Create an Agent Based Log Source - NGINX

Topics Discussed

You can use this document to send NGINX logs to Armor's Security Information & Event Management (SIEM).

Configure Your NGINX Service

Configuring Apache services uses the Command Line Interface (CLI) feature. For more information, see Security Service CLI Commands.

The following arguments are possible parameters for the Logging CLI feature. This allows customers to manage filebeat modules on Virtual Machines.

Command	Arguments	Result
nginx-enable		Enables filebeat IIS/apache/nginx. When run, module yml file will change from disabled state to enable state.
nginx- disable		Disables Filebeat IIS/apache/nginx. When run the module yml file will change from enable state to disable mode.
nginx-add-access-paths	path1, path2, path3	Includes the argument paths in module yml file under the 'access_paths' section.
nginx-remove-access-paths	path1, path2, path3	Removes the argument paths in module yml file under the 'access_paths' section.
nginx-add-error-paths	path1, path2, path3	Includes the argument paths in module yml file under the 'error_paths' section.
nginx-remove-error-paths	path1, path2, path3	Removes the argument paths in module yml file under the 'error_paths' section. Removes the argument paths in module yml file under the 'error_paths' section.
nginx-sync-config		The command sync the module yml file on vm with latest changes which are required.
nginx-describe-config		The command displays current access & error paths which are configured in module yml file.

Command Usage:

armor logging nginx-enable

armor logging nginx-disable

armor logging nginx-add-access-paths <required paths needs to add here>

armor logging nginx-remove-access-paths <required paths needs to add here>

armor logging nginx-add-error-paths <required paths needs to add here>

armor logging nginx-remove-error-paths <required paths needs to add here>

armor logging nginx-sync-config

armor logging nginx-describe-config

Additional Information

NGINX will need configuration for a specific log format. This is normally done in the nginx.conf file. Documentation for the ngx_http_log_module can be found at http://nginx.org/en/docs/http/ngx_http_log_module.html

Configure Log Format Directive NGINX Docs

log_format armor_202004 'LEEF:1.0|NGINX|NGINX|$nginx_version|$status|'
'devTime=$time_local\t'
'devTimeFormat=dd/MMM/yyyy:HH:mm:ss Z\t'
'src=$remote_addr\t'
'dst=$server_addr\t'
'dstPort=$server_port\t'
'proto=$server_protocol\t'
'usrName=$remote_user\t'
'request=$request\t'
'body_bytes_sent=$body_bytes_sent\t'
'http_referer=$http_referer\t'
'http_true_client_ip=$http_true_client_ip\t'
'http_user_agent=$http_user_agent\t'
'http_x_header=$http_x_header\t'
'http_x_forwarded_for=$http_x_forwarded_for\t'
'request_time=$request_time\t'
'upstream_response_time=$upstream_response_time\t'
'pipe=$pipe\t'
'uri_query=$query_string\t'
'uri_path=$uri\t'
'cookie=$http_cookie';

Configure Access Log Directive NGINX Docs

access_log /var/log/nginx/access.log armor_202004;

Configure Access Log Directive will create a filename that is then used with the command:

armor logging nginx-add-access-paths

Full Example

http {
log_format armor_202004 'LEEF:1.0|NGINX|NGINX|$nginx_version|$status|'
'devTime=$time_local\t'
'devTimeFormat=dd/MMM/yyyy:HH:mm:ss Z\t'
'src=$remote_addr\t'
'dst=$server_addr\t'
'dstPort=$server_port\t'
'proto=$server_protocol\t'
'usrName=$remote_user\t'
'request=$request\t'
'body_bytes_sent=$body_bytes_sent\t'
'http_referer=$http_referer\t'
'http_true_client_ip=$http_true_client_ip\t'
'http_user_agent=$http_user_agent\t'
'http_x_header=$http_x_header\t'
'http_x_forwarded_for=$http_x_forwarded_for\t'
'request_time=$request_time\t'
'upstream_response_time=$upstream_response_time\t'
'pipe=$pipe\t'
'uri_query=$query_string\t'
'uri_path=$uri\t'
'cookie=$http_cookie';
access_log /var/log/nginx/access.log armor_202004;

Troubleshooting

Verify that logs are formatted correctly, similar to the following examples:

LEEF:1.0|NGINX|NGINX|1.16.1|404|devTime=17/Apr/2020:13:15:58 +0000 devTimeFormat=dd/MMM/yyyy:HH:mm:ssZ src=198.51.100.20 dst=192.0.2.0 dstPort=80 proto=HTTP/1.1 usrName=- request=GET /nginx-logo.pn HTTP/1.1 body_bytes_sent=3665 http_referer=http://203.0.113.30/ http_true_client_ip=- http_user_agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/198.51.100.100 Safari/537.36 http_x_header=- http_x_forwarded_for=- request_time=0.000 upstream_response_time=- pipe=. uri_query=- uri_path=/404.html cookie=-

LEEF:1.0|NGINX|NGINX|1.16.1|200|devTime=22/Apr/2020:13:06:50 +0000 devTimeFormat=dd/MMM/yyyy:HH:mm:ss Z src=203.0.113.20 dst=192.0.2.0 dstPort=80 proto=HTTP/1.1 usrName=- request=GET http://[::ffff:a9fe:a9fe]/ HTTP/1.1 body_bytes_sent=1580 http_referer=- http_true_client_ip=- http_user_agent=AWS Security Scanner http_x_header=- http_x_forwarded_for=- request_time=0.000 upstream_response_time=0.000 pipe=. uri_query=- uri_path=/ cookie=-