Vallum 是一款Mac上优秀的防火墙工具，简单易用，可以帮助我们监测和控制应用程序的网络连接情况，保护系统安全，很不错！
[Vallum 在官网上售价15美元，约合人民币90元]
软件介绍
Vallum is a little tool that helps you monitor and block application connections. It is able to intercept connections at the application layer, and hold them while you decide whether to pass or block them. Vallum's interface is very simple and is icon-based. Its default configuration is not intrusive, and it does not require any interaction or specific networking knowledge or skills. Just drag an app's icon from the Finder into the main Vallum window to block it. To change Vallum's attitude and interaction level, you just have to play with the very few options available.
软件截图
