Feature #11612: The default mode of Net::FTP should be passive

• Status: Closed
• Assignee: shugo (Shugo Maeda)
• Target version: -

[shugo (Shugo Maeda)]

The default mode of Net::FTP is active for historical reasons, but it should be changed to passive
because active data connections might be blocked by a local firewall.
Passive data connections might also be blocked by a firewall, but such cases are relatively rare.

In Python, the default mode was changed to passive since Python 2.1.
In Perl, the default mode was changed to passive since libnet-1.21.

One concern is backward compatibility. For example the following code in open-uri.rb wouldn't work
if the default mode is changed.

ftp.passive = true if !options[:ftp_active_mode]

The code has to be changed as follows:

ftp.passive = !options[:ftp_active_mode]

It might be better to check the environment variable FTP_PASSIVE as Perl does.

Any thoughts?

[shugo (Shugo Maeda)]

• Status changed from Open to Closed

The default mode was changed in r52532.