I'd like to know if any certificates support a double wildcard like *.*.example.com
? I've just been on the phone with my current SSL provider (register.com) and the girl there said they don't offer anything like that and that she didn't think it was possible anyway.
Can anyone tell me if this is possible, and if browsers support this?
Best Answer
RFC2818 states:
Internet Explorer behaves in the way outlined by the RFC, where each level needs its own wildcarded certificate. Firefox is happy with a single *.domain.com where * matches anything in front of domain.com, including other.levels.domain.com, but will also handle the *.*.domain.com types as well.
So, to answer your question: it is possible, and supported by browsers.