我在dynect.net上添加2-01-3d52-0001.cdx.cedexis.net时收到无效的cname错误。知道我为什么会收到这个错误吗? cname有什么问题?
答案 0 :(得分:0)
看起来您的DNS服务器根据过时的RFC检查域名的有效性:
http://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_host_names
那里引用的旧RFC http://tools.ietf.org/html/rfc952说:
第一个 字符必须是字母字符。
当前的http://tools.ietf.org/html/rfc1123说:
2.1主机名和号码
The syntax of a legal Internet host name was specified in RFC-952 [DNS:4]. One aspect of host name syntax is hereby changed: the restriction on the first character is relaxed to allow either a letter or a digit. Host software MUST support this more liberal syntax.