При подключении по ftp к example.com происходит сбой перед запросом пароля для более длинной строки:
user@client:~> ftp example.com
Connected to example.com.
220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
220-You are user number 2 of 50 allowed.
220-Local time is now 17:56. Server port: 21.
220-This is a private system - No anonymous login
220-IPv6 connections are also welcome on this server.
220 You will be disconnected after 15 minutes of inactivity.
Name (client:username): ftpusername@example.com
421 Service not available, remote server has closed connection.
ftp: Login failed.
Но если я попытаюсь войти в систему с меньшей строкой:
user@client:~> ftp example.com
Connected to example.com.
220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
220-You are user number 2 of 50 allowed.
220-Local time is now 17:58. Server port: 21.
220-This is a private system - No anonymous login
220-IPv6 connections are also welcome on this server.
220 You will be disconnected after 15 minutes of inactivity.
Name (client:username): f@example.com
331 User f@example.com OK. Password required
Password:
Что здесь может быть не так?