Fujitsu ScanSnap N1800 Operator's Manual page 122

ATTENTION
If the admin connection settings are changed using the Admin Tool, the Admin Tool is
disconnected from the scanner.
To continue with other settings, try reconnecting to the scanner with the new settings.
If SSL is enabled, SSL is also used for communication between the Central Admin Server
and the scanner. When Central Admin is enabled, change the settings on the Central Admin
Console [Scanner Central Admin Server Settings] window.
The following settings combinations are not possible.
Port Number "80" and SSL [On]
Port Number "443" and SSL [Off]
4.8 Configuring the Network Settings
122