Collect VyOS logs

Supported in:

Google secops SIEM

This document explains how to ingest VyOS logs to Google Security Operations using Bindplane. The parser extracts fields from the syslog messages, primarily focusing on DHCP events. It uses grok patterns to identify and categorize messages based on the process (dhcpd, kernel, etc.), then maps relevant information to UDM fields, handling DHCP requests, acknowledgments, offers, and other event types differently. It also populates generic event details for non-DHCP logs and maps network connection information when available.

Before you begin

Make sure you have the following prerequisites:

Google SecOps instance
Windows 2016 or later or a Linux host with systemd
If running behind a proxy, ensure firewall ports are open
Privileged access to VyOS

Get Google SecOps ingestion authentication file

Sign in to the Google SecOps console.
Go to SIEM Settings > Collection Agents.
Download the Ingestion Authentication File. Save the file securely on the system where Bindplane will be installed.

Get Google SecOps customer ID

Sign in to the Google SecOps console.
Go to SIEM Settings > Profile.
Copy and save the Customer ID from the Organization Details section.

Install the Bindplane agent

Install the Bindplane agent on your Windows or Linux operating system according to the following instructions.

Windows installation

Open the Command Prompt or PowerShell as an administrator.

Run the following command:

msiexec /i "https://github.com/observIQ/bindplane-agent/releases/latest/download/observiq-otel-collector.msi" /quiet

Linux installation

Open a terminal with root or sudo privileges.

Run the following command:

sudo sh -c "$(curl -fsSlL https://github.com/observiq/bindplane-agent/releases/latest/download/install_unix.sh)" install_unix.sh

Additional installation resources

For additional installation options, consult the installation guide.

Configure the Bindplane agent to ingest Syslog and send to Google SecOps

Access the configuration file:
- Locate the config.yaml file. Typically, it's in the /etc/bindplane-agent/ directory on Linux or in the installation directory on Windows.
- Open the file using a text editor (for example, nano, vi, or Notepad).

Edit the config.yaml file as follows:

receivers:
    udplog:
        # Replace the port and IP address as required
        listen_address: "0.0.0.0:514"

exporters:
    chronicle/chronicle_w_labels:
        compression: gzip
        # Adjust the path to the credentials file you downloaded in Step 1
        creds_file_path: '/path/to/ingestion-authentication-file.json'
        # Replace with your actual customer ID from Step 2
        customer_id: <customer_id>
        endpoint: malachiteingestion-pa.googleapis.com
        # Add optional ingestion labels for better organization
        log_type: 'VYOS'
        raw_log_field: body
        ingestion_labels:

service:
    pipelines:
        logs/source0__chronicle_w_labels-0:
            receivers:
                - udplog
            exporters:
                - chronicle/chronicle_w_labels

Replace the port and IP address as required in your infrastructure.
Replace <customer_id> with the actual customer ID.
Update /path/to/ingestion-authentication-file.json to the path where the authentication file was saved in the Get Google SecOps ingestion authentication file section.

Restart the Bindplane agent to apply the changes

To restart the Bindplane agent in Linux, run the following command:
```
sudo systemctl restart bindplane-agent
```
To restart the Bindplane agent in Windows, you can either use the Services console or enter the following command:
```
net stop BindPlaneAgent && net start BindPlaneAgent
```

Configure Syslog on VyOS

Enter the following commands:

set system syslog marker interval 1200
set system syslog remote <bindplane-address> facility local0 level info port <bindolane-port> protocol <udp-or-tcp> format include-timezone

Make sure to replace the following fields with your details:
- <bindplane-address>: Enter the Bindplane agent IP address.
- <bindolane-port>: Enter the Bindplane agent port number (for example, 514).
- <udp-or-tcp>: Enter either UDP or TCP, depending on your Bindplane configuration (for example, UDP).

UDM Mapping Table

Log Field	UDM Mapping	Logic
`clientIp`	`principal.ip`	Client IP address extracted from the DHCP message.
`clientMac`	`principal.mac`	Client MAC address extracted from the DHCP message.
`datetime`	`metadata.event_timestamp`	The timestamp extracted from the log message.
`dst_ipaddress`	`target.ip`	Destination IP address extracted from the log message.
`hostname`	`observer.hostname`	Hostname extracted from the log message. Determined by the parser based on the `process` and other fields. Can be `GENERIC_EVENT`, `NETWORK_CONNECTION`, `NETWORK_DHCP`, or `STATUS_UPDATE`. Hardcoded to "VYOS".
`msg`	`metadata.description`	The original message from the log, or a portion of it, depending on the parsing logic. Set to "DHCP Event" if the `process` is "dhcpd". Hardcoded to "VYOS DHCP". Hardcoded to "VYOS".
`network.dhcp.chaddr`	`network.dhcp.chaddr`	Client MAC address extracted from DHCP messages.
`network.dhcp.ciaddr`	`network.dhcp.ciaddr`	Client IP address in a DHCPREQUEST message. DHCP message opcode. Set to "BOOTREQUEST" for DHCPREQUEST and DHCPINFORM, "BOOTREPLY" for DHCPACK and DHCPNAK. DHCP message type. Derived from `eventType` and can be `REQUEST`, `ACK`, `INFORM`, `NAK`, or `OFFER`.
`network.dhcp.yiaddr`	`network.dhcp.yiaddr`	Your (client) IP address in a DHCPACK or DHCPOFFER message. Set to "DHCP" if the `process` is "dhcpd".
`pri_host`	`principal.hostname`	Hostname associated with a client in DHCP messages.
`rem_msg`	`metadata.description`	Remaining part of the message after initial parsing, used for description in some cases.
`src_ipaddress`	`principal.ip`	Source IP address extracted from the log message.
`timestamp`	`event.timestamp`	The timestamp of the log entry.

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