Your comments

Hmm looks like it's relying on zone being defined before being used. In this case, remove your nginx.custom.d file and instead paste the zone definition into Website > Advanced > Custom top-level configuration.
Just paste this line only (limit_req_zone $binary_remote_addr zone=one:10m rate=1r/s;) in your nginx.custom.d/limits.conf file.


See the include directives in /etc/nginx/nginx.conf for more info.
It's ajenti.org.

------------------------------------------------------------
» nslookup ajenti.org
Non-authoritative answer:
Name: ajenti.org
Address: 109.239.49.179
1. В примере показан только необходимый минимум (location и bodysize) - скорее всего конфиг будут вставлять в конфиг уже существующего сайта (типичный юзкейс - https://abc.com/admin/ajenti)
2. Нет никакого смысла в SSL между nginx и ajenti.
That's not what DNS is for. OP needs to set up a reverse proxy vhost on their webserver. See http://support.ajenti.org/topic/472359-ajenti-behind-apache/ or http://support.ajenti.org/topic/349870-ajenti-behind-nginx/
Unfortunately, Ajenti V only supports a single PHP-FPM installation.