Fortress ES820 Vehicle Mesh Point

Wireless Mesh Point for Vehicles & Mobile Applications

The Fortress® ES820 Vehicle Mesh Point brings secure wireless communications to land and sea vehicles through a self-forming, self-healing mesh network. Powered by variable DC power, the ES820 offers FIPS 140-2 compliant security and is upgradable to NSA Suite B algorithms. Delivered in a small and rugged form factor with its size, weight and power specifically tailored for vehicles, the Fortress ES820 functions as both a wireless access point and bridge, and allows for a separate dash-mountable control panel. The ES820 is ideal for:

  • Unmanned Ground Vehicles (UGVs)
  • Vehicle convoys
  • Deployed ground vehicles and ships
  • Command Centers

Product Details


In military operations, when convoys, command centers, UVs, supplies, soldiers and vehicles are brought to an area where there is no reliable communications infrastructure, Fortress Vehicle Mesh Points allow for these distributed assets to connect to the network without the considerations and constraints associated with traditional wired networks.

  • Establish a mobile wireless network where no infrastructure exists
  • Allows mobile assets to seamlessly leave and join the network
  • Low size, weight and power for integration into vehicles
  • Ruggedized for use in harsh environments
  • FIPS 140-2 validated data encryption
  • DOD Unified Capabilities Approved Products List
  • Industry leading radio range


  • Vehicle Convoys
  • Condition Based Maintenance
  • Incident Response

Fortress Wireless Mesh Points Now on the DoD Approved Products List

The Defense Information Systems Agency (DISA) has approved the Fortress ES2440 and ES820 secure wireless mesh points for inclusion on the DoD Unified Capabilities Approved Products List (UC APL). All four Fortress wireless mesh points are now included on the list which already included the ES520 and ES210. To view the Fortress products on the list select “Fortress Technologies” from the vendor pull down list.


Fortress ES820 Datasheet



View Document


Dimensions 6.85” x 6.75” x 1.75”
Weight 2.5 lbs
Mounting Flat mount via mounting holes
Interfaces Via MIL Connector 


  • 2x 10/100BT
  • USB
  • Serial
  • LED wires (Power, Status, Enet1, Enet2, Radio1, Radio2)
  • Control wires (Power, Blackout Mode, RF Kill, Reset, Zeroize)


  • 3 Pin Conn-X Connector


  • 2x N-Type Connectors


Networking IP Compatibility: IPv4 and IPv6; Integrated DHCP and DNS
Wireless: 802.11 a/b/g/n AP, Bridge, Mesh Point
Performance Sustained FIPS Crypto Throughput: 50 Mbps (Ethernet); 50 Mbps (Wireless)
Security FIPS 


  • FIPS 140-2 Level 2


  • AES-CTR-128/192/256
  • AES-GCM-128/256
  • AES-CCM-128 WPA2 (802.11i)
  • IPsec (Suite B & Legacy) (Optional)
  • NSA Suite B Upgradeable


Environmental Operating temperature: -40˚C to +70˚C (-40˚F to +158˚F)
Storage Temperature: -40˚C to +70˚C (-40˚F to +158˚F)
Cooling: Convection Cooled (no fans)
Humidity: 5% - 95% Non-Condensing
Power Voltage: 11 to 30 VDC with built-in power Conditioner
Power Draw: ES820-35 11W; ES820-34 12W
Certifications Safety & Emissions
  • FCC, CB Test, IC, RoHS
Environmental – RoHS-6
NIST – FIPS 140-2 Level 2
JITC – UCAPL Certified
Wi-Fi Alliance – Wi-Fi a/b/g, WPA2
Weather Resistance Protection Rating
  • IP67 Submersible Enclosure
100,000 Hours MTBF
DOD Unified Capabilities Approved Products List (UC APL)



Fortress Wireless Mesh Point Release 5.4.5 Now FIPS and Common Criteria Certified!

General Dynamics is pleased to announce that the latest Fortress Mesh software version 5.4.5 is now FIPS 140-2 and Common Criteria certified for the Fortress ES520ES820 and ES2440 mesh points. The two standards specify and ensure that security requirements are met for cryptographic modules and system security. Both certifications are required by the U.S. government for all Commercial Off-the-Shelf (COTS) Information Assurance (IA) IT product acquisitions used to protect National Security Systems (NSS). Since 1998 over 30 Fortress wireless products have been FIPS 140 certified. The Fortress ES520, ES820 and ES2440 mesh points are the only mesh products on the market that have FIPS 140 and Common Criteria certification, and are listed on the DoD Unified Capabilities Approved Products List (UC APL) and Commercial Solutions for Classified (CSfC) Components List.


Fortress Mesh Point Release 5.4.5 Highlights:

  • FIPS 140-2 Certification
  • Compliance with Common Criteria Wireless LAN and VPN Protection Profiles
  • Support for BATS Wireless Antenna Tracking Systems – Enables automatic alignment of antennas and automatic tracking of moving network nodes

For a complete list of details please see the Release Notes.

For more information on FIPS-140-2 please visit the NIST website.

For more information about Common Criteria please visit the NIAP website.

The 5.4.5 software upgrade is available at no additional cost to all customers with active warranty or maintenance and support agreements and can be downloaded through the General Dynamics Mission Systems Dropbox.


End-of-Life Announcement for Fortress ES Software Versions 5.1 through 5.3

General Dynamics announces the End-of-Life (EoL) for the Fortress ES software versions 5.1, 5.2 and 5.3, effective immediately. We will continue to provide technical Help Desk support and honor all currently active warranty and maintenance agreements, but customers may be required to upgrade to software release 5.4 or later. Click here to learn more.



Customer Support Is Our #1 Priority 

You are never alone when you partner with General Dynamics to secure your critical information. General Dynamics is committed to support our customers worldwide with a 24/7 technical Help Desk.

Help Desk — Contact our technical Help Desk 24 hours a day/7 days a week:

Sales — Contact our Sales Team for sales related questions:
Fax: 781-455-5555

Our Fortress support page is designed to make it easy for customers to access the information they need. Please visit for additional information and the following support features:

Product Update Notifications — Sign up to receive technical bulletins, upgrade notices and other important product information automatically via E-mail

Warranty Status — Enter the serial number of your device to find out the date your warranty or maintenance expires

Depot Status — Track your repair RMAs

Fortress Technology

FastPath Mesh
Fortress FastPath Mesh is a self-forming, self-healing, path optimizing network architecture designed from the ground up to support truly mobile and often transported networks. FastPath Mesh elegantly addresses the needs of dynamic tactical networks enabling spontaneous network formation and scalability that extends the range of end-to-end connectivity and allows units to join and exit the network seamlessly and securely. The fully distributed architecture dynamically builds the network and adapts to change with no single point of failure or central controller. FastPath Mesh utilizes all network interfaces and radio links to reach a destination using the lowest cost path. End-to-end encryption and traffic awareness is overlaid on the mesh for improved overall network performance. Fortress' mesh is IPv4 and IPv6 compatible.

Industry Leading Performance
Fortress products offer Industry-leading Wi-Fi range and performance. Using industry standard 802.11 a/b/g and n, Fortress radios operate in the 2.4 GHz and 5.8 GHz Wi-Fi bands and optionally in the 4.4 GHz and 4.9 GHz bands. Fortress has proven performance with distances in excess of 32 miles.

Compact & Rugged
Fortress Mesh Points are the lightest and smallest in the industry, with diverse power sources and low power consumption. Fortress Mesh Points are easily embeddable in larger systems and have undergone rigorous testing and validation to withstand the harshest environmental conditions and frequent transportation. These tests include MIL-STD-810G testing for shock, vibration and temperature, MIL-STD-1275 for vehicle power input, MIL-STD-461F for RF immunity, and IP67 for water and dust resistance. Additionally, Fortress Mesh Points are designed to minimize their unintentional RF signature. They meet MIL-STD-461F for unintentional RF emissions and standards for operation in proximity to personnel, ordinance and feel.

Comprehensive Security
Fortress products ensure data security at all times on sensitive networks using the most advanced security implementations in the industry. Using standards based interoperable and compliant security protocols certified to FIPS-140-2 and upgradeable to NSA Suite B cryptography, Fortress is a leader in secure wireless networking. Fortress products are unique in that they support built-in RADIUS, advanced Wi-Fi WPA2 security with EAP-TLS, use a hardware crypto implementation and have hardware based True Random Number Generator (TRNG) ensuring the highest level of security and performance.

4.4 GHz Licensed C Band for U.S. Military and NATO Use
Fortress products can operate in the 4.4 GHz C Band a licensed band allocated to US and NATO military use. Operating at 4.4 GHz in the C Band offers several advantages. 4.4 GHz is a licensed band restricted to military use, so it offers an additional level of security, and less crowded use of the spectrum.

802.11n uses channel bonding and payload optimization to give Wi-Fi better performance. Channel bonding, uses two separate non-overlapping channels to transmit data at the same time. This technique also increases the amount of data that can be transmitted. Payload optimization allows more data to be stuffed into each transmitted packet.

Fortress FastPath Mesh products are optimized to minimize multicast and broadcast traffic, improving the performance of the network. FastPath Mesh snoops Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) requests, subscribes to the streams on behalf of the listeners and forwards traffic only on relevant interfaces. Minimizing multicast and broadcast traffic frees up bandwidth for other uses, increased throughput and better latency.

To ensure products can be deployed for years in tough operating environments where failure is not an option, Fortress products are designed to have a very low failure rate and a Mean Time Between Failure (MTBF) greater than 100,000 hours or 11 years of continuous operation.

Dynamic Frequency Selection
Dynamic Frequency Selection (DFS) allows automatic detection of radar signals and switching to another channel in less than 10 seconds as per the IEEE 802.11h standard. Fortress products are the only solution to support DFS in both Infrastructure and Mesh mode.

GPS capability provides real-time position data. This data is displayed in Fortress's Topology Viewer and Mesh Viewer applications. Fortress has also provided integration for Google Earth, and Cursor on Target / FalconView for Blue Force Tracking and other applications.

2009 Frost & Sullivan New Product Innovation Award
Wireless networks are rapidly becoming major force multipliers in modern military communication platforms. Mobile ad-hoc communication networks (MANETS), and specifically vehicular ad-hoc networks (VANETS), form the backbone of the future network centric operations (NCO) architecture. The ES820 received the Frost & Sillivan New Product Innovation Award for Military VANET Solutions. This was awarded based on the revolutionary design of the ES820.

Fortress Wireless Mesh Point Administrator Training

Fortress Wireless Mesh Point Administrator training is a three day course held at our Annapolis Junction, MD facility.The course encompasses a wide range of topics designed for Fortress customers and business partners. The three day course is designed to specifically meet the needs of the network operators, administrators, and engineers who plan to create secure wireless networks using Fortress wireless mesh points. The session includes a comprehensive hands-on lab to practice the methods taught in the lecture. Students who pass a short written and practical exam will receive a certificate. Upon completion of this course, students will have acquired a basic knowledge of RF theory and wireless technology. In addition students will be able to operate, maintain and perform administrative functions associated with FastPath Mesh Point platforms, including ES2440, ES520, and ES820. For more information please visit the Fortress training page.

The Course Includes:

  • Various Fortress hardware / software platforms
  • Static and mobile wireless configurations
  • Basic RF theory and environmental operational fundamentals
  • Installation/mounting requirements for indoor/outdoor use
  • Secure client/node communications via WPA, WPA2, PSK, WPA/PSK and Fortress
  • 802.11 a/b/g/n fundamentals, site requirements
  • Point-to-point / multi-point configuration
  • Bridging, mesh and VLAN configuration
  • Node and mesh point management
  • Suite B security