Problem with FTP

I installed comodo firewall and now my ftp program (filezilla) cannot upload files anymore.
The files are uploaded but empty (0 bytes)

If I adjust the security set to “Allow All” (bypass comodo) filezilla works fine, so the problem is comodo.

Any help please?

Thank You.

I have had the exact same experience. It’s the reason I cannot recommend Comodo.

Hallo John,
please check Firezilla Firewall settings and enable Passive Mode