├── .github
├── dependabot.yml
└── workflows
│ └── tailscale.yml
├── .gitignore
├── LICENSE
├── README.md
├── create-network-map.py
├── images
├── Animation.gif
└── example.png
├── network_topology.html
├── policy.hujson
├── requirements.txt
└── version-cache.json
/.github/dependabot.yml:
--------------------------------------------------------------------------------
1 | # To get started with Dependabot version updates, you'll need to specify which
2 | # package ecosystems to update and where the package manifests are located.
3 | # Please see the documentation for all configuration options:
4 | # https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
5 |
6 | version: 2
7 | updates:
8 | - package-ecosystem: "pip" # See documentation for possible values
9 | directory: "/" # Location of package manifests
10 | schedule:
11 | interval: "weekly"
12 |
--------------------------------------------------------------------------------
/.github/workflows/tailscale.yml:
--------------------------------------------------------------------------------
1 | name: Sync Tailscale ACLs
2 |
3 | on:
4 | push:
5 | branches: ["main"]
6 | pull_request:
7 | branches: ["main"]
8 |
9 | permissions:
10 | # Give the default GITHUB_TOKEN write permission to commit and push the changed files back to the repository.
11 | contents: write
12 |
13 | jobs:
14 | acls:
15 | runs-on: ubuntu-latest
16 |
17 | steps:
18 | - uses: actions/checkout@v4
19 | with:
20 | ref: ${{ github.head_ref }}
21 |
22 | - name: Deploy ACL
23 | if: github.event_name == 'push'
24 | id: deploy-acl
25 | uses: tailscale/gitops-acl-action@v1
26 | with:
27 | api-key: ${{ secrets.TS_API_KEY }}
28 | tailnet: ${{ secrets.TS_TAILNET }}
29 | action: apply
30 |
31 | - name: Test ACL
32 | if: github.event_name == 'pull_request'
33 | id: test-acl
34 | uses: tailscale/gitops-acl-action@v1
35 | with:
36 | api-key: ${{ secrets.TS_API_KEY }}
37 | tailnet: ${{ secrets.TS_TAILNET }}
38 | action: test
39 |
40 | # Rebuild HTML
41 | - name: Set up Python 3.10
42 | uses: actions/setup-python@v5
43 | with:
44 | python-version: "3.10"
45 | cache: "pip" # caching pip dependencies
46 |
47 | - name: Install dependencies
48 | run: |
49 | python -m pip install --upgrade pip
50 | pip install -r requirements.txt
51 |
52 | - name: Run Python script to generate network map
53 | run: python create-network-map.py
54 |
55 | # This will place the newly generated network map HTML file back into the repo
56 | - name: Update network map in repo
57 | uses: stefanzweifel/git-auto-commit-action@v5
58 | with:
59 | commit_message: Auto updating network_topology.html
60 | # Be aware of limitations here: https://github.com/stefanzweifel/git-auto-commit-action?tab=readme-ov-file#limitations--gotchas
61 |
--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 | go-example/
2 | __pycache__/
3 | .vscode/
4 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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/README.md:
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1 | # Tailscale Network Topology Mapper
2 | ### A visual way to view your ACL rules for Tailscale
3 | I occasionally find myself just wanting to get a glance of how my ACL rules look without reading through the code. This is also useful for showing how our policies are set up to people who are not devs by trade.
4 |
5 | 
6 |
7 | # Initial Set Up
8 | 0. You will need Python3 and git installed.
9 | 1. `git clone https://github.com/SimplyMinimal/tailscale-network-topology-mapper`
10 | 2. `cd tailscale-network-topology-mapper`
11 | 3. `pip install -r requirements.txt`
12 | 4. Copy your ACL policy into the contents of the example `policy.hujson`
13 | 5. Edit `create-network-map.py` and change `COMPANY_DOMAIN="example.com"` to your actual company domain
14 |
15 | # Execution
16 | 6. Run `python create-network-map.py` to generate your network map. It should produce an updated `network_topology.html` file that you can open in your browser.
17 |
18 | You can filter down to specific groups or nodes using the filter bar at the top or by clicking on a node on the graph.
19 |
20 | ### Github Action Workflow
21 | If you would like to have the network map be automatically updated whenever you push an update to your ACL file then take a look at this example workflow:
22 | [.github/workflows/tailscale.yml](https://github.com/SimplyMinimal/tailscale-network-topology-mapper/blob/main/.github/workflows/tailscale.yml)
23 |
24 | ## Limitations
25 | * This project is in an early alpha stage.
26 | * It can only map what is available in the ACL policy file. It is not an active scanning tool that will seek out other hosts.
27 | * It only focuses on the ACL rules themselves but eventually this may start capturing ALL the available valid ACL sections.
28 |
29 | Pull requests welcome! :)
30 |
31 | ## Experimental Ideas and TODOs
32 | * Use `tailscale debug netmap` to build a more in-depth map
33 | * Allow switching between layers such as port level, host level, user/group level
34 |
--------------------------------------------------------------------------------
/create-network-map.py:
--------------------------------------------------------------------------------
1 | import os
2 | import json
3 | import hjson
4 | from pyvis.network import Network
5 |
6 | # TODO: Update your company domain here
7 | COMPANY_DOMAIN="example.com"
8 |
9 | if "TS_COMPANY_DOMAIN" in os.environ:
10 | COMPANY_DOMAIN = os.environ["TS_COMPANY_DOMAIN"]
11 | print(f'Using {COMPANY_DOMAIN} as company domain')
12 |
13 | def load_json_or_hujson_file(filename):
14 | if not os.path.isfile(filename):
15 | print(f"Error: File '{filename}' not found.")
16 | return None
17 |
18 | with open(filename, 'r') as f:
19 | # Try loading as JSON
20 | try:
21 | data = json.load(f)
22 | return data
23 | except ValueError:
24 | # If loading as JSON fails, try loading as HuJSON
25 | f.seek(0)
26 | try:
27 | data = hjson.load(f)
28 | return data
29 | except Exception as e:
30 | print(f"Error decoding '{filename}' as HuJSON: {e}")
31 | return None
32 |
33 |
34 | # Step 1: Parse the ACL File using json
35 | acl_file_path = 'policy.hujson'
36 | acl_data = load_json_or_hujson_file(acl_file_path)
37 | if acl_data is None:
38 | print("Error: Could not parse ACL policy file")
39 | exit(1)
40 |
41 | # Step 2: Extract Hosts, Groups, and Tag Owners
42 | hosts = acl_data.get('hosts', {})
43 | groups = acl_data.get('groups', {})
44 | tag_owners = acl_data.get('tagOwners', {})
45 |
46 | # Step 3: Extract ACL Rules
47 | acls = acl_data.get('acls', [])
48 |
49 | # Preprocess ACL rules to merge nodes with similar hostnames
50 | merged_acls = []
51 | for rule in acls:
52 | src = set()
53 | dst = set()
54 | for node in rule['src']:
55 | if node.startswith('tag:'):
56 | src.add(node) # Preserve the entire tag format
57 | #src.add(node.split(':')[1]) # Extract tag name
58 | elif node.startswith('autogroup:'):
59 | src.add(node) # Preserve the entire autogroup format
60 | elif node.startswith('group:'):
61 | src.add(node) # Preserve the entire group format
62 | #src.add(node.split(':')[1]) # Extract group name
63 | else:
64 | hostname = node.split(':')[0] # Extract hostname
65 | src.add(hostname)
66 | for node in rule['dst']:
67 | if node.startswith('tag:'):
68 | dst.add(node) # Preserve the entire tag format
69 | #dst.add(node.split(':')[1]) # Extract tag name
70 | elif node.startswith('autogroup:'):
71 | dst.add(node) # Preserve the entire autogroup format
72 | #dst.add(node.split(':')[1]) # Extract group name
73 | elif node.startswith('group:'):
74 | dst.add(node) # Preserve the entire group format
75 | #dst.add(node.split(':')[1]) # Extract group name
76 | else:
77 | hostname = node.split(':')[0] # Extract hostname
78 | dst.add(hostname)
79 | merged_acls.append({'action': rule['action'], 'src': src, 'dst': dst})
80 |
81 | # Step 4: Construct Network Topology Graph
82 | net = Network(height="800px", width="100%", notebook=True, directed=True, filter_menu=True,select_menu=True,neighborhood_highlight=True, cdn_resources='remote')
83 |
84 | # Define colors for different node types
85 | group_color = "#FFFF00" # Group color (Yellow)
86 | tag_color = "#00cc66" # Tag color (Green)
87 | host_color = "#ff6666" # Host color (Red)
88 |
89 | # TODO: Coalesce this into a smaller function
90 | # Add nodes and edges based on preprocessed ACL rules
91 | for rule in merged_acls:
92 | for src in rule['src']:
93 | if src.startswith('tag:'):
94 | net.add_node(src, color=tag_color)
95 | elif COMPANY_DOMAIN in src:
96 | net.add_node(src, color=group_color)
97 | elif src.startswith('autogroup:'):
98 | net.add_node(src, color=group_color)
99 | elif 'group:' in groups:
100 | net.add_node(src, color=group_color)
101 | else:
102 | net.add_node(src, color=host_color)
103 |
104 | for dst in rule['dst']:
105 | if dst.startswith('tag:'):
106 | net.add_node(dst, color=tag_color)
107 | elif COMPANY_DOMAIN in dst:
108 | net.add_node(dst, color=group_color)
109 | elif dst.startswith('autogroup:'):
110 | net.add_node(dst, color=group_color)
111 | elif 'group:' in groups:
112 | net.add_node(dst, color=group_color)
113 | else:
114 | net.add_node(dst, color=host_color)
115 | net.add_edge(src, dst, arrows={'to': {'enabled': True}}) # Specify arrow options as a dictionary
116 |
117 |
118 | # Step 5: Add a legend for the colors
119 | legend_html = """
120 |
121 |
Legend
122 |
123 | Group
124 |
125 | Tag
126 |
127 | Host
128 |