Mostly likely the IP address has been blocked by the server firewall. Due to some activity of my FTP over the server or due to some failed login attempts. Which most likely cause my IP address to be blocked by server firewall.
I believe that it’s possible to change or getting new IP address by rebooting the home router.
some firewalls are set to block connections by IP after 3 invalid login attempts either into cPanel, ftp or email;
So better to adjust the Firezilla'ssetting as:
Site Manger ->
Transfer Setting ->
Limit number of simultaneous connections then set it to 3 instead of 10 by default it should fix your issue.
