You can, for example, block all traffic that USES the TCP or UDP protocol or all traffic from a particular remote host by creating the appropriate rules.

您可以阻止所有例如TCP或UDP协议的通信或通过创建合适的规则阻止特定远程主机的通信。

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Most of the products we tested offer only three security settings: block all traffic, allow some traffic, and provide no security at all.

CNN: Insulate your PC from hackers

While Egypt has found it hard to block the tunnels, it has kept its official border with Gaza sealed to all but a trickle of humanitarian traffic, saying that the crossing's Palestinian side should be controlled by a proper government body, such as the PA, but not by Hamas.

ECONOMIST: Diplomacy after the Gaza war