# Master NGFW Engine license limits

Master NGFW Engines use the same NGFW Engine licenses as other NGFW Engines. The NGFW Engine licenses enable the Virtual NGFW Engine features.

Virtual NGFW Engines do not require their own licenses. However, the NGFW Engine license limits the number of Virtual Resources that can be created. The limit for the number of Virtual Resources limits how many Virtual NGFW Engines can be created. You can optionally increase the allowed number of Virtual Resources by purchasing and installing a feature-specific license.