BACKUP FAILURE TO FTP SERVER

[Effervescence]

The backup for a 4SC 3CX pro edition failed with the error shown on the attached screenshot. What is the cause and remedy?

 

[bitn2]

The backup for a 4SC 3CX pro edition failed with the error shown on the attached screenshot. What is the cause and remedy?

Its a problem with your ftp server... Its an active or passive connection?

 

[Effervescence]

Its a problem with your ftp server... Its an active or passive connection?

Active connection

 

[bitn2]

Active connection

Try passive and test again

 

[Effervescence]

Try passive and test again

what is the cause?

 

[bitn2]

what is the cause?

The 425 error means that the data channel is blocked or closed between you and the server you are trying to connect to.

• For Active (PORT) connections open port 21. Also open inbound high ports above 1024 to the client. You can specify the range of ports the client uses for an Active data connection by clicking Tools, Options, Firewall, and check "Limit local port range". Open the matching port range you specify in your firewall.​
• For Passive (PASV) connections open port 21, and disable any outbound packet or command filtering.​

If you still cannot get a successful connection, check all devices that are between the client and server to ensure that the proper ports are open (e.g. routers).

 

[Effervescence]

The 425 error means that the data channel is blocked or closed between you and the server you are trying to connect to.

• For Active (PORT) connections open port 21. Also open inbound high ports above 1024 to the client. You can specify the range of ports the client uses for an Active data connection by clicking Tools, Options, Firewall, and check "Limit local port range". Open the matching port range you specify in your firewall.​
• For Passive (PASV) connections open port 21, and disable any outbound packet or command filtering.​

If you still cannot get a successful connection, check all devices that are between the client and server to ensure that the proper ports are open (e.g. routers).

Thanks. This is understood. However, I retried the backup and it worked without any change. Maybe it was just a temporary error.