DEC4020 – OPNsense® Rack Security Appliance

SKU: DEC4020 Category:


This model has been replaced by the 4200 series.

DEC4020 : DEC4240
DEC4020: Either the DEC4240 with  4x 10Gbps SFP+ or the DEC4280 offering 4x SFP+ and 4x SFP28

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A great performer with AMD EPYC™  octa core processor in a rack mountable enclosure with dual power supply.
This model includes 64GB DDR4 RAM, 1TB M.2. Solid State Flash and can handle upto 21.61bps Firewall & 2.5Gbps IPsec throughput .

Dual Power Supply

Custom designed Failover and Load Balancer*
Designed to last PSU’s with MTBF of 2092K hrs Telcordia TR/SR-332(Bellcore)  or according to MIL-HDBK-217F (25°C) 282K hrs (that is still over 32 years!).|
*  The integrated load balancer is not symmetric, but assures non-interrupted automatic failover.

Large Storage and Memory

One terabyte of integrated storage for logging and advanced features
Sufficient memory for most demanding features and plugins like Zenarmor (for 2000+ connected devices) 

Powerful Octa Core Processor

The fastest of our single die AMD EPYC™ Embedded based solutions

Package Contents

  • 19″ 1U rack appliance
  • Matching powercords (2x)
  • Configuration cable
  • Quickstart guide


All OPNsense® Security Appliances come with 2 Year Carry-in & Return Warranty.

Full Specifications & Model Comparison

Models DEC4020 DEC4040
Preinstalled software OPNsense® OPNsense®
License Open Source + 1 year free Business
Open Source + 1 year free Business
Hardware Specifications
SFP28 Ports [25Gbps] 0 2
SFP+ Ports [10Gbps] 2 2
GbE RJ45 Ports [ 10/100/1000Mbps ] 4 4
USB 3.0 Ports 1 1
Console Port 1 1
Internal Storage 1TB M.2. Solid State Flash 1TB M.2. Solid State Flash
Memory 64GB DDR4 64GB DDR4
CPU Cores 8 (max frequency 3.1Ghz) 8 (max frequency 3.1Ghz)
Virtual Interfaces (802.1q VLANS)1 4093 4093
System Performance
Firewall Throughput 21.1Gbps 27Gpbs
Firewall Packets Per Second 1760Kpps 2300Kpps
Maximum Firewall Port to Port Throughput 9Gbps 21Gpbs
Firewall Port to Port Packets Per Second 122000 1450Kpps
Concurrent Sessions 63000000 63000000
New Connections Per Second 50000 50000
Firewall Latency (average) 100us 100us
Firewall Policies (Recommended Maximum)1 10000 10000
IPsec VPN Throughput (AES256GCM16) 2.5Gbps 2.5Gbps
IPsec VPN Packet Per Second (AES256GCM16) 220Kpps 220Kpps
Threat Protection Throughput Packet Per Second 163Kpps 163Kpps
Threat Protection Throughput ~2Gpbs ~2Gbps
High Availability with State Synchronisation Requires Two Requires Two
Height x Width x Depth (mm) 44.5 (1U) x 482.6 (19″) x 280 (254 excl. panel) 44.5 (1U) x 482.6 (19″) x 280 (254 excl. panel)
Height x Width x Length (inches) 1.75 x 19 x 11 (10 excl. panel) 1.75 x 19 x 11 (10 excl. panel)
Form Factor 19″ Rackmountable 19″ Rackmountable
Weight (appliance only) 3.70Kg 3.85 Kg
Power Requirements 100-240VAC, 50-60Hz 100-240VAC, 50-60Hz
Maximum Current (Single PSU) 2.2A 2.2A
Power Consumption (Typical – Single PSU) 55W 60W
Heat Dissipation 187.6 BTU/hr 204.6 BTU/hr
Operating Temperature 0 to +50°C 0 to +50°C
Storage Temperature -20 to +70°C -20 to +70°C
Humidity 10-90% non-condensing 10-90% non-condensing
Regulatory Compliance
FCC part 15 Class A, CE, Rohs FCC part 15 Class A, CE, Rohs

1 The user interface is designed for normal business usage, large rulesets, high number of users or interface assignments may be less practical.

All measurements are based upon TCP traffic unless stated otherwise. Total Firewall Throughput is calculated based on maximum PPS and standard 1500 byte packets. Maximum PPS is measured using 500 byte packets. IPS performance is measured using ET Open and standard 1500 byte package size. SSL VPN is measured using AES256GCM16+SHA512. Concurrent sessions are based upon memory available, where one state consumes 1KB of memory and 1GB of memory is reserved for system tasks. Latency is measured as an average over 60 seconds.

Supported SFP(+) Modules

When using SFP+Modules, do not mix 2.5/5Gbps and 10Gbps link-speed as the hardware does not support mixing these due to different frequencies.

While most standard LC-LC OM3 SFP+ modules and SFP+ Direct Attached Cables are likely to function we advise to select one of of the known compliant modules from the following list:

SFP+ (Up to 10G)



  •  [FIBER – SR] UP-TR-SR-CI 10G SFP+ 850nm 300m DOM  (Uptimed)
  •  [DAC] ARUBA 10G SFP+ 1m DAC  (Aruba)
  •  [DAC] CISCO SFP-H10GB-CU1M 1m Direct Attach  (Cisco)
  •  [FIBER – LR] SFP-10GLR-31 1/10G SFP+ 1310nm 10km  (FS)
  •  [FIBER – SR] SFP-10GSR-85 10G SFP+ 850nm 300m  (FS)
  •  [DAC] STARTECH DACSFP10G1M (Startech)
  •  [DAC] SFPP-PC02 10G SFP+ DAC 2M (FS)
  •  [DAC] SFPP-PC005 10G SFP+ DAC 0.5M  (FS)
  •  [RJ45] SFP-10G-T 10GBASE-T SFP+ 30m  (FS)
  •  [FIBER – SR] IBM FTLX8571D3BCL-IC 850nm
  •  [FIBER – SR] UBIQUITI UF-MM-10G 300m 850nm
  •  [FIBER-SR] Mellanox MFM1T01A-SR (Mellanox)
  •  [RJ45] UPTIMED UP-TR-10G-RJ45-CI 1/2.5/5/10G SFP+ 30m

SFP (Up to 1G)



  • [RJ45] SFP-GB-GE-T 10/100/1000BASE-T SFP 100m TESTED WITH S/N: F1940333300 (FS)
  • [FIBER – LR BiDi] SFP-GE-BX 1000BASE SFP 1310/1490 10Km (FS)
  • [FIBER – LR BiDi] SFP-GE-BX 1000BASE SFP 1490/1310 10Km (FS)