ModSecurity, sometimes called Modsec, is an open-source web application firewall. This integration allows you to send ModSecurity logs to your Layerlog SIEM account.

Configure Filebeat

Before you begin, you’ll need:

##### Download the Layerlog public certificate to your credentials server

For HTTPS shipping, download the Layerlog public certificate to your certificate authority folder.

sudo curl https://raw.githubusercontent.com/logzio/public-certificates/master/AAACertificateServices.crt --create-dirs -o /etc/pki/tls/certs/COMODORSADomainValidationSecureServerCA.crt
Configure Filebeat

Open the Filebeat configuration file (/etc/filebeat/filebeat.yml) with your preferred text editor. Copy and paste the code block below, overwriting the previous contents. (You want to replace the file’s contents with this code block.)

### Filebeat ###
filebeat.inputs:

- type: log
  paths:
    - /var/log/apache2/error.log
  fields:
    logzio_codec: json
    token: <<LOG-SHIPPING-TOKEN>>
    type: modsecurity
  fields_under_root: true
  encoding: utf-8
  ignore_older: 3h

#For version 6.x and lower
#filebeat.registry_file: /var/lib/filebeat/registry

# For version 7 and higher
filebeat.registry.path: /var/lib/filebeat

# The following processors are to ensure compatibility with version 7
processors:
- rename:
    fields:
     - from: "agent"
       to: "beat_agent"
    ignore_missing: true
- rename:
    fields:
     - from: "log.file.path"
       to: "source"
    ignore_missing: true

### Output ###
output:
  logstash:
    hosts: ["<<LISTENER-HOST>>:5015"]
    ssl:
      certificate_authorities: ['/etc/pki/tls/certs/COMODORSADomainValidationSecureServerCA.crt']

Replace the placeholders to match your specifics. (They are indicated by the double angle brackets << >>):

  • Replace <<LOG-SHIPPING-TOKEN>> with the token of the account you want to ship to.

  • Replace <<LISTENER-HOST>> with the host for your region. For example, listener.layerlog.com if your account is hosted on AWS US East, or listener-nl.layerlog.com if hosted on Azure West Europe.

One last validation - make sure Layerlog is the only output and appears only once. If the file has other outputs, remove them.

Start Filebeat

Start or restart Filebeat for the changes to take effect.

Check Layerlog for your logs

Give your logs some time to get from your system to ours, and then open Kibana.

If you still don’t see your logs, see log shipping troubleshooting.