任何有能力的黑客都可以在每次访问表单时伪装其IP地址，因此能够非常容易地让简单的安全检查失效。

Any competent hackers can spoof their IP address every time they visit the form, so they can easily subvert that simple security check.

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Web的防护性设计通常关注最常见的失效点：表单、搜索、地址栏以及服务器问题。

Defensive design for the Web usually focuses on the most common points of failure: forms, search, the address bar and server problems.

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如果gd b调试器可以读取core文件，它就可以分析出失效发生的地址(例如，Segmentation fault in function_name at 0x10001234)。

If the GDB debugger is able to read the core file, it indicates the address where the failure occurred (for example, Segmentation fault in function_name at 0x10001234).

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