Ange-ftp: passive mode transfers?

[Lord Emsworth]

Hi all,

I regularly use Emacs to access remote files. Everything was working 
fine. However, recently, some of our computers (including mine) were put 
behind a firewall, while some weren't (including those on which I used 
to access files).

Ange-ftp no longer works for data transfer (though it works fine with 
control commands). This is because of the firewall. Is there any 
setting/configuration I can change to enable passive data transfers with 
Ange-ftp?

Regards,
Emsworth


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