Solution for FileZilla 425 Unable to connect to FTP (Alibaba Cloud Server)

Alibaba Cloud Server cannot connect to FTP

FileZilla 425 Can't open data connection appears. Unable to connect to FTP

first step:

Enable passive mode in filezilla and set the port range, e.g. 1/1

Step 2:

Add a security group in the Alibaba Cloud Server console

First, add the port range you just set for passive mode, for example 1/1

Then add the FTP port, which is usually 21. If it is not correct, you can check it.

Note that it is in the direction of

Then you can connect successfully

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