feat(cloudflare-rules-list): add Cloudflare Rules List stream connector (#7043)

stream/cloudflare-rules-list/.env.sample

@@ -0,0 +1,24 @@
+# OpenCTI
+OPENCTI_URL=http://localhost:8080
+OPENCTI_TOKEN=ChangeMe
+
+# Connector
+CONNECTOR_ID=ChangeMe
+CONNECTOR_TYPE=STREAM
+CONNECTOR_NAME=Cloudflare Rules List
+CONNECTOR_SCOPE=cloudflare
+CONNECTOR_LOG_LEVEL=info
+CONNECTOR_LIVE_STREAM_ID=live
+CONNECTOR_LIVE_STREAM_LISTEN_DELETE=true
+CONNECTOR_LIVE_STREAM_NO_DEPENDENCIES=true
+# Minimum interval between snapshot uploads ('30m', '1h', '1h30m', or seconds)
+CONNECTOR_SYNC_INTERVAL=1h
+
+# Cloudflare
+CLOUDFLARE_ACCOUNT_ID=ChangeMe
+# API token with 'Account > Account Filter Lists > Edit' permission
+CLOUDFLARE_API_TOKEN=ChangeMe
+# ID of the existing Cloudflare Rules List (IP kind) to sync into
+CLOUDFLARE_LIST_ID=ChangeMe
+# Base URL of the Cloudflare API. Override only for testing or a compatible gateway.
+# CLOUDFLARE_API_BASE_URL=https://api.cloudflare.com/client/v4

stream/cloudflare-rules-list/Dockerfile

@@ -0,0 +1,19 @@
+FROM python:3.12-alpine
+
+ENV CONNECTOR_TYPE=STREAM \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1
+
+# connectors-sdk is installed from a git URL, so git/build tooling is needed at build time.
+# libmagic is a runtime dependency of pycti (python-magic) and must remain installed.
+COPY src /opt/opencti-connector-cloudflare-rules-list
+RUN apk --no-cache add git build-base libffi-dev openssl-dev libmagic && \
+    cd /opt/opencti-connector-cloudflare-rules-list && \
+    pip3 install --no-cache-dir --upgrade pip && \
+    pip3 install --no-cache-dir -r requirements.txt && \
+    apk del git build-base
+
+COPY entrypoint.sh /
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

stream/cloudflare-rules-list/README.md

@@ -0,0 +1,161 @@
+# OpenCTI Cloudflare Rules List Connector
+
+A **STREAM** connector that pushes **IPv4** threat-intelligence indicators and
+observables from OpenCTI into a
+[Cloudflare Rules List](https://developers.cloudflare.com/waf/tools/lists/),
+where they can be referenced from WAF custom rules, firewall rules, and other
+Cloudflare security configurations.
+
+## Table of Contents
+
+- [Introduction](#introduction)
+- [Requirements](#requirements)
+- [Configuration variables](#configuration-variables)
+- [Deployment](#deployment)
+- [Behavior](#behavior)
+- [Capabilities and limitations](#capabilities-and-limitations)
+- [Development](#development)
+
+## Introduction
+
+Cloudflare Rules Lists are reusable collections of IP addresses scoped to a
+Cloudflare account. This connector subscribes to an OpenCTI live stream and
+keeps a target Rules List (of **IP** kind) in sync with the IPv4 indicators and
+`IPv4-Addr` observables known to OpenCTI.
+
+Cloudflare's list-items API follows a **replace/snapshot** model: each upload
+replaces the full contents of the list. The connector therefore maintains an
+in-memory snapshot of all known IPv4 values and pushes the complete snapshot at
+most once per `CONNECTOR_SYNC_INTERVAL`.
+
+## Requirements
+
+- OpenCTI Platform 7.x. The connector pins `pycti==7.260728.0`; because pycti
+  follows the platform's CalVer scheme, its major version must match your
+  OpenCTI platform. Align the pin with your platform version if it differs.
+- A Cloudflare account and an existing Rules List of **IP** kind
+- A Cloudflare API token with the `Account > Account Filter Lists > Edit`
+  permission
+- Python 3.11 or 3.12 (for local runs; the SDK requires `< 3.13`)
+
+## Configuration variables
+
+Configuration is read (in precedence order) from environment variables, then a
+`config.yml` or `.env` file next to the connector, then field defaults.
+
+A full, generated reference is available in
+[`__metadata__/CONNECTOR_CONFIG_DOC.md`](__metadata__/CONNECTOR_CONFIG_DOC.md).
+
+### OpenCTI configuration
+
+| Parameter     | config.yml      | Docker env var   | Mandatory | Description                              |
+| ------------- | --------------- | ---------------- | --------- | ---------------------------------------- |
+| OpenCTI URL   | `opencti.url`   | `OPENCTI_URL`    | Yes       | The base URL of the OpenCTI instance.    |
+| OpenCTI Token | `opencti.token` | `OPENCTI_TOKEN`  | Yes       | The API token to connect to OpenCTI.     |
+
+### Base connector configuration
+
+| Parameter          | config.yml                   | Docker env var               | Default               | Mandatory | Description                                                                 |
+| ------------------ | ---------------------------- | ---------------------------- | --------------------- | --------- | --------------------------------------------------------------------------- |
+| Connector ID       | `connector.id`               | `CONNECTOR_ID`               | /                     | Yes       | A unique `UUIDv4` identifier for this connector instance.                    |
+| Connector Name     | `connector.name`             | `CONNECTOR_NAME`             | `Cloudflare Rules List` | No      | Name of the connector as shown in OpenCTI.                                  |
+| Connector Scope    | `connector.scope`            | `CONNECTOR_SCOPE`            | `cloudflare`          | No        | The scope of the stream connector (comma-separated).                        |
+| Log Level          | `connector.log_level`        | `CONNECTOR_LOG_LEVEL`        | `error`               | No        | `debug`, `info`, `warn`, `warning`, or `error`.                             |
+| Live Stream ID     | `connector.live_stream_id`   | `CONNECTOR_LIVE_STREAM_ID`   | /                     | Yes       | The ID of the OpenCTI live stream to connect to (e.g. `live`).              |
+| Listen Delete      | `connector.live_stream_listen_delete` | `CONNECTOR_LIVE_STREAM_LISTEN_DELETE` | `true` | No | Whether to receive delete events from the live stream. Must be `true` for the connector to drop removed IPs from the list. |
+| No Dependencies    | `connector.live_stream_no_dependencies` | `CONNECTOR_LIVE_STREAM_NO_DEPENDENCIES` | `true` | No | Whether to ignore object dependencies when processing live-stream events.   |
+| Sync Interval      | `connector.sync_interval`    | `CONNECTOR_SYNC_INTERVAL`    | `1h`                  | No        | Minimum interval between snapshot uploads (`30m`, `1h`, `1h30m`, seconds).  |
+
+### Cloudflare configuration
+
+| Parameter            | config.yml             | Docker env var          | Default | Mandatory | Description                                                            |
+| -------------------- | ---------------------- | ----------------------- | ------- | --------- | --------------------------------------------------------------------- |
+| Account ID           | `cloudflare.account_id`| `CLOUDFLARE_ACCOUNT_ID` | /       | Yes       | Cloudflare account ID that owns the Rules List.                       |
+| API Token            | `cloudflare.api_token` | `CLOUDFLARE_API_TOKEN`  | /       | Yes       | API token with `Account > Account Filter Lists > Edit` permission.    |
+| List ID              | `cloudflare.list_id`   | `CLOUDFLARE_LIST_ID`    | /       | Yes       | ID of the existing Rules List (IP kind) to sync into.                 |
+| API Base URL         | `cloudflare.api_base_url` | `CLOUDFLARE_API_BASE_URL` | `https://api.cloudflare.com/client/v4` | No | Base URL of the Cloudflare API. Override only for testing or a compatible gateway. |
+
+> The Rules List must already exist and be of **IP** kind. Create it under
+> Cloudflare → Manage Account → Configurations → Lists, then copy its ID.
+
+## Deployment
+
+### Docker Deployment
+
+Build the image and start the container:
+
+```shell
+docker compose up -d
+# -or, if you've made local changes-
+docker compose up -d --build
+```
+
+### Manual Deployment
+
+Create a `config.yml` from the sample, fill in your values, then:
+
+```shell
+cd src
+pip install -r requirements.txt
+python main.py
+```
+
+`git` must be available when installing requirements because `connectors-sdk` is
+fetched from its repository.
+
+## Behavior
+
+1. **Verify** the configured Cloudflare Rules List exists (and log its kind).
+2. **Full sync** on startup: load all IPv4 indicators and `IPv4-Addr`
+   observables from OpenCTI into an in-memory snapshot, then immediately push
+   that snapshot to Cloudflare.
+3. **Listen** to the OpenCTI live stream — cache IPv4 values on create/update,
+   drop them on delete.
+4. **Replace** the entire Cloudflare list with the current snapshot, then poll
+   the resulting bulk operation to completion. This push is triggered by
+   live-stream events and throttled to **at most once per
+   `CONNECTOR_SYNC_INTERVAL`** — an idle stream produces no uploads even after
+   the interval elapses.
+
+IPv4 values are extracted from three shapes: STIX indicators with an
+`[ipv4-addr:value = '...']` pattern, STIX SCOs with `type: "ipv4-addr"`, and
+OpenCTI observables with `entity_type: "IPv4-Addr"`.
+
+Each entry written to the Cloudflare list is tagged with a comment of the form
+`OpenCTI: <id>`, recording the source OpenCTI object ID.
+
+## Capabilities and limitations
+
+- **IPv4 only.** IPv6 addresses, domains, URLs, file hashes, and every other
+  indicator/observable type are ignored. Indicators match only when their STIX
+  pattern is `[ipv4-addr:value = '...']` (a single address, or a CIDR inside the
+  quotes); compound patterns contribute only their first IPv4 value.
+- **No built-in score, label, confidence, or marking filtering.** Every IPv4 the
+  connector sees is pushed to the list. To restrict *which* entities reach the
+  connector, scope the OpenCTI **live stream definition** (e.g. by score or
+  labels) — the connector itself applies no filtering.
+- **The startup full sync is not stream-filtered.** It loads *all* IPv4
+  indicators and `IPv4-Addr` observables from the platform via the OpenCTI API,
+  regardless of the live stream's filters. Only the incremental live updates
+  honor the stream definition, so a filtered stream and the full sync can
+  disagree on what belongs in the list.
+- **State is in-memory.** The snapshot is rebuilt by a full sync on every
+  restart; nothing is persisted locally.
+- **Removals happen on delete events only.** A revoked or expired indicator is
+  dropped from the list when its delete event arrives, which requires
+  `CONNECTOR_LIVE_STREAM_LISTEN_DELETE=true`.
+- **The Cloudflare list is owned by the connector.** Because each sync *replaces*
+  the entire list, any items added to it outside the connector are overwritten on
+  the next push. Use a dedicated list.
+
+## Development
+
+Run the test suite (requires Python 3.11/3.12):
+
+```shell
+pip install -r tests/test-requirements.txt pytest-cov
+pytest tests/ --cov=cloudflare_rules_list --cov-report=term-missing
+```
+
+`pytest-cov` is installed explicitly above (it is intentionally not listed in
+`tests/test-requirements.txt`).

stream/cloudflare-rules-list/__metadata__/CONNECTOR_CONFIG_DOC.md

@@ -0,0 +1,22 @@
+# Connector Configurations
+
+Below is an exhaustive enumeration of all configurable parameters available, each accompanied by detailed explanations of their purposes, default behaviors, and usage guidelines to help you understand and utilize them effectively.
+
+### Type: `object`
+
+| Property | Type | Required | Possible values | Default | Description |
+| -------- | ---- | -------- | --------------- | ------- | ----------- |
+| OPENCTI_URL | `string` | ✅ | Format: [`uri`](https://json-schema.org/understanding-json-schema/reference/string#built-in-formats) |  | The base URL of the OpenCTI instance. |
+| OPENCTI_TOKEN | `string` | ✅ | string |  | The API token to connect to OpenCTI. |
+| CONNECTOR_LIVE_STREAM_ID | `string` | ✅ | string |  | The ID of the live stream to connect to. |
+| CLOUDFLARE_ACCOUNT_ID | `string` | ✅ | string |  | Cloudflare account ID that owns the Rules List. |
+| CLOUDFLARE_API_TOKEN | `string` | ✅ | Format: [`password`](https://json-schema.org/understanding-json-schema/reference/string#built-in-formats) |  | Cloudflare API token with the 'Account > Account Filter Lists > Edit' permission. |
+| CLOUDFLARE_LIST_ID | `string` | ✅ | string |  | ID of the existing Cloudflare Rules List (IP kind) to sync into. |
+| CONNECTOR_NAME | `string` |  | string | `"Cloudflare Rules List"` | The name of the connector. |
+| CONNECTOR_SCOPE | `array` |  | string | `["cloudflare"]` | The scope of the stream connector. |
+| CONNECTOR_LOG_LEVEL | `string` |  | `debug` `info` `warn` `warning` `error` | `"error"` | The minimum level of logs to display. |
+| CONNECTOR_TYPE | `const` |  | `STREAM` | `"STREAM"` |  |
+| CONNECTOR_LIVE_STREAM_LISTEN_DELETE | `boolean` |  | boolean | `true` | Whether to listen for delete events on the live stream. |
+| CONNECTOR_LIVE_STREAM_NO_DEPENDENCIES | `boolean` |  | boolean | `true` | Whether to ignore dependencies when processing events from the live stream. |
+| CONNECTOR_SYNC_INTERVAL | `string` |  | string | `"1h"` | Minimum interval between snapshot uploads to Cloudflare. Accepts a duration like '30m', '1h', '1h30m', or a bare number of seconds. |
+| CLOUDFLARE_API_BASE_URL | `string` |  | string | `"https://api.cloudflare.com/client/v4"` | Base URL of the Cloudflare API. Override only for testing against a mock server or a Cloudflare-compatible gateway. |

stream/cloudflare-rules-list/__metadata__/connector_config_schema.json

@@ -0,0 +1,97 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://www.filigran.io/connectors/cloudflare-rules-list_config.schema.json",
+  "type": "object",
+  "properties": {
+    "OPENCTI_URL": {
+      "description": "The base URL of the OpenCTI instance.",
+      "format": "uri",
+      "maxLength": 2083,
+      "minLength": 1,
+      "type": "string"
+    },
+    "OPENCTI_TOKEN": {
+      "description": "The API token to connect to OpenCTI.",
+      "type": "string"
+    },
+    "CONNECTOR_NAME": {
+      "default": "Cloudflare Rules List",
+      "description": "The name of the connector.",
+      "type": "string"
+    },
+    "CONNECTOR_SCOPE": {
+      "default": [
+        "cloudflare"
+      ],
+      "description": "The scope of the stream connector.",
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "CONNECTOR_LOG_LEVEL": {
+      "default": "error",
+      "description": "The minimum level of logs to display.",
+      "enum": [
+        "debug",
+        "info",
+        "warn",
+        "warning",
+        "error"
+      ],
+      "type": "string"
+    },
+    "CONNECTOR_TYPE": {
+      "const": "STREAM",
+      "default": "STREAM",
+      "type": "string"
+    },
+    "CONNECTOR_LIVE_STREAM_ID": {
+      "description": "The ID of the live stream to connect to.",
+      "type": "string"
+    },
+    "CONNECTOR_LIVE_STREAM_LISTEN_DELETE": {
+      "default": true,
+      "description": "Whether to listen for delete events on the live stream.",
+      "type": "boolean"
+    },
+    "CONNECTOR_LIVE_STREAM_NO_DEPENDENCIES": {
+      "default": true,
+      "description": "Whether to ignore dependencies when processing events from the live stream.",
+      "type": "boolean"
+    },
+    "CONNECTOR_SYNC_INTERVAL": {
+      "default": "1h",
+      "description": "Minimum interval between snapshot uploads to Cloudflare. Accepts a duration like '30m', '1h', '1h30m', or a bare number of seconds.",
+      "type": "string"
+    },
+    "CLOUDFLARE_ACCOUNT_ID": {
+      "description": "Cloudflare account ID that owns the Rules List.",
+      "type": "string"
+    },
+    "CLOUDFLARE_API_TOKEN": {
+      "description": "Cloudflare API token with the 'Account > Account Filter Lists > Edit' permission.",
+      "format": "password",
+      "type": "string",
+      "writeOnly": true
+    },
+    "CLOUDFLARE_LIST_ID": {
+      "description": "ID of the existing Cloudflare Rules List (IP kind) to sync into.",
+      "type": "string"
+    },
+    "CLOUDFLARE_API_BASE_URL": {
+      "default": "https://api.cloudflare.com/client/v4",
+      "description": "Base URL of the Cloudflare API. Override only for testing against a mock server or a Cloudflare-compatible gateway.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "OPENCTI_URL",
+    "OPENCTI_TOKEN",
+    "CONNECTOR_LIVE_STREAM_ID",
+    "CLOUDFLARE_ACCOUNT_ID",
+    "CLOUDFLARE_API_TOKEN",
+    "CLOUDFLARE_LIST_ID"
+  ],
+  "additionalProperties": true
+}

stream/cloudflare-rules-list/__metadata__/connector_manifest.json

@@ -0,0 +1,26 @@
+{
+  "title": "Cloudflare Rules List",
+  "slug": "cloudflare-rules-list",
+  "description": "Cloudflare Rules Lists are reusable collections of IP addresses that can be referenced from WAF custom rules, firewall rules, and other security configurations across a Cloudflare account.\n\nThe integration of Cloudflare with OpenCTI enables the automatic dissemination of IPv4 threat-intelligence indicators and observables into a Cloudflare Rules List. The connector consumes IPv4 indicators from an OpenCTI live stream, maintains an in-memory snapshot, and periodically replaces the contents of a target Cloudflare Rules List (IP kind) using Cloudflare's bulk list-items API documented at https://developers.cloudflare.com/api/resources/rules/subresources/lists/.",
+  "short_description": "Push IPv4 threat-intelligence indicators from OpenCTI into a Cloudflare Rules List for use in WAF and firewall rules.",
+  "logo": "stream/cloudflare-rules-list/__metadata__/logo.png",
+  "use_cases": [
+    "Detection & Response Enablement"
+  ],
+  "solution_categories": [
+    "Network Security"
+  ],
+  "license_type": "Commercial",
+  "contact": null,
+  "verified": false,
+  "last_verified_date": null,
+  "playbook_supported": false,
+  "max_confidence_level": 50,
+  "support_version": ">= 6.7.5",
+  "subscription_link": "https://developers.cloudflare.com/waf/tools/lists/",
+  "source_code": "https://github.com/OpenCTI-Platform/connectors/tree/master/stream/cloudflare-rules-list",
+  "manager_supported": true,
+  "container_version": "rolling",
+  "container_image": "opencti/connector-cloudflare-rules-list",
+  "container_type": "STREAM"
+}

stream/cloudflare-rules-list/docker-compose.yml

@@ -0,0 +1,25 @@
+services:
+  connector-cloudflare-rules-list:
+    image: opencti/connector-cloudflare-rules-list:rolling
+    container_name: opencti-connector-cloudflare-rules-list
+    restart: unless-stopped
+    environment:
+      # OpenCTI
+      - OPENCTI_URL=${OPENCTI_URL}
+      - OPENCTI_TOKEN=${OPENCTI_TOKEN}
+
+      # Connector
+      - CONNECTOR_ID=${CONNECTOR_ID}
+      - CONNECTOR_TYPE=STREAM
+      - CONNECTOR_NAME=Cloudflare Rules List
+      - CONNECTOR_SCOPE=cloudflare
+      - CONNECTOR_LOG_LEVEL=${CONNECTOR_LOG_LEVEL:-info}
+      - CONNECTOR_LIVE_STREAM_ID=${CONNECTOR_LIVE_STREAM_ID:-live}
+      - CONNECTOR_LIVE_STREAM_LISTEN_DELETE=true
+      - CONNECTOR_LIVE_STREAM_NO_DEPENDENCIES=true
+      - CONNECTOR_SYNC_INTERVAL=${CONNECTOR_SYNC_INTERVAL:-1h}
+
+      # Cloudflare
+      - CLOUDFLARE_ACCOUNT_ID=${CLOUDFLARE_ACCOUNT_ID}
+      - CLOUDFLARE_API_TOKEN=${CLOUDFLARE_API_TOKEN}
+      - CLOUDFLARE_LIST_ID=${CLOUDFLARE_LIST_ID}

stream/cloudflare-rules-list/entrypoint.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+cd /opt/opencti-connector-cloudflare-rules-list
+python3 main.py

stream/cloudflare-rules-list/src/cloudflare_rules_list/__init__.py

@@ -0,0 +1,11 @@
+"""OpenCTI -> Cloudflare Rules List stream connector (v2).
+
+Pushes IPv4 threat-intelligence indicators from OpenCTI into a Cloudflare
+Rules List, built on the modern OpenCTI ``connectors-sdk`` + Pydantic-settings
+architecture (OpenCTI 7.x / pycti 7.x).
+"""
+
+from .connector import Connector
+from .settings import ConnectorSettings
+
+__all__ = ["Connector", "ConnectorSettings"]