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 โ 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.
This is still very much an issue, that seems to have been forgotten by Cloudflare in the GitHub Issue https://github.com/cloudflare/cloudflared/issues/714