I have been using Universal Links since January of this year. As of January, it was working fine, but when I checked its operation in August, it was no longer working properly.
After investigating, I believe that the reason it is not working is because our firewall is blocking communication from AppleCDN to check for AASA files.
Our firewall blocks communication from outside Japan, and Apple's IP address (17.0.0.0/8) is whitelisted.
Does anyone know the hostname or IP address that is used to check AASA files? If you know, please let me know.
