You Don't Need a VPN to comply with PCI DSS

readme.md

These snippits relate to the blog post

The Great VPN Myth: What PCI DSS 4.0 Actually Requires for Remote Access

https://www.pomerium.com/blog/the-great-vpn-myth-what-pci-dss-40-actually-requires-for-remote-access

AdminAccessWithMFA.yaml

# Admin access requiring device identity and MFA
allow:
  and:
    - authenticated_user: true
    - device:
        approved: true
        type: enclave_only
    - groups:
        has: pci-admin
# is this a known, company managed device by cert
    - client_certificate:
        san_email:
            ends_with: '@company.com'
deny:
  or:
    - invalid_client_certificate: true
    - http_method:
        is: DELETE

LeastUserPrivlege.yaml

# Finance team access to cardholder data
allow:
  and:
    - authenticated_user: true
    - groups:
        has: pci-authorized-finance
    - http_path:
        starts_with: /cardholder-data
    - device:
        approved: true
        type: enclave_only
deny:
  or:
    - invalid_client_certificate: true

ModernAccessControlPPL.yaml

# Comprehensive PCI DSS compliant policy
allow:
  and:
    # Identity verification
    - authenticated_user: true
    - domain:
        is: company.com
    
    # Role-based access
    - groups:
        has: pci-authorized
    
    # Device security
    - device:
        approved: true
        type: enclave_only
    
    # Certificate validation
    - client_certificate:
        san_email:
            ends_with: '@company.com'
    
    # Time-based controls
    - time_of_day:
        timezone: UTC
        after: 9:00:00
        before: 17:00:00
    - day_of_week: mon-fri

deny:
  or:
    # Security controls
    - invalid_client_certificate: true
    - http_method:
        is: DELETE
    
    # Suspicious patterns
    - http_path:
        contains: /admin

pomerium-logs1.json

{
  "level": "info",
  "service": "authorize",
  "request-id": "46747f58-a3d2-4f6b-9d7c-f3209e16c8b1",
  "method": "GET",
  "path": "/cardholder-data/transactions",
  "host": "payment.corp.example.com",
  "session-id": "46b36e11-9938-4c97-b869-b9237573f04f",
  "allow": true,
  "allow-why-true": ["policy-match"],
  "deny": false,
  "deny-why-false": [],
  "user": "941b0719-89c2-40fa-a25d-c6c7039f7a8f",
  "email": "finance-user@company.com",
  "time": "2024-03-16T14:22:55Z",
  "message": "authorize check"
}

pomerium-logs2.json

{
  "level": "info",
  "service": "authorize",
  "request-id": "8675309a-1234-5678-90ab-cdef12345678",
  "method": "POST",
  "path": "/cardholder-data/modify",
  "host": "payment.corp.example.com",
  "session-id": "98765432-abcd-efgh-ijkl-mnopqrstuvwx",
  "allow": false,
  "allow-why-false": ["group-membership-required"],
  "deny": true,
  "deny-why-true": ["outside-business-hours"],
  "user": "72f20a3b-9876-5432-10fe-dcba09876543",
  "email": "vendor@partner.com",
  "time": "2024-03-16T03:15:22Z",
  "message": "authorize check"
}

TimeLimitedVendorAccessPPL.yaml

# Temporary vendor access with strict time controls
allow:
  and:
    - email:
        ends_with: '@vendor-company.com'
    - groups:
        has: external-contractor
    - authenticated_user: true
    - time_of_day:
        timezone: UTC
        after: 9:00:00
        before: 17:00:00
    - day_of_week: mon-fri
    - device:
        type: any
    - client_certificate:
        san_email:
            ends_with: '@vendor-company.com'