Having a DNS record can help when other sites or servers must also enter your disaster recovery server into their security Settings.

如果其他站点或服务器也必须把您的灾难恢复服务器输入它们的安全设置，有DNS记录会有帮助。

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While it would have been possible for me to set up this service from a site with an assigned domain on a static IP address, I felt that a dynamic DNS would offer several security advantages.

虽然我可以用一个静态IP地址在拥有已分配的域的站点中建立这种服务，但是我觉得动态dns应该可以提供一些安全上的好处。

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Listing 7 shows some of the system calls counted when using DNS for security.

清单7显示了在使用DNS确保安全时，对一些系统调用进行统计。

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Because his servers had long ago added an extra security identifier to their DNS requests, OpenDNS circumvented Kaminsky's hack.

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Ulevitch's hacker paranoia inspired him to add an extra security feature: All DNS servers tag data with one random number (from 1 to 65, 000) to enable servers to recognize the right piece of data at the right time.

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It also offers a range of security services, including managed DNS, Distributed Denial of Service (DDoS) mitigation and cyber-threat reporting.

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