Clavister E20

Clavister E20 Security Firewall for Smaller Remote/Branch Offices


The Clavister E20 is the perfect entry-level next-generation security appliances, built to deliver comprehensive and powerful enterprise-grade firewall services. Perfectly suited as a customer premise equipment (CPE) in MSSP scenarios or offering enterprise-class security for small branch offices and remote locations. The Clavister E20 is an ideal in solution where multiple firewalls are deployed, often over geographically dispersed areas, and where there’s a strong need for a centrally managed, scalable network security solution.

Don’t be fooled by the small package, this is a real next-generation firewall(NGFW), providing powerful throughput even when using the advanced security features. It proves that you can get NGFW functionality without having to buy the biggest, most expensive box on the market. For even more flexibility, you can upgrade to the Clavister 20 Pro model, and get double the performance out of the same hardware.

  • The Clavister E20 is equipped with a flexible switch block with four 1GbE (RJ45) interfaces, plus two 1GbE (RJ45) interfaces.
  • You also have the option to use the included rack mount kit should you decide you rather mount the Clavister E20 in a rack.

Content Security Services
Having a regular firewall is not enough to prevent attacks from happening on your network. As attacks become more severe and the threat landscape becomes more dynamic, additional measures need to be in place to protect your network. Clavister offers best-of-breed content security services that adds an additional layer of defense, including:

  • Intrusion Detection and Prevention
  • Network centric Anti-Virus / Malware
  • Web Content Filtering / Categorization
  • Anti-Spam
  • IP Reputation

These content security services protect your network from advanced threats your firewall alone cannot stop. The Content Security Services are included in the Clavister Security Subscription (CSS) service.



Additional information

Model Name:


Firewall Performance

1 Gbps

IPsec VPN Performance

50 Mbps

Maximum Concurrent Connections


Maximum Concurrent IPsec VPN Tunnels


Maximum Concurrent L2TP/PPTP/SSL VPN Tunnels


Maximum Number of Users


Maximum Number of Routing Tables (Virtual Routers)


Ethernet Interfaces

4 x 1GbE (RJ45) + 2 1GbE (RJ45)

Interfaces for Management / High Availability (HA)


Configurable Internal / External / DMZ Ports


Local Console Port

Virtual Console – Micro USB

Link Aggregation IEEE 802.1AX-2008 (Static/LACP)


Maximum Number of VLAN Interfaces (802.1q)


Form Factor

Desktop / Rack Mount


44 mm x 280 mm x 180 mm (1.73 in x 11.02 in x 7.09 in

Hardware Weight / Package Weight

1.7 kg (3.75 lb) / 2.6 kg (5.73 lb)

Power Supply (AC)

100-240 VAC, 50-60 Hz

Average Power Consumption

12 W / 41 BTU


2 years


Clavister E20 Spec Sheet

Clavister Product Line


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