Re: FTP commands issue

Hello Mark,

Am 14.02.2024 um 05:19 schrieb mlazarus <mlazarus@xxxxxxxxxxxx>:

Thanks for the analysis and info. I switched to Filezilla and am now able to do the transfer. Does that tell you anything about what may have blocked the Windows client? Passive mode? Is passive mode configured on the i?

Your problem is twofold:
- The standard Windows ftp client does not support passive mode — at least to my understanding. Forcing the server to negotiate a passive data connection ("quot") did not help as you've experienced.
- Probably your local Windows Firewall prohibited the incoming connection from the FTP server in active mode on your first try.

Passive mode is negotiated ephemeral per session. Both the server and client must support passive mode. That the Windows FTP client does not is an anachronism. Windows not having an exception in the Firewall for the FTP client itself is another case of bad vendor defaults.

You might want to learn some basics about FTP to gain a better understanding what's going on:

https://en.wikipedia.org/wiki/File_Transfer_Protocol

:wq! PoC