Wildcard for second level subdomain
问题 AWS Certificate manager isn't allowing me to add a 2 level wildcard domain name, which would match x.a.example.com , y.b.example.com etc. Is there a workaround for this? (instead of creating *.a.example.com , *.b.example.com etc) 回答1: Source: http://docs.aws.amazon.com/acm/latest/userguide/acm-certificate.html Wildcard Names ACM allows you to use an asterisk (*) in the domain name to create an ACM Certificate containing a wildcard name that can protect several sites in the same domain. For