Canon EOS 5D Mark IV Instruction Manual page 77

Configuring FTP Server Connection Settings
Set the port number.
4
[Port number setting] should usually

be 00021.
Select [OK] and press <0> to go to

the next screen.
Set the passive mode setting.
5
Select [OK] and press <0> to go to

the next screen.
If an Error 41 ("Cannot connect to

FTP server") is displayed in step 9,
setting [Passive mode] to [Enable]
may resolve it.
Set the proxy server.
6
Select [OK] and press <0> to go to

the next screen.
Set the login method.
7
Select [OK] and press <0> to go to

the next screen.
77