I faced a problem with my FTP (Filezilla) while tried to login to my site.
Response: 530 Login authentication failed
Error: Critical error: Could not connect to server
How I solved the issue?
If you are using Filezilla, go to “Network Configuration wizard” under Edit menu.
The test result was:
Connecting to probe.filezilla-project.org
Response: 220 FZ router and firewall tester ready
Response: 331 Give any password.
Response: 230 logged on.
Checking for correct external IP address
IP 10.0.0.2 ba-a-a-c
Response: 510 Mismatch. Your IP is 188.8.131.52, bbh-cab-cfc-cca
Wrong external IP address
After 2/3 steps, choose the option “Get External IP address from the following URL. By default, it is http://ip.filezilla-project.org/ip.php
Then click Next. Hope the new external IP solves the error. It worked for me.
Also use ftp ahead of the sitename. For eg: use ftp.wayanad.net instead of wayanad.net
This error is caused by the IP address banning by your web server. So you must ‘whitelist’ your IP address in your webserver at the earliest.