如何从JAVA应用程序中获取所有DNS条目？ [英] How to fetch all DNS entries from JAVA application?

问题描述

到目前为止，我使用下面的代码获取给定IPAddress的DNS名称。而不是为网络中的每个IPAddress提取它，我想一​​次从DNS服务器获取所有DNS条目（IPAddress - HostName映射）。可能吗？如果是这样，怎么办？

As of now, I'm using the below code to get DNS name of the given IPAddress. Instead of fetching it for each IPAddress in the network, I want to fetch all the DNS entries (IPAddress - HostName mapping) from the DNS Server in one go. Is it possible? If so, how to do it?

InetAddress addr = InetAddress.getByName(address);
dnsname = addr.getCanonicalHostName().trim();

推荐答案

从公共DNS服务器，没有办法拉出所有数据。枚举所有IP地址是唯一的解决方案。

From a public DNS server, there is no way to pull out all the data it holds. Enumerating all the IP addresses one by one is the only solution.

如果您与DNS服务器有特殊关系（例如，由您的雇主管理）您可以向DNS管理员请求传输整个区域（称为AXFR的DNS请求）的权利。他们可以授权您的IP地址或给您一个TSIG密钥来验证自己。

If you have a special relationship with the DNS server (for instance, it is managed by your employer), you may request from the DNS administrator a right to transfer the whole zone (the DNS request known as AXFR). They may authorize your IP address or gives you a TSIG key to authentify yourself.

然后，您将不得不找到一种方法来进行区域传输（可能使用TSIG认证）在Java。使用这些关键字，我发现一些代码< a>和文档。使用代码搜索引擎，如 Google代码搜索或 Krugle 查找使用示例。

Then, you will have to find a way to do a zone transfer (possibly with TSIG authentication) in Java. Using these keywords, I find some code and documentation. Use a code search engine like Google Code Search or Krugle to find examples of use.

[DNS专家可能会尖叫在NSEC上使用区域走但大多数DNS区域并未与NSEC签名。]

[DNS experts will probably scream "Use zone walking on NSEC" but most DNS zones are not signed with NSEC.]

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