https://github.com/solomonneas/zeek-mcp

MCP server for Zeek network analysis framework — intelligent log parsing, querying, and security analysis
https://github.com/solomonneas/zeek-mcp
ai-agents mcp model-context-protocol network-analysis security traffic-analysis zeek
Last synced: 3 months ago
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MCP server for Zeek network analysis framework — intelligent log parsing, querying, and security analysis
Host: GitHub
URL: https://github.com/solomonneas/zeek-mcp
Owner: solomonneas
License: mit
Created: 2026-02-07T18:55:43.000Z (5 months ago)
Default Branch: main
Last Pushed: 2026-04-20T22:55:35.000Z (3 months ago)
Last Synced: 2026-04-21T00:39:00.820Z (3 months ago)
Topics: ai-agents, mcp, model-context-protocol, network-analysis, security, traffic-analysis, zeek
Language: TypeScript
Size: 171 KB
Stars: 0
Watchers: 0
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
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README

          # Zeek MCP Server

[![TypeScript](https://img.shields.io/badge/TypeScript-5.7-blue?logo=typescript)](https://www.typescriptlang.org/)

[![Node.js](https://img.shields.io/badge/Node.js-20%2B-green?logo=node.js)](https://nodejs.org/)

[![MCP](https://img.shields.io/badge/MCP-1.x-purple)](https://modelcontextprotocol.io/)

[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)

An MCP (Model Context Protocol) server for [Zeek](https://zeek.org/) and [Suricata](https://suricata.io/), providing intelligent log parsing, querying, and analysis over network security monitoring data. Enables LLMs to query connection logs, DNS activity, HTTP requests, SSL certificates, file extractions, security notices, IDS alerts, and cross-reference findings between both sensors.

## Features

- **25 tools** for querying and analyzing Zeek + Suricata logs

- **2 resources** for log type metadata and sensor stats

- **4 prompts** for guided investigation workflows

- **Dual format support** - JSON and TSV (Zeek's native tab-separated format)

- **Suricata integration** - Query eve.json alerts, cross-correlate with Zeek, engine stats

- **CIDR matching** - Filter by IP ranges (10.0.0.0/8, 192.168.1.0/24)

- **IPv6 support** - Full IPv6 CIDR matching

- **Wildcard matching** - Search domains and URIs with patterns (*.evil.com)

- **Beaconing detection** - Statistical C2 beacon analysis with jitter scoring

- **Anomaly detection** - Port scan, data exfiltration, and unusual port detection

- **DNS tunneling detection** - Shannon entropy analysis with encoding detection

- **DHCP asset mapping** - MAC-to-IP/hostname device inventory

- **Compressed log support** - Reads .gz archived logs

- **Date-based rotation** - Navigates Zeek's archived log directories by date

## Prerequisites

- Node.js 20+

- Zeek sensor generating logs (JSON or TSV format)

- Suricata (optional, for IDS alert correlation)

## Installation

```bash

git clone https://github.com/solomonneas/zeek-mcp.git

cd zeek-mcp

npm install

npm run build

```

## Configuration

### Zeek

| Variable | Default | Description |

|----------|---------|-------------|

| `ZEEK_LOG_DIR` | `/opt/zeek/logs/current` | Path to current Zeek logs |

| `ZEEK_LOG_ARCHIVE` | `/opt/zeek/logs` | Path to archived/rotated logs |

| `ZEEK_LOG_FORMAT` | `json` | Log format: `json` or `tsv` |

| `ZEEK_MAX_RESULTS` | `1000` | Maximum results per query |

### Suricata

| Variable | Default | Description |

|----------|---------|-------------|

| `SURICATA_EVE_LOG` | `/opt/nids/suricata/logs/eve.json` | Path to Suricata eve.json |

| `SURICATA_FAST_LOG` | `/opt/nids/suricata/logs/fast.log` | Path to Suricata fast.log |

| `SURICATA_RULES_DIR` | `/opt/nids/suricata/rules` | Path to Suricata rules directory |

## Usage

### Claude Desktop

Add to `~/Library/Application Support/Claude/claude_desktop_config.json` (macOS) or `%APPDATA%\Claude\claude_desktop_config.json` (Windows):

```json

{

  "mcpServers": {

    "zeek": {

      "command": "zeek-mcp",

      "env": {

        "ZEEK_LOG_DIR": "/opt/nids/zeek/logs",

        "ZEEK_LOG_FORMAT": "tsv",

        "SURICATA_EVE_LOG": "/opt/nids/suricata/logs/eve.json"

      }

    }

  }

}

```

### Claude Code

```bash

claude mcp add zeek \

  --env ZEEK_LOG_DIR=/opt/nids/zeek/logs \

  --env ZEEK_LOG_FORMAT=tsv \

  --env SURICATA_EVE_LOG=/opt/nids/suricata/logs/eve.json \

  -- zeek-mcp

```

Add `--scope user` to make it available from any directory instead of only the current project.

### OpenClaw

If you're running from a source checkout instead of the npm-installed binary, point `command`/`args` at the built `dist/index.js`:

```bash

openclaw mcp set zeek '{

  "command": "node",

  "args": ["/absolute/path/to/zeek-mcp/dist/index.js"],

  "env": {

    "ZEEK_LOG_DIR": "/opt/nids/zeek/logs",

    "ZEEK_LOG_FORMAT": "tsv",

    "SURICATA_EVE_LOG": "/opt/nids/suricata/logs/eve.json"

  }

}'

```

Or, with the global npm install:

```bash

openclaw mcp set zeek '{

  "command": "zeek-mcp",

  "env": {

    "ZEEK_LOG_DIR": "/opt/nids/zeek/logs",

    "ZEEK_LOG_FORMAT": "tsv",

    "SURICATA_EVE_LOG": "/opt/nids/suricata/logs/eve.json"

  }

}'

```

Then restart the OpenClaw gateway so the new server is picked up:

```bash

systemctl --user restart openclaw-gateway

openclaw mcp list   # confirm "zeek" is registered

```

### Hermes Agent

[Hermes Agent](https://github.com/NousResearch/hermes-agent) reads MCP config from `~/.hermes/config.yaml` under the `mcp_servers` key. Add an entry:

```yaml

mcp_servers:

  zeek:

    command: "zeek-mcp"

    env:

      ZEEK_LOG_DIR: "/opt/nids/zeek/logs"

      ZEEK_LOG_FORMAT: "tsv"

      SURICATA_EVE_LOG: "/opt/nids/suricata/logs/eve.json"

```

Or, when running from a source checkout instead of the global npm install:

```yaml

mcp_servers:

  zeek:

    command: "node"

    args: ["/absolute/path/to/zeek-mcp/dist/index.js"]

    env:

      ZEEK_LOG_DIR: "/opt/nids/zeek/logs"

      ZEEK_LOG_FORMAT: "tsv"

      SURICATA_EVE_LOG: "/opt/nids/suricata/logs/eve.json"

```

Then reload MCP from inside a Hermes session:

```

/reload-mcp

```

### Codex CLI

[Codex CLI](https://github.com/openai/codex) registers MCP servers via `codex mcp add`:

```bash

codex mcp add zeek \

  --env ZEEK_LOG_DIR=/opt/nids/zeek/logs \

  --env ZEEK_LOG_FORMAT=tsv \

  --env SURICATA_EVE_LOG=/opt/nids/suricata/logs/eve.json \

  -- zeek-mcp

```

Or, when running from a source checkout:

```bash

codex mcp add zeek \

  --env ZEEK_LOG_DIR=/opt/nids/zeek/logs \

  --env ZEEK_LOG_FORMAT=tsv \

  --env SURICATA_EVE_LOG=/opt/nids/suricata/logs/eve.json \

  -- node /absolute/path/to/zeek-mcp/dist/index.js

```

Codex writes the entry to `~/.codex/config.toml` under `[mcp_servers.zeek]`. Verify with:

```bash

codex mcp list

```

### Standalone

```bash

ZEEK_LOG_DIR=/opt/nids/zeek/logs ZEEK_LOG_FORMAT=tsv node dist/index.js

```

### Development

```bash

ZEEK_LOG_DIR=./test-data npm run dev

```

## Tools

### Connection Analysis

| Tool | Description |

|------|-------------|

| `zeek_query_connections` | Search connection logs with flexible filters (CIDR, protocol, duration, bytes) |

| `zeek_connection_summary` | Statistical summary: top talkers, services, bytes, connection counts |

| `zeek_long_connections` | Find long-lived connections (potential C2 beacons, tunnels) |

### DNS Analysis

| Tool | Description |

|------|-------------|

| `zeek_query_dns` | Search DNS queries with domain wildcards and response code filtering |

| `zeek_dns_summary` | Top domains, NXDOMAIN counts (DGA detection), query type distribution |

| `zeek_dns_tunneling_check` | Detect DNS tunneling via entropy analysis and encoding detection |

### HTTP Analysis

| Tool | Description |

|------|-------------|

| `zeek_query_http` | Search HTTP requests by host, URI, method, user agent, status code |

| `zeek_suspicious_http` | Find suspicious HTTP: POSTs to IPs, unusual agents, large bodies, base64 in URLs |

### SSL/TLS Analysis

| Tool | Description |

|------|-------------|

| `zeek_query_ssl` | Search SSL/TLS by SNI, version, validation status, certificate fields |

| `zeek_expired_certs` | Find expired, self-signed, or invalid certificates |

### File Analysis

| Tool | Description |

|------|-------------|

| `zeek_query_files` | Search file extractions by MIME type, hash, filename, size |

| `zeek_executable_downloads` | Find executable transfers (PE, ELF, scripts) on the wire |

### Security Notices

| Tool | Description |

|------|-------------|

| `zeek_query_notices` | Search Zeek security notices (port scans, invalid certs, custom alerts) |

### SSH Analysis

| Tool | Description |

|------|-------------|

| `zeek_query_ssh` | Search SSH connections by auth status, direction, client/server |

| `zeek_ssh_bruteforce` | Detect SSH brute force attempts exceeding a failure threshold |

### DHCP & Asset Discovery

| Tool | Description |

|------|-------------|

| `zeek_query_dhcp` | Search DHCP logs for lease assignments and device discovery |

| `zeek_dhcp_asset_map` | Build MAC-to-IP/hostname asset map for network inventory |

### Cross-Log Investigation

| Tool | Description |

|------|-------------|

| `zeek_investigate_host` | Full host investigation across all log types |

| `zeek_investigate_uid` | Follow a connection UID across all log types |

### Software Discovery

| Tool | Description |

|------|-------------|

| `zeek_software_inventory` | List detected software and versions on the network |

### Analytics

| Tool | Description |

|------|-------------|

| `zeek_detect_beaconing` | Detect C2 beaconing by analyzing connection interval regularity and jitter |

| `zeek_detect_anomalies` | Statistical anomaly detection: port scans, data exfiltration, unusual ports |

### Suricata IDS

| Tool | Description |

|------|-------------|

| `suricata_query_alerts` | Search Suricata alerts by signature, severity, IP, protocol, time |

| `suricata_alert_summary` | High-level alert summary: top signatures, categories, IPs, severity distribution |

| `suricata_correlate_zeek` | Cross-reference Suricata alerts with Zeek logs for full context |

| `suricata_eve_stats` | Suricata engine statistics: packets, flows, detection performance |

### Sensor Management

| Tool | Description |

|------|-------------|

| `nids_sensor_status` | Live sensor status: log inventory, sizes, freshness, health checks |

## Resources

| Resource | URI | Description |

|----------|-----|-------------|

| Log Types | `zeek://log-types` | All Zeek log types with field descriptions |

| Stats | `zeek://stats` | Sensor statistics and available log types |

## Prompts

| Prompt | Description |

|--------|-------------|

| `triage-alert` | Triage a Suricata alert by cross-referencing with Zeek logs |

| `investigate-host` | Guided host investigation workflow across all logs |

| `hunt-for-c2` | Threat hunting for C2 communication patterns |

| `network-baseline` | Generate a network activity baseline |

## Supported Log Types

conn, dns, http, ssl, files, notice, weird, x509, smtp, ssh, dpd, software, dhcp, ntp, ocsp, websocket

## Testing

```bash

npm test

```

110 tests covering parsers (JSON + TSV), query engine, CIDR/wildcard filters, analytics (entropy, beaconing, anomaly detection), Suricata eve.json parsing, DHCP log parsing, and sensor status.

### Generate Test Data

```bash

npm run generate-logs

npx tsx scripts/generate-zeek-logs.ts --output=/tmp/zeek-logs --format=json

```

## Project Structure

```

zeek-mcp/

  src/

    index.ts                 # MCP server entry point

    config.ts                # Environment config + validation

    types.ts                 # Zeek log type definitions (16 log types)

    resources.ts             # MCP resources

    prompts.ts               # MCP prompts (4 workflows)

    parser/

      index.ts               # Format-agnostic parser + log resolution

      json.ts                # JSON log parser

      tsv.ts                 # TSV log parser with header detection

    query/

      engine.ts              # Query engine with filtering/sorting

      filters.ts             # CIDR match (v4+v6), wildcard, range operators

      aggregation.ts         # Statistical aggregation functions

    tools/

      connections.ts         # Connection analysis tools

      dns.ts                 # DNS analysis tools

      http.ts                # HTTP analysis tools

      ssl.ts                 # SSL/TLS analysis tools

      files.ts               # File analysis tools

      notices.ts             # Security notice tools

      ssh.ts                 # SSH analysis tools

      investigation.ts       # Cross-log investigation tools

      software.ts            # Software/asset discovery

      dhcp.ts                # DHCP log tools + asset mapping

      beaconing.ts           # Beaconing detection tool

      anomaly.ts             # Anomaly detection tool

      suricata.ts            # Suricata eve.json tools

      sensor.ts              # Sensor status + health checks

    analytics/

      entropy.ts             # Shannon entropy calculation

      beaconing.ts           # Beacon detection algorithms

      anomaly.ts             # Statistical anomaly detection

  tests/

    parser.test.ts           # Parser unit tests (JSON + TSV)

    query.test.ts            # Query engine + filter tests

    analytics.test.ts        # Entropy, beaconing, anomaly tests

    tools.test.ts            # Integration tests with sample data

    suricata.test.ts         # Suricata eve.json parsing tests

    dhcp.test.ts             # DHCP log parsing + asset map tests

    beaconing-tools.test.ts  # Beaconing + anomaly detection tests

    sensor.test.ts           # Sensor status tests

  test-data/                 # Sample Zeek + Suricata logs

  scripts/

    generate-zeek-logs.ts    # Mock data generator

```

## License

MIT
ecosyste.ms

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https://github.com/solomonneas/zeek-mcp

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README
