“Translating security intent into multi-vendor firewall CLI should take milliseconds without waiting on vendor management consoles or manual syntax lookups.”

Enterprise network migrations frequently stall during security policy translation across heterogenous vendors.

I built a client-side polyglot engine that evaluates policy paths and outputs valid Palo Alto PAN-OS, Cisco ASA, and NSX-T HCL syntax instantly.

The Multi-Vendor Syntax Nightmare

Engineers migrating workloads between private clouds and hybrid environments struggle with vendor syntax drift.

A rule defined for Distributed Firewalling inside VMware NSX-T looks entirely different from a Palo Alto Security Rulebase entry.

• NSX-T HCL: Declarative JSON/HCL targeting security groups and service paths.
• Palo Alto PAN-OS CLI: Imperative set commands combining zones, services, and NAT rules.
• Cisco ASA CLI: Legacy extended access lists referencing network object groups.

// # Mapping internal protocol definitions to vendor-specific CLI constructs
const portMap: Record<string, { num: string, name: string }> = {
  tcp80: { num: '80', name: 'service-http' },
  tcp443: { num: '443', name: 'service-https' },
  tcp1433: { num: '1433', name: 'service-ms-sql' },
  tcp22: { num: '22', name: 'service-ssh' },
  tcp3389: { num: '3389', name: 'service-ms-rdp' }
};

Real-Time Zero-Trust Evaluation

The engine validates traffic paths against Zero-Trust Network Access principles before outputting syntax.

If a requested route violates three-tier boundary rules, the system immediately flag-blocks the request.

For allowed paths, the engine renders syntactically accurate configurations ready for terminal deployment.

# Generating Palo Alto PAN-OS security and NAT rules in real time
set rulebase security rules rule_db_to_pci from db-zone to pci-zone source any destination any service service-ms-sql action allow log-start yes
set rulebase nat rules SNAT_web_to_internet from web-zone to internet-zone source any destination any service any translate-to "src-pat: dynamic-ip-and-port (Interface: ethernet1/1)"

Edge-First Client Execution

Executing policy generation entirely within the browser guarantees zero latency and total privacy.

Sensitive internal zone names and IP ranges never touch a remote backend server during calculation.

The utility is live inside the portfolio NetOps diagnostic suite for instant operational use.

Key Takeaway

Automated Policy Translation eliminates manual CLI syntax errors during complex firewall migrations. Building interactive client-side tooling turns abstract architecture rules into actionable engineering outputs.

Reach out at sachin@virtualsach.in or follow my work on GitHub.