Not yet registered domain is not available for registration in PBA, attempts to register it fail with
Not Available status for this domain or with an error
Domain already registered.
Steps to resolve
Check the whois checker that is configured for the tld:
Home > System > Settings > Domains > TLDs tld -> First Checker
a) if it is not configured, it is required to configure it. If a registrar supports domain availability check for a zone, this registrar can be assigned as checker to a zone, if no – then Whois plug-in should be configured;
b) verify WHOIS configuration, check the RegEx, logs.
IP restriction, one of the errors below appear in the log (WHOIS or REGISTRAR.log):
Connection denied. Your host (x.x.x.x) is not authorized to use this service. whois.server.tld: access denied for xx.xx.xx.xx
Reason: IP address of the PBA Management Node (Application server) is restricted to use the WHOIS server configured for the problem domain zone.
Contact administrators of the WHOIS server (registrar support) to resolve the problem, e.g. to add IP address of the PBA Management Node to the authorized hosts list.
Incorrectly configured RegExp.
Run the command directly on the PBA server:
# whois [domain] -h [whois server]
You will see the sentence
not availableor similar that must be used as a RegEx.