For running this application, first of all, you should be connected to a network and your firewall ought to be deactivated. Then, check your network and firewall.

使用这些代码并不像你想像的那样简单，因为你应当在至少两台通过同一网络相互关联的电脑上运行它，如果你认真的阅读了下面的内容，你将可以运行和测试这些代码。

youdao

But I don't really know about how long it would take people to hack, like, the general firewall

但我不知道人们具体要用多长时间才能穿过防火墙，

理想是当密码专家 - SpeakingMax英语口语达人

Most firewall vendors include a VPN application as a part of the firewall itself.

FORBES: Teach Your Boss to Speak Security: Economy of Mechanism

Check Point created the first firewall using "stateful inspection" -- the second-generation of firewall technology widely used today.

CNN: SHARE THIS

As I've said in the past, European leaders have taken significant steps in implementing a firewall, establishing a firewall, and in various countries implementing reforms that are necessary.

WHITEHOUSE: Press Briefing