Nginx limit connections & csf

as the nginx.conf comments suggest uncomment the relevant line http://nginx.org/en/docs/http/ngx_http_limit_conn_module.html#limit_conn_zone

from

Code:

## limit number of concurrency connections per ip to 16
## add to your server {} section the next line
## limit_conn limit_per_ip 16;
## uncomment below line allows 500K sessions
# limit_conn_log_level error;
#######################################
# use limit_zone for Nginx <v1.1.7 and lower
# limit_zone $binary_remote_addr zone=limit_per_ip:16m;
#######################################
# use limit_conn_zone for Nginx >v1.1.8 and higher
# limit_conn_zone $binary_remote_addr zone=limit_per_ip:16m;
#######################################

to

Code:

## limit number of concurrency connections per ip to 16
## add to your server {} section the next line
## limit_conn limit_per_ip 16;
## uncomment below line allows 500K sessions
# limit_conn_log_level error;
#######################################
# use limit_zone for Nginx <v1.1.7 and lower
# limit_zone $binary_remote_addr zone=limit_per_ip:16m;
#######################################
# use limit_conn_zone for Nginx >v1.1.8 and higher
limit_conn_zone $binary_remote_addr zone=limit_per_ip:16m;
#######################################

As to CSF that RESTRICT_SYSLOG option is mainly intended for shared hosting environments. As Centmin Mod is not intended for share hosting (FAQ 2 at http://centminmod.com/faq.html), it doesn't apply as oneself would be the only one accessing the server via SSH. So leaving RESTRICT_SYSLOG=0 and living with the *WARNING* RESTRICT_SYSLOG is disabled. message is fine.