during the last few weeks following the threads here, I realized that most of the problems people have during authorization are encountered regularly. I would like to propose some kind of a web service, similar to unboundtest.com, where one could enter a list of domain names that will be checked against common misconfiguration:
- non-resolvable domain names
- mixed ip address delegations within one set of domain names
- non-reachable port 80/443
- differences in IPv4 and IPv6 access
Of course, this list is not complete - please add your comments here. After having identified the most common problems, we could argue about where to host that service and who wants to contribute.