Error accessing box with FTP

I'm trying to use the MATLAB ftp functionality to access files on my box account. I usuallly deal with my box files manually via the box web platform or through FileZilla, both without issue. However, I'm now trying to automate this process with Matlab and have seemingly fallen at the first hurdle.

Going by the MATLAB ftp documentation I unsuccessfully tried to set up a ftp object for my box address:

>>ftpobj = ftp("ftp.box.com",myUname, myPassword);

Error using matlab.io.ftp.FTP (line 175)
Connection refused for "ftp://ftp.box.com".

Error in ftp (line 63)
h = matlab.io.ftp.FTP(host, varargin{:});

Error in NotForGithub (line 8)
ftpobj = ftp("ftp.box.com",myUname, myPassword);

After some searching I found that r2021b had an FTP error at some point (link), but trying their example I found that wasn't the problem in my case:

>> ftpobj = ftp("ftp.ngdc.noaa.gov")
FTP with properties:

Host: "ftp.ngdc.noaa.gov"
Username: "anonymous"
Port: 21
ServerLocale: "en_US"
DirParserFcn: @matlab.io.ftp.parseDirListingForUnix
Mode: "binary"
LocalDataConnectionMethod: "passive"
RemoteWorkingDirectory: "/"

I similarly tried to access box without giving my details (in case there was a problem there specifically) and still got the following issue:

>> ftpobj = ftp("ftp.box.com")
Error using matlab.io.ftp.FTP (line 175)
Connection refused for "ftp://ftp.box.com".

Error in ftp (line 63)
h = matlab.io.ftp.FTP(host, varargin{:});

I've also seen people talk about the "SSH/SFTP/SCP for Matlab (v2)" (link), but it was not clear to me at all how I'd apply that to wat I'm trying to do, so if that is the solution and you have any tips on how I can use it - please let me know! Thanks

EDIT: I updated Matlab today (20th December 2021) and the problem persists

Answer 1

[Becky Heath]

This answer comes from a suggestion I got from my stack overflow question asking the same thing (link).

It turns out my box acount required FTPS so normal FTP would not be permitted. Using the following instead worked perfectly!

ftpobj = ftp("ftp.box.com",myUname, myPassword,'TLSMode','strict');

[Dimitrios Poulos]

Error using ftp>parseInputs (line 141)

'TLSMode' is not a recognized parameter. For a list of valid name-value pair arguments, see the documentation for this function.