The server is connected through / via NAT. The only issue I have with the fail2ban possibilities is that the new domain / site is under the same account as the one that works (is live). That FTP client is set-up precisely as the new domain and accesses perfectly with SSH File Transfer or FTP.
Not sure that it matters anyway. I have checked bind...online perfectly...all servers using the ISPConfig "Monitor" are online. In the ISPConfig database, all websites (domains) are listed precisely, yet ISPConfig file system doesn't at all.
It may be time to consider another reliable control panel option. Any recommendations on a stable and less finicky open source control panel?