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Adjust Protocol filtering settings to prevent computer disruptions due to network traffic scanning (Business Edition 3.0)

Issue

  • This article applies to ESET Business Edition products version 4.x, which are currently in Basic Support status

Solution

End of support for version 4 and earlier of ESET Mail Security products

The Antispam functionality in ESET business products version 4 and earlier will reach end-of-life March 31, 2018. After this date, the Antispam protection will no longer function but the products will continue to receive detection updates to protect against malware until December 2018.

Both ESET Smart Security 3.0 and ESET NOD32 Antivirus 3.0 scan network traffic for viruses by using the ESET kernel service (ekrn.exe) as an internal proxy server.

By default, your ESET product automatically detects programs that are used as web browsers and email clients, and adds them to the list of programs that the internal proxy scans. This can cause loss of internet connectivity or other undesired results with applications that use network features but are not web browsers/email clients.

This can be fixed by adjusting the settings of the internal proxy, or protocol filter, to ensure that it is only being used for web browser and email applications:

  1. Open ESET Smart Security or ESET NOD32 Antivirus. How do I open my ESET product?
     
  2. Press the F5 key to display the Advanced Setup window.
     
  3. From the Advanced Setup tree, click Personal firewall → Protocol filtering (for ESET Smart Security) or Antivirus and antispyware → Protocol filtering (for ESET NOD32 Antivirus).
     
  4. Select the Applications marked as Internet browsers and email clients option.


    Figure 1-1
     
  5. From the Advanced Setup tree, click Antivirus and antispyware Web access protection HTTP Web browsers and make sure that only the applications you want scanned are selected. Typically only web browsers (iexplorer.exe, firefox.exe, etc.) need to be selected.
     
  6. From the Advanced Setup tree, click Antivirus and antispyware → Email protection → POP3 → Email clients and make sure that only the applications you want scanned are selected. Typically only email clients (outlook.exe, thunderbird.exe, etc.) need to be selected.
     
  7. Click OK to save your changes.


    Figure 1-2
     


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