Passive FTP Issues

Some common errors occur when entering passive mode in FTP. Most commonly, a failure to connect to the server results in a timeout with a log similar to this:

Status: Resolving address of $ftp-host
Status: Connecting to $ip-address:21...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Status: Logged in
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is your current location
Command: TYPE I
Response: 200 TYPE is now 8-bit binary
Command: PASV
Response: 227 Entering Passive Mode ($ip-address)
Command: MLSD
Error: Connection timed out after 10 seconds of inactivity
Error: Failed to retrieve directory listing

Workarounds

The following are the most common issues with entering passive mode:

• FTP Passive ports:

FTP fails with timeout error when entering passive mode due to closed ports

• ForcePassiveIP/MasqueradeAddress:

FTP fails entering passive mode due to incorrect Passive Mode IP

Resources

You can find more great information about passive FTP at How to Enable FTP Passive Mode