Hello. I can't add an fqdn host (assets-->fqdn host) if the name contains "_". I get a message "You must enter a valid value for FQDN". If I remove the "_" symbol I can save it.
FQDN host are used for domain names with DNS resolution ( public FQDN domains) and "_" is not supported by domain name so it is not in supported character list.
Yes , it do support for domain name which are not publically listed ( hosted website domain names) and general usecase for the FQDN is to resolve all this domain name for the frirewall rule.
However taking this as input for validation check and support characters for internal domain also.
