Re: FTP Stuck in "PORT Command Successful"

Hello,

Am 12.04.2025 um 09:32 schrieb <konsult@xxxxxxxxxxxxxxx> <konsult@xxxxxxxxxxxxxxx>:

I have an FTP script that I have run hundreds of times that suddenly stopped
working.
It connects to the server. Login does work.
But when the "put" command executes nothing happens - it just sits there

"ftp> put anmalan.txt kamrat/anm278

200 PORT subcommand request successful"

Welcome to the wonderful world of firewalls and FTP.

FTP uses a separate TCP connection for data transfers, while the initial connection is only used as a control channel.

Something in between changed and now the data connection can't be established anymore: Most often this is a firewall issue somewhere.

https://www.ibm.com/support/pages/ftp-deeper-look-passive-file-transfer

Try the "quote pasv" command after login, to force passive mode to the server. If that doesn't fix the issue, consult with your firewall people.

See further explanation here:

https://archive.midrange.com/midrange-l/200208/msg00371.html

:wq! PoC