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Antivirus or firewall may block VPN connections


Some antivirus and firewall software will interact with the VPN connection. You might need to turn off SSL (port 443) monitoring. We are aware of this issue with the following software products:

  • NOD32 Antivirus:
    select Setup > Advanced Setup > Antivirus and antispyware > Web access protection > HTTP, HTTPS > HTTP scanner setup, and set HTTPS filtering mode to Do not use HTTPS protocol checking. If HTTPS filtering mode is greyed out, you must first set Antivirus and antispyware > Protocol filtering > SSL to Always scan SSL protocol. Restore this to its previous setting after changing HTTPS filtering mode<.

  • Kaspersky:
    select settings > Traffic Monitoring panel > Port Settings or settings > Network -> Port Settings and uncheck the box for port 443/SSL.