is there anyone who is using FTP/FTPS (FTP over SSL) via cloudflared/tunnel? I am struggling with data corruption during binary file transfers.
The tunnel is working fine for other protocols, but files transferred via FTP in passive mode are being corrupted – incomplete. Happens usually for files larger than 2 MB at the end of the transfer. Not deterministic, the same file is sometimes transferred correctly and sometimes corrupted. Not rare, occurs in like half of the cases.
I have tried multiple cloudflared hosts (linux/Windows), multiple target FTP servers (Linux/Windows), networks and multiple clients (Total commander, WinSCP, FileZilla). All of them have the same issue.
The client is using WARP Zero Trust to access the tunnel. I have tried multiple versions of cloudflared (including latest January release) and multiple versions of WARP and nothing is transferring the files correctly.