When you say 'remove the FQDN', does that mean you revert to using an IP address? Perhaps it is reverting to use localhost/socket? Are you able to connect via the command line using the FQDN?
psql -h FQDN openfiredb
When you say 'remove the FQDN', does that mean you revert to using an IP address? Perhaps it is reverting to use localhost/socket? Are you able to connect via the command line using the FQDN?
psql -h FQDN openfiredb