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bind 9.6的帮助文档中有:
multiple-cnames This option was used in BIND 8 to allow a domain name to have multiple CNAME
records in violation of the DNS standards. BIND 9.2 onwards always strictly enforces the CNAME
rules both in master files and dynamic updates.
从这段话可以了解到9.2起在主文件和动态更新中都严格执行CNAME规则.CNAME规则应该包括
(flyaway57 朋友提供的资料)
If a CNAME RR is present at a node, no other data should be
present; this ensures that the data for a canonical name and its aliases
cannot be different. This rule also insures that a cached CNAME can be
used without checking with an authoritative server for other RR types.
在下愚见 要实现同名CNAME,MX只能通过修改BIND源码来实现。
综合llzqq ,anthonyfeng 的建议这样做还是有很大潜在风险。
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感谢版主大人llzqq,及楼上各位的热心支持。希望大家再各抒己见,相互学习,一起进步。
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