How to solve the problem with passive ftp?

Question

FTP

The problem is this:
Everything worked fine, the settings of the ftp client and router did not change. When I recently tried to access the ftp server hostenko came across the following problem:

Статус:         	Определение IP-адреса для k30.hostenko.com
Статус:         	Соединяюсь с 193.106.248.75:21...
Статус:         	Соединение установлено, ожидание приглашения...
Ответ:           	220-Welcome to hostenko.com FTP service.
Ответ:           	220-Unauthorized use of this system is prohibited.
Ответ:           	220 
Команда:      	USER fhydbaza61357
Ответ:           	331 Please specify the password.
Команда:      	PASS *************
Ответ:           	230 Login successful.
Команда:      	FEAT
Ответ:           	211-Features:
Ошибка:        	Превышено время ожидания соединения
Ошибка:        	Невозможно подключиться к серверу

Support said that the problem is on my side, that everything is fine with them. Advised to check the settings of the passive connection mode. What exactly needs to be checked, I still don’t understand, nothing has changed there and everything is in order, it seems. To other servers (ayola, let's say) the connection is successful. I tried to open port 21 on the router - it did not help. How to solve this problem, can anyone tell me? Or at least what it might be so that I can look for its solution myself?
upd. Passive mode enabled. I tried to share the Internet from the phone - everything was connected. Apparently, it's in the settings of the router. What router settings can be responsible for this?

Answer 1

Hello.
content_edit_pre ?

Answer 2

pre_post_update?