vmware-nsx-security

VMware NSX Security

Author: Wei Zhou, VMware by Broadcom — [e-mail] This is a community-driven project by a VMware engineer, not an official VMware product. For official VMware developer tools see developer.broadcom.com.

VMware NSX DFW microsegmentation and security MCP skill — 21 tools for distributed firewall policies/rules, security groups, VM tags, Traceflow packet tracing, and IDPS.

Companion skills: vmware-nsx (networking), vmware-aiops (VM lifecycle), vmware-monitor (monitoring)

Quick Start

uv tool install vmware-nsx-security

mkdir -p ~/.vmware-nsx-security
cp config.example.yaml ~/.vmware-nsx-security/config.yaml
# Edit config.yaml with your NSX Manager host

echo "VMWARE_NSX_SECURITY_NSX_PROD_PASSWORD=your_password" > ~/.vmware-nsx-security/.env
chmod 600 ~/.vmware-nsx-security/.env

vmware-nsx-security doctor

Offline / Air-Gapped Install (from source)

This project uses the modern PEP 517 build system (hatchling), so there is no setup.py by design — that is expected, not a missing file. If you cloned the source and hit ERROR: File "setup.py" or "setup.cfg" not found ... editable mode currently requires a setuptools-based build, your pip is older than 21.3 and cannot do an editable (-e) install with a non-setuptools backend. Editable mode is a developer convenience, not needed to run the tool — do one of:

# From the source tree — a normal (non-editable) install builds a wheel:
pip install .              # NOT  pip install -e .

# ...or upgrade pip first, and editable works too:
pip install --upgrade pip && pip install -e .

For a truly air-gapped host, build the wheels on a connected machine and copy them over — the target then needs no network:

# On a connected machine, collect this package + its dependencies as wheels:
pip wheel . -w dist        # → dist/*.whl   (or: uv build, for just this package)

# Copy dist/ to the air-gapped host, then install offline:
pip install --no-index --find-links dist vmware-nsx-security

What It Does

Category	Tools
DFW Policy	list, get, create, update, delete, list rules
DFW Rules	create, update, delete, stats
Security Groups	list, get, create, delete
VM Tags	list tags, apply tag, remove tag
Traceflow	run trace, get result
IDPS	list profiles, signature status + settings

Total: 21 MCP tools (10 read-only + 11 write)

MCP Server Setup

After uv tool install vmware-nsx-security, start the MCP server with one command (v1.5.15+):

# Recommended — single command, no network re-resolve
vmware-nsx-security mcp

# With a custom config path
VMWARE_NSX_SECURITY_CONFIG=/path/to/config.yaml vmware-nsx-security mcp

Add to ~/.claude.json:

{
  "mcpServers": {
    "vmware-nsx-security": {
      "command": "vmware-nsx-security",
      "args": ["mcp"],
      "env": {
        "VMWARE_NSX_SECURITY_CONFIG": "~/.vmware-nsx-security/config.yaml"
      }
    }
  }
}

Alternative: uvx (no install) or legacy entry point

# Run without installing (requires PyPI access each launch)
uvx --from vmware-nsx-security vmware-nsx-security mcp

# Legacy entry point (still works, kept for backward compatibility)
vmware-nsx-security-mcp

Behind a corporate TLS proxy? uvx may fail with invalid peer certificate: UnknownIssuer. Use the recommended vmware-nsx-security mcp form above (no network needed), or set UV_NATIVE_TLS=true.

Common Workflows

Microsegment an Application

# 1. Create groups by tag — via the create_group MCP tool
#    (tag_scope=tier, tag_value=web → matched as Condition value "tier|web";
#     multiple criteria types — tag/IP/segment — are ORed)

# 2. Create DFW policy
vmware-nsx-security policy create web-app-policy --name "Web to App" --category Application

Tag a VM

# Find VM and its external ID
vmware-nsx-security tag list my-vm-01

# Apply tag using the external ID
vmware-nsx-security tag apply <external-id> --scope tier --value web

Trace a Packet

vmware-nsx-security traceflow run <src-lport-id> \
  --src-ip 10.0.1.5 --dst-ip 10.0.2.10 --proto TCP --dst-port 443

Output reports operation_state (IN_PROGRESS/FINISHED/FAILED), hop-by-hop observations discriminated by resource_type (Dropped* entries carry reason + acl_rule_id), and a dfw_hits summary.

Safety

• Dependency checks: Cannot delete a policy with active rules, or a group referenced by DFW rules/scopes; group deletion aborts if the reference scan fails
• Audit logging: All write ops logged to ~/.vmware-nsx-security/audit.log
• Input validation: IDs validated; all API text sanitized against prompt injection
• Dry-run mode: All CLI write commands support --dry-run
• Credential safety: Passwords only from env vars, never in config files

Companion Skills

Skill	Scope	Tools	Install
vmware-aiops ⭐ entry point	VM lifecycle, deployment, guest ops, clusters	49	uv tool install vmware-aiops
vmware-monitor	Read-only monitoring, alarms, events, VM info	27	uv tool install vmware-monitor
vmware-nsx	NSX networking: segments, gateways, NAT, IPAM	33	uv tool install vmware-nsx-mgmt
vmware-storage	Datastores, iSCSI, vSAN	11	uv tool install vmware-storage
vmware-vks	Tanzu Namespaces, TKC cluster lifecycle	20	uv tool install vmware-vks
vmware-aria	Aria Ops metrics, alerts, capacity planning	28	uv tool install vmware-aria

Version Compatibility

NSX Version	Support	Notes
NSX 9.1 / VCF 9.1	✅ Full	DFW + Security Group + Traceflow + IDS/IPS via Policy API. VDS 7.0+ required (N-VDS removed in NSX 9).
NSX 9.0 / VCF 9.0	✅ Full	Same as 9.1. Bare-metal NSX agent removed.
NSX 4.x / VCF 5.x	✅ Full	All features supported.
NSX-T 3.2 / VCF 4.5	✅ Full	Policy API stable.

Official Broadcom References

• SDKs: https://developer.broadcom.com/sdks — VMware NSX for Python SDK (future migration target)
• REST APIs: https://developer.broadcom.com/xapis — NSX-T Data Center REST API
• CLI Tools: https://developer.broadcom.com/tools — VCF PowerCLI 9.1

License

MIT