Canon WFT-R10 Advanced User's Manual page 130

Passive Mode
This setting is configured in [FTP server] - [Passive mode].
Enable this setting for a network environment protected by a firewall. If an Error 41 occurs
(Cannot connect to FTP server), setting passive mode to [Enable] may enable access to
the FTP server.
Trusting a Destination Server
Set in [Trust target server] in [FTP server].
Set it to [Enable] if you want to connect to the FTP server even if the connection destination
server cannot be trusted with the root certificate that is used. If you select this setting, be
careful with security.
130