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Your computer may send and receive a variety of legitimate network traffic, particularly if you are on a home or business Local Area Network (LAN). Using ZoneAlarm Anti-virus in a default configuration (for example, High security is applied to the Internet Zone, while Medium security is applied to the Trusted Zone) will keep you safe from the vast majority of Internet attacks.
However, you should be concerned if you were surprised by this alert--that is, if you were unaware that you had created an Expert rule that allows this type of traffic.
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