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  3. May 2023

Re: How to do FTP using TN5250 Mochasoft

Hello Mark,

Am 29.05.2023 um 14:34 schrieb Mark Waterbury <mark.s.waterbury@xxxxxxxxxxxxx>:

IIRC, this happens quite often when using the command line FTP from a Windows system in a CMD.EXE (DOS) window ... the problem(s) usually have to do with the fact that the FTP protocol wants to establish a "back channel" for the data, so the FTP server you are talking to wants to connect back to your Windows PC, using a different (generated dynamic) port #, and this will often be blocked by firewalls.

Yes, but this back channel is used *after* authentication, when doing actual data transfers (ls, put, get).

Not sure if current Windows command line FTP meanwhile changed the default data channel establishment to "passive". I had explained the technical background in an earlier message to this list extensively.

:wq! PoC




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