A comprehensive framework for parsing, interpreting, and analyzing Cisco ASA firewall syslog messages for security and network troubleshooting.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install cisco-asa-syslog
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install cisco-asa-syslog using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Cisco ASA Syslog Analysis?
The Cisco ASA Syslog Analysis skill is designed to bridge the gap between raw firewall logs and actionable security intelligence. By leveraging Openclaw Skills, users can decode the specific message formats used by Cisco Adaptive Security Appliances, whether they follow the traditional RFC 3164 or the modern RFC 5424 standards. This skill provides the logical foundation to transform cryptic syslog streams into structured data that reveals network traffic patterns, VPN status, and potential security threats.
Understanding ASA logs is essential for any network administrator or security analyst. This skill simplifies the complexity of PRI values, facility codes, and the unique 6-digit ASA message ID system, enabling faster incident response and more accurate firewall auditing. Integrating this logic into your Openclaw Skills workflow ensures that you can handle everything from routine connection tracking to critical hardware alerts with precision.
Cisco ASA Syslog Analysis Use Cases
- Investigating unauthorized access attempts or denied traffic via ACL logs.
- Monitoring VPN tunnel health and user authentication lifecycles.
- Automating the detection of firewall hardware failures or failover events.
- Correlating connection build and teardown events to map network traffic flows.
- Performing security audits by parsing 6-digit message IDs into functional categories.
How Cisco ASA Syslog Analysis Works
- Detect the syslog transport protocol version to properly align the header parsing logic.
- Calculate the severity and facility codes from the PRI value to determine the priority of the event.
- Extract the core ASA message components, including the severity digit and the unique 6-digit message identifier.
- Map the first three digits of the message ID to a specific functional category, such as VPN, Firewall, or System.
- Tokenize the message text to capture variable data like source/destination IPs, interface names, and connection IDs.
- Compare the event against known patterns, such as paired build and teardown logs, to understand the full session lifecycle.
Cisco ASA Syslog Analysis Setup
To implement this skill within your environment, ensure your Cisco ASA is configured to send logs to your collector using the following CLI commands:
# Enable logging and set the host
logging enable
logging host <interface_name> <ip_address>
# (Optional) Enable RFC 5424 high-precision timestamps
logging timestamp rfc5424
# Set logging level (e.g., informational)
logging trap 6
You can then use the following regex pattern in your Openclaw Skills integration to parse incoming logs:
^%ASA-(?P<severity>\d)-(?P<message_id>\d{6}):\s+(?P<message_text>.+)$
Cisco ASA Syslog Analysis Data Schema & Taxonomy
The skill organizes log data into a structured format based on the following taxonomy:
| Field | Type | Description |
|---|---|---|
| severity | Integer | Syslog severity levels 0 (Emergency) through 7 (Debug) |
| message_id | String | 6-digit unique identifier (e.g., 302013) |
| category | String | Derived from the first 3 digits (e.g., 3xxxxx = Firewall/NAT) |
| interface | String | Contextual interface name (inside, outside, dmz) |
| metadata | Object | Variable tokens like src_ip, dst_port, and protocol |
Cisco ASA Syslog Analysis Advanced Features
- Support for multi-interface awareness to provide network direction context for every event.
- Logic for tracking paired messages, such as matching connection 'Built' (302013) with 'Teardown' (302014) events.
- RFC 5424 structured data support for newer ASA versions (9.10+) utilizing ISO 8601 timestamps.
- Categorization mapping for all eight major ASA functional areas, from VPN crypto to application inspection.
SKILL.md
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