Policy Audit · Rule Conversion · Zero-Downtime Cutover

Firewall Migration Services
Any Vendor to FortiGate

Migrate from Cisco ASA, Palo Alto, Check Point, SonicWall, or Juniper to FortiGate NGFW. We audit, convert, deploy, and validate every rule — with full rollback capability and zero unplanned downtime.

Our Methodology

Why Upgrade Your Firewall

Legacy firewalls — Cisco ASA, older SonicWall, end-of-life Juniper SRX — lack the inspection capabilities modern threats demand. They cannot decrypt TLS 1.3 traffic at line rate, lack application-layer visibility, and have no native sandboxing or threat intelligence integration.

End-of-support devices receive no vulnerability patches. Every CVE disclosure becomes a permanent exposure in your perimeter. Compliance frameworks (PCI DSS 4.0, RBI, ISO 27001) require supported, patched infrastructure.

But firewall migration is not a simple swap. Rulesets that grew over years contain shadow rules, redundant entries, and undocumented exceptions. A careless migration can break applications, expose services, or create security gaps. That is why methodology matters.

20-40%
Rule Reduction After Audit
<5m
HA Cutover Downtime
100%
Rollback Capability
NSE7
Certified Engineers

We Migrate From Any Platform

Vendor-agnostic source support — we have migrated all of these to FortiGate successfully.

Cisco ASA
ASA 5500/5500-X
Palo Alto
PA-Series / VM-Series
Check Point
R77/R80/R81+
SonicWall
TZ / NSA / NSsp
Juniper
SRX / SSG / NetScreen
Cisco FTD
Firepower / FMC

Migration Methodology

1

Config Export & Discovery

Export running configuration from source firewalls. Inventory all interfaces, zones, VLANs, routing instances, VPN tunnels, NAT rules, and policy sets. Document network topology, traffic flows, and integration points (SIEM, RADIUS, LDAP, syslog).

2

Policy Audit & Cleanup

Analyse every rule against traffic logs. Identify shadow rules (never hit), redundant rules, overly permissive rules (any-any), and orphaned objects. Produce a cleanup report with recommendations for rule consolidation, tightening, and removal. Get stakeholder sign-off before conversion.

3

Automated Conversion

Run source config through FortiConverter to generate FortiGate configuration. Converts address objects, service objects, policy rules, NAT statements, routing, and VPN parameters. Output includes a conversion report highlighting items needing manual attention (unsupported features, ambiguous mappings).

4

Manual Review & Enhancement

Engineers review every converted rule. Map application-layer policies (Palo Alto App-ID to FortiGate application control signatures). Configure IPS profiles, SSL inspection, web filtering, and antivirus per zone pair. Add Security Fabric connectors and FortiGuard subscriptions.

5

Lab Validation & Testing

Deploy the converted configuration on the new FortiGate in a lab or staging environment. Test connectivity for every zone pair, verify NAT translations, VPN tunnel establishment, routing convergence (OSPF/BGP), and application access. Run traffic generators to validate throughput and HA failover.

6

Parallel Deployment & Cutover

Install the new FortiGate alongside the existing firewall. Shift traffic gradually using routing changes or VRRP priority adjustments. Monitor for policy mismatches by comparing logs on both devices. Complete cutover during a maintenance window. Keep old firewall on standby for 2-4 weeks.

Everything Gets Converted

Security Policies & ACLs

Every access rule, application policy, and zone-based firewall rule is converted to FortiGate policy syntax. Source/destination objects, service groups, schedules, and logging settings are preserved. Application-layer rules are mapped to FortiGate application control signatures.

NAT Rules

Static NAT, dynamic PAT, policy NAT, and twice-NAT configurations are converted to FortiGate VIP objects and IP pool NAT policies. We validate every NAT translation in the lab before production cutover to prevent service disruption.

VPN Tunnels

Site-to-site IPsec (IKEv1/v2), GRE-over-IPsec, DMVPN, and SSL VPN configurations. Phase 1/Phase 2 parameters, PFS groups, DPD settings, and proxy IDs are matched precisely. Remote access VPN migrates from AnyConnect/GlobalProtect to FortiClient with equivalent split-tunnel and MFA policies.

Routing (OSPF/BGP/Static)

Dynamic routing configurations including OSPF areas, BGP peering, route maps, prefix lists, and redistribution policies. Static routes with metrics and administrative distances. Policy-based routing for traffic steering. BFD for fast convergence.

HA & Clustering

Active-passive, active-active, and clustering configurations are recreated on FortiGate. Session sync, heartbeat links, HA priorities, and monitored interfaces are configured. FGCP (FortiGate Clustering Protocol) provides sub-second failover with session preservation.

Integrations

RADIUS/LDAP authentication, syslog forwarding, SNMP monitoring, SIEM integration (Splunk, QRadar), and API automation scripts are reconfigured. FortiGate Security Fabric connectors enable integration with FortiAnalyzer, FortiSandbox, and FortiClient EMS.

Policy Audit — What We Find

Every firewall ruleset accumulates technical debt over the years. Our audit identifies and resolves it before migration.

Shadow Rules

Rules that are never matched because a broader rule higher in the policy table catches the traffic first. These indicate policy ordering issues and create a false sense of security. We identify and remove or reorder them.

Overly Permissive Rules

Rules using "any" as source, destination, or service — often added as temporary fixes that became permanent. We tighten these to specific hosts, networks, and ports based on actual traffic analysis from firewall logs.

Orphaned Objects

Address objects, service groups, and network groups not referenced by any active policy. These accumulate over years of rule changes and make the configuration harder to manage. We clean them out during migration.

Duplicate & Redundant Rules

Multiple rules that achieve the same traffic outcome, often added by different administrators over time. We consolidate these into clean, well-documented policies with proper naming conventions and comments.

Post-Migration Security Enhancement

SSL Deep Inspection

Decrypt and inspect TLS 1.3 traffic for threats hiding in encrypted sessions. Configure certificate exceptions for financial and healthcare applications.

IPS & Threat Prevention

FortiGuard IPS signatures with virtual patching protect against known CVEs. AI-powered FortiGuard detects zero-day exploits and advanced persistent threats.

Sandboxing

FortiSandbox integration detonates suspicious files in a safe environment before they reach endpoints. Blocks zero-day malware that signature-based detection misses.

Security Fabric

Connect FortiGate with FortiSwitch, FortiAP, FortiClient EMS, and FortiAnalyzer for unified visibility, automated response, and single-pane management.

Frequently Asked Questions

We use a combination of automated tools (FortiConverter, manual scripting) and manual review. FortiConverter parses source configs (Cisco ASA, Palo Alto, Check Point, SonicWall, Juniper) and generates FortiGate policy equivalents. Every converted rule is then manually reviewed by our NSE-certified engineers to verify object mappings, NAT translations, and application control accuracy. We never trust blind automated conversion — human validation is mandatory.

Site-to-site IPsec tunnels are recreated on the new firewall with matching Phase 1/Phase 2 parameters. During parallel deployment, we run tunnels on both old and new firewalls simultaneously using different tunnel IPs. Cutover involves a coordinated switch at both ends. SSL VPN and remote access configurations are migrated including user groups, split-tunnel ACLs, and MFA integration. We test every tunnel before decommissioning the old device.

Yes, this is one of our most common migration paths. We handle ACLs to FortiGate policies, NAT statements, interface configurations, routing (OSPF/BGP/static), VPN tunnels (both site-to-site and AnyConnect to FortiClient), and failover HA. Cisco ASA's stateful packet filtering maps to FortiGate's NGFW policies with the addition of application control, IPS, and SSL inspection that ASA lacks.

Yes. Policy audit and cleanup is a core part of every migration. We analyse hit counts, last-used timestamps, and rule dependencies to identify shadow rules (never matched due to prior rules), redundant rules (same effect as other rules), and orphaned objects (not referenced in any policy). We present a cleanup report before migration showing what will be removed, consolidated, or tightened. Most firewall rulesets shrink by 20-40% through this process.

For active-passive HA, we typically migrate the standby unit first — converting it to the new platform while the primary handles traffic. Once the new standby is validated, we failover, migrate the old primary, and establish HA on the new platform. For active-active clusters, we use a parallel deployment approach with traffic gradually shifted via routing changes. Total production downtime is typically under 5 minutes per cluster.

We maintain a complete audit trail of every rule change — source config, converted config, modifications, and justifications. This satisfies PCI DSS requirement 1.1.1 (formal change management), ISO 27001 A.13 (network security management), and RBI cybersecurity framework requirements. We provide before/after comparison reports suitable for auditor review.

A single firewall pair with 200-500 rules typically takes 3-4 weeks (1 week discovery + audit, 1 week conversion + lab validation, 1 week parallel deployment, 1 week monitoring + handover). Complex environments with 1000+ rules, multiple contexts/VDOMs, or extensive VPN meshes may take 6-8 weeks. We provide a detailed timeline during the assessment phase.

We always maintain the old firewall in a ready-to-restore state for 2-4 weeks after cutover. If critical issues arise, we can roll back within minutes by reverting routing changes. During the parallel monitoring period, we run both firewalls simultaneously and compare traffic logs to catch any policy gaps before decommissioning the old device.

Ready to Upgrade Your Firewall?

Get a free policy audit of your existing firewall. We will assess your ruleset, identify cleanup opportunities, and provide a detailed migration plan.

FortiGate Firewalls