220 FTP Server ready.
530 Login incorrect.
421 Service not available, closing control connection.
530 Not logged in.

HTTP/1.1 403 Forbidden
Content-Type: text/html; charset=iso-8859-1
Content-Length: 318
Connection: keep-alive
Keep-Alive: timeout=15
Date: Thu, 10 Oct 2024 13:23:17 GMT
Server: Apache

nginx

HTTP/1.1 400 Bad Request
Server: nginx
Date: Tue, 22 Oct 2024 13:39:10 GMT
Content-Type: text/html
Content-Length: 650
Connection: close