Cisco ASA is a security device that combines firewall, antivirus, intrusion prevention, and virtual private network (VPN) capabilities.

Configuration

Before you begin, you’ll need: Root access to a server running either Filebeat 7 or Filebeat 6, with port 6514 open for incoming traffic and 5015 open for outgoing traffic

Configure Cisco ASA Server logging

Configure your Cisco ASA firewall to send logs to your Filebeat server. Make sure you meet this configuration:

  • Log format: syslog
  • Send over: TCP
  • IP address: Filebeat server IP address
  • Port 6514

See Cisco docs for more information on configuring your Cisco ASA firewall.

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
Add TCP traffic as an input

In the Filebeat configuration file (/etc/filebeat/filebeat.yml), add TCP to the filebeat.inputs section.

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

# ...
filebeat.inputs:
- type: tcp
  max_message_size: 10MiB
  host: "0.0.0.0:6514"

  fields:
    logzio_codec: plain

    # Your Layerlog account token. You can find your token at
    #  http://panel.layerlog.com/#/dashboard/settings/manage-accounts
    token: <<LOG-SHIPPING-TOKEN>>
    type: cisco-asa
  fields_under_root: true
  encoding: utf-8
  ignore_older: 3h

If you’re running Filebeat 7, paste this code block. Otherwise, you can leave it out.

# ... For Filebeat 7 only ...
filebeat.registry.path: /var/lib/filebeat
processors:
- rename:
    fields:
    - from: "agent"
      to: "filebeat_agent"
    ignore_missing: true
- rename:
    fields:
    - from: "log.file.path"
      to: "source"
    ignore_missing: true

If you’re running Filebeat 6, paste this code block.

# ... For Filebeat 6 only ...
registry_file: /var/lib/filebeat/registry
Set Layerlog as the output

If Layerlog is not an output, add it now. (Remove all other outputs - there should only be 1 output in the configuration file.)

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.

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