I use duckdns to access Fritzbox 7490 which is working fine but can't ftp to it. Do I need to change any other settings somewhere? Looking at the activity in FileZilla looks like connections gets established but fails to retrieve the directory listing.
Status: Resolving address of khadanja.duckdns.org
Status: Connecting to xxx.xxx.xx.xxx: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...
Error: Connection timed out after 60 seconds of inactivity
Error: Failed to retrieve directory listing
Status: Disconnected from server
Status: Resolving address of khadanja.duckdns.org
Status: Connecting to xxx.xxx.xx.xxx: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 current directory.
Command: TYPE I
Response: 200 Type set to I.
Command: PASV
Response: 227 Entering Passive Mode (xxx,xxx,xx,xxx,208,10)
Command: LIST
Error: The data connection could not be established: ETIMEDOUT - Connection attempt timed out
Error: Connection timed out after 60 seconds of inactivity
Error: Failed to retrieve directory listing
Status: Disconnected from server
Status: Resolving address of khadanja.duckdns.org
Status: Connecting to xxx.xxx.xx.xxx: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 current directory.
Command: TYPE I
Response: 200 Type set to I.
Command: PASV
Response: 227 Entering Passive Mode (xxx,xxx,xx,xxx,159,200)
Command: LIST
Error: The data connection could not be established: ETIMEDOUT - Connection attempt timed out
Error: Connection timed out after 60 seconds of inactivity
Error: Failed to retrieve directory listing