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百度蜘蛛域名为何不给反向验证？

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  •   aaa0009 · Aug 10, 2016 · 1989 views
    This topic created in 3624 days ago, the information mentioned may be changed or developed.
    要验证蜘蛛需要双向验证，从 ip 到 hostname ，然后冲 hostname 到 ip ，都匹配了才可以认为是真实的蜘蛛。然而为何，百度蜘蛛 hostname 不给 ip 呢？比如 180.76.15.159 可以得到 baiduspider-180-76-15-159.crawl.baidu.com ，然后 baiduspider-180-76-15-159.crawl.baidu.com 得不到 180.76.15.159
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