子域中带有后缀的 DNS 通配符
DNS Wildcard With Suffix in Subdomain
是否可以在子域中使用带后缀的 DNS 通配符？
示例：
A Record:
*foo.example.com -> 192.0.2.1
Resolves:
test1-foo.example.com
test2-foo.example.com
test3-foo.example.com
这可能吗？或者，通配符是否需要整个子域，例如 *.example.com
Is it possible to have a DNS wildcard with a suffix in the subdomain?
没有
通配符不能那样工作。
所有解释请参见 RFC8499 和 RFC4592，尤其是第二个。
2.1.1. Wildcard Domain Name and Asterisk Label
A "wildcard domain name" is defined by having its initial (i.e.,
leftmost or least significant) label be, in binary format:
0000 0001 0010 1010 (binary) = 0x01 0x2a (hexadecimal)
The first octet is the normal label type and length for a 1-octet-
long label, and the second octet is the ASCII representation [RFC20]
for the '*' character.
简而言之，*foo 不是 每个 DNS 规则的通配符。
是否可以在子域中使用带后缀的 DNS 通配符？
示例：
A Record:
*foo.example.com -> 192.0.2.1
Resolves:
test1-foo.example.com
test2-foo.example.com
test3-foo.example.com
这可能吗？或者，通配符是否需要整个子域，例如 *.example.com
Is it possible to have a DNS wildcard with a suffix in the subdomain?
没有
通配符不能那样工作。
所有解释请参见 RFC8499 和 RFC4592，尤其是第二个。
2.1.1. Wildcard Domain Name and Asterisk Label
A "wildcard domain name" is defined by having its initial (i.e., leftmost or least significant) label be, in binary format:
0000 0001 0010 1010 (binary) = 0x01 0x2a (hexadecimal)The first octet is the normal label type and length for a 1-octet- long label, and the second octet is the ASCII representation [RFC20] for the '*' character.
简而言之，*foo 不是 每个 DNS 规则的通配符。