, 56725, 55363-55367
  • QuickBooks 2014: 8019, 56724, 55358-55362
  • QuickBooks 2013: 8019, 56723, 55353-55357

If you have multiple versions of QuickBooks installed on your system, add each version's corresponding ports in the following format: 8019, XXXXX, XXXXX, XXXXX, XXXXX.

Figure 3-2
  1. Click OK.

Figure 3-3
  1. Click OK. Continue to Part B.

Figure 3-4
B. Exclude the following executables used by QuickBooks
  1. Exclude files or folders from scanning in ESET Windows home products.

  2. Type in the following file paths into the blank field (make sure to press Enter after each one):

C:Program FilesIntuitYOUR QUICKBOOKS YEARAutoBackupExe.exe 
C:Program FilesIntuitYOUR QUICKBOOKS YEARDbmlsync.exe
C:Program FilesIntuitYOUR QUICKBOOKS YEARDBManagerExe.exe
C:Program FilesIntuitYOUR QUICKBOOKS YEARFileManagement.exe
C:Program FilesIntuitYOUR QUICKBOOKS YEARFileMovementExe.exe
C:Program FilesCommon FilesIntuitSyncIntuitSyncManager.exe
C:Program FilesCommon FilesIntuitQuickBooksQBCFMonitorService.exe
C:Program FilesIntuitYOUR QUICKBOOKS YEARQBGDSPlugin.exe
C:Program FilesCommon FilesIntuitQuickBooksQBLaunch.exe
C:Program FilesCommon FilesIntuitQuickBooksQBServerUtilityMgr.exe
C:Program FilesIntuitYOUR QUICKBOOKS YEARQBW32.exe
C:Program FilesCommon FilesIntuitQuickBooksQBUpdateQBUpdate.exe
C:Program FilesIntuitYOUR QUICKBOOKS YEARQuickBooksMessaging.exe
C:Program FilesQuickBooks Online BackupOnlineBackup.exe

While excluding these paths

Make sure to replace YOUR QUICKBOOKS YEAR listed in the file paths above, with the actual year of your QuickBooks software (2016, for example). If you are running a 64-bit system, replace Program Files with Program Files (x86)

Resolve issues with TWAIN

If your ESET product is conflicting with your TWAIN device, you need to add the IP of the TWAIN device to the Excluded IP addresses list in your business product.