Alerte zoneAlarm

Bonjour,
j'ai souvent genre d'alerte :

ZoneAlarm has blocked access to port 16932 on your computer

ZoneAlarm has successfully stopped local network or Internet traffic from reaching your computer. No breach in your security has occurred. Your computer is safe.
What happened?

ZoneAlarm blocked traffic to port 16932 on your machine from port 56807 on a remote computer whose IP address is 86.76.68.228. This communication attempt may have been a port scan, or simply one of the millions of unsolicited commercial or network control messages that are routinely sent out over the Internet. Such unsolicited messages are often called Internet background noise.

Should I be concerned?

This alert should not be a cause for concern. ZoneAlarm has protected your machine according to the firewall settings you have selected.

What should I do?

You do not need to do anything about this alert unless one of your programs is not functioning correctly or is unable to complete a task. In that case, you can temporarily lower your security level to medium to allow traffic to reach your computer. . Additional Program configuration options can be found in the help files.

Est-ce normal?