Most importantly, the errors do not stay in error_log, when they can be solved.
In access_log:
<ip_zabbix_server> - - [08/Jan/2020:17:50:28 -0300] "HEAD / HTTP/1.1" 403 -
In error_log:
[Wed Jan 08 17:50:28.893050 2020] [access_compat:error] [pid 27447:tid 139970702440192] [client <ip_zabbix_server>:39358] AH01797: client denied by server configuration: /srv/httpd/htdocs/
In this case, the best way to fix the problem would be to leave, in httpd.conf, the part about /srv/httpd/htdocs, under 'Require all denied', the line 'Require ip <ip from zabbix server>'? I believe I could even line up Require all denied.
In access_log:
<ip_zabbix_server> - - [08/Jan/2020:17:50:28 -0300] "HEAD / HTTP/1.1" 403 -
In error_log:
[Wed Jan 08 17:50:28.893050 2020] [access_compat:error] [pid 27447:tid 139970702440192] [client <ip_zabbix_server>:39358] AH01797: client denied by server configuration: /srv/httpd/htdocs/
In this case, the best way to fix the problem would be to leave, in httpd.conf, the part about /srv/httpd/htdocs, under 'Require all denied', the line 'Require ip <ip from zabbix server>'? I believe I could even line up Require all denied.