openNAC Sensor Software Architecture

openNAC Enterprise solution is the next step in the evolution of data Network Access Control Solutions. openNAC is a simple but feature-rich and flexible solution to build and control enterprise Network Access, which combines existing OpenSource technologies with advanced features for multi-tenancy, automatic provision and elasticity. openNAC follows a bottom-up approach driven by sysadmins, devops and users real needs.

Sizing an openNAC Sensor Instance

The dimension of Network Access solution infrastructure can be directly inferred from the expected workload in terms of users, IPs, types of authentication or use cases deployed that the NAC must sustain. The workload may be complicated to estimate, but this is a crucial exercise to build an efficient NAC Architecture.

The minimum recommended specs are for the openNAC solutions are:

Resources	Minimum	Recommended configuration
Memory	16 GB	64 GB
CPU	8 CPU	16 CPUs
Disk Size	100 GB	100 GB
Disk Type	SCSI/SATA	SSD
Network	2 NICS	3 NICS

Note

Two network interfaces are required, one for administration (Communication between openNAC devices) and one for production purposes (to SPAN Port).

Supported Network Cards

Capacity	Medium	Network Card
1Gb	Copper	Intel 8254x/8256x/8257x/8258x
1Gb	Fiber	Intel 82575/82576/82580/I350
10Gb	Fiber	Intel 82599/X520/X540/X550
40Gb	Fiber	Intel X710/XL7100