Cisco ASA to Fortinet Migration Tool
Migrating from Cisco ASA to Fortinet? NetConverter's comprehensive multi-step pipeline automates the conversion of ACLs, NAT rules, and object groups to FortiOS policies and VIPs with 95%+ accuracy and confidence scoring.
Why Cisco ASA → FortiGate Migrations Need Central NAT Awareness
Moving from Cisco ASA 9.x to FortiOS 7.4 is increasingly common as enterprises consolidate on Fortinet's Security Fabric. The biggest semantic decision NetConverter makes upfront: which FortiGate NAT mode to target. ASA's NAT model (object NAT + twice NAT) maps to either FortiGate's per-policy NAT or central NAT — the choice affects every NAT translation downstream. NetConverter defaults to central NAT mode for production migrations because it preserves rule-table separation and matches how most FortiGate deployments operate; you can override per-config via YAML.
The other migration consideration: ASA's nameif/security-level model doesn't have a clean equivalent in FortiGate's interface-zone model. ASA nameif outside security-level 0 maps to a FortiGate interface in role wan with zone wan; inside security-level 100 becomes role lan zone lan. Custom nameifs trigger a zone-inference flag for review. NetConverter's zone-inference KB has 200+ patterns covering common ASA naming conventions (DC-INSIDE, EXT-OUT, MGMT, etc.).
The Challenge of ASA to FortiGate Migration
ACL to Policy Translation
Cisco ASA extended ACLs must be converted to FortiGate's firewall policies with interface-pair based matching.
NAT to VIP Conversion
ASA object NAT and twice NAT rules need to be converted to FortiGate VIP objects and IP pools.
Object-Group Migration
Network objects, service objects, and object-groups must be converted to FortiGate address and service objects.
Security Level Mapping
ASA's interface security levels don't exist in FortiGate - policies must explicitly define srcintf/dstintf.
How NetConverter Solves It
Vendor-Neutral Translation
Our comprehensive multi-step pipeline normalizes configurations to a unified format, enabling accurate translation between any vendor pair.
Intelligent Policy Generation
ACLs are converted to FortiGate policies with proper interface assignments based on security analysis.
Automated VIP Creation
NAT rules are converted to VIP objects with correct external/mapped IP and port configurations.
Complete Object Migration
All network objects, service objects, and groups are converted with naming preserved.
Interface Mapping
Security level based rules are translated to explicit interface-pair policies.
4-Tier Validation System
Every translation undergoes comprehensive validation: syntax correctness, semantic accuracy, vendor best practices compliance, and AI-assisted review.
Confidence Scoring
Each conversion includes a confidence score indicating translation quality, helping you prioritize review efforts and ensuring production readiness.
See Quick Convert Output in Action
Representative Quick Convert run for this migration path, showing the live NetConverter interface and the converted output preview engineers review before deployment.
Migration Results
Why Teams Choose This Over FortiConverter-Only Flows
Broader conversion program support
FortiConverter is aligned to Fortinet destination workflows, while NetConverter supports broader migration initiatives and multi-vendor planning.
Validation-first output review
Converted objects and policies are validated before downstream execution so teams can identify risky gaps early.
Reusable process for repeat migrations
Standardize ASA to FortiGate translation runs across many configs without rebuilding the workflow for each project.
Need Custom Development or Complex Migration Support?
For large-scale enterprise migrations, custom protocol requirements, or dedicated engineering support, our team is here to help.
Ready to Migrate?
Convert your Cisco ASA configuration to Fortinet FortiGate in minutes. No credit card required.
Start Free MigrationFrequently Asked Questions
Should I use FortiGate central NAT or per-policy NAT for an ASA migration?
How does ASA's interface-based security-level translate to FortiGate?
security-level 0 typically maps to role wan, zone wan; security-level 100 maps to role lan, zone lan; intermediate levels (DMZ at 50) map to custom zones. The mapping is reviewable in Conversion Studio before final output.Can NetConverter handle ASA failover/HA configurations during migration?
How does ASA NAT exemption (identity NAT) translate to FortiGate?
nat enable=disable, or a per-policy entry with NAT explicitly disabled. NetConverter chooses based on the central-vs-per-policy mode setting. The Evidence Report shows every NAT exemption with the resulting FortiGate construct.