Critical error: could not connect to server

Key Takeaways

• The article covers four possible causes and solutions of the error: incorrect server address or port number, firewall or antivirus blocking the connection, FTP server offline or unreachable, or invalid login credentials.
• The article provides step-by-step instructions on how to check and correct each of these factors using FileZilla and other tools.

Learn how to troubleshoot and fix the common FileZilla server connection error that occurs when trying to access FTP server from outside the network.

FileZilla is a popular FTP client that allows users to transfer files between their local computers and a remote server.

However, sometimes users may encounter the FileZilla server connection error that prevents them from accessing the FTP server from outside the network. This error can be caused by various factors, such as incorrect server address or port number, firewall or antivirus blocking the connection, FTP server offline or unreachable, or invalid login credentials.

In this article, we will explain how to fix the FileZilla server connecti

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