SEL SEL-3622 Security Gateway

SEL-3622

Security Gateway

A router, VPN endpoint, and firewall device, the SEL-3622 Security Gateway can perform secure and proxy user access for a small number of serial- and Ethernet-based IEDs.

The SEL-3622 helps create a user audit trail through strong, centralized, user-based authentication and authorization to modern and legacy IEDs.

The SEL-3622 secures your control system communications with a stateful deny-by-default firewall, strong cryptographic protocols, and logs for system awareness.

The SEL-3622 also manages protected IED passwords, ensuring that passwords are changed regularly and conform to complexity rules. The SEL-3622 supports enhanced security, enabling you to protect critical cyberassets with strong multifactor authentication technologies, such as RSA SecurID using Remote Authentication Dial-In User Service (RADIUS).

With four IPsec profiles available, including 2022 Secure, which contains updated cipher suites, the SEL-3622 offers best-in-class encryption and authentication of information packets.

The SEL-3622 resists known and unknown malware attacks with exe-GUARD embedded antivirus technology.

Powerful rootkit resistance, embedded Linux mandatory access controls, and process allowlisting help mitigate attacks against the gateway itself and eliminate costly patch management and antivirus signature updates.

The SEL-3622 supports NERC CIP v3 and v5 compliance efforts without needing Technical Feasibility Exceptions (TFEs).

The SEL-3622 integrates physical awareness sensors through an onboard accelerometer, light sensor, and input contact sensor.

The SEL-3622 also alerts when Ethernet cables are connected or disconnected, alerting operators to potential remote cyberattacks or physical equipment manipulation.

The SEL-3622 supports SEL-5827 Virtual Connect Client and SEL-5828 Virtual Port Service Software.

These applications are provided for free by SEL to make remote SEL-3622 ports available for existing software and terminal applications on your PC, including those using Modbus TCP/RTU.

The SEL-3622 was designed and built in cooperation with the U.S. Department of Energy National SCADA Test Bed and the following companies:

Schweitzer Engineering Laboratories, Inc.

EnerNex Corporation

Tennessee Valley Authority

Sandia National Laboratories

Physical Security Protections

Alert on possible malicious physical activity with a physical sensor components on the SEL-3622.

The SEL-3622 can detect sudden movement (through an embedded accelerometer), sudden changes in visible light (through an embedded light sensor), the opening of cabinet doors (through an input sensor), and the connection and disconnection of Ethernet cables.Secured Proxy Access to Relays and IEDs

Use the SEL-3622 to provide a central point of entry to critical cyberassets, including those from SEL and others, with user-based access control and detailed activity logs.IED Password Management

Enforce strong passwords on IEDs, and have them automatically changed on a configurable schedule.

Satisfy regulatory password requirements, and ensure that no weak or default passwords are in use.Substation Firewall

Secure your substation network from malicious traffic with a powerful deny-by-default firewall. Manage status and configuration with an intuitive, menu-driven web interface. Use virtual local-area networks (VLANs) to segregate traffic and improve network organization and performance.Routing and NAT

Forward communications among separate Ethernet networks with static routes.

The device supports Network Address Translation (NAT) for a wide variety of dynamic network applications. Port forwarding enables the use of a similar remote address space without redesigning IP subnets, and the outbound NAT supports Internet access for those applications that require it.IPsec VPN

Integrate with existing IT and control systems over VPN tunnels that are secured using IPsec. Use X.509 certificates with Online Certificate Status Protocol (OCSP) to centrally manage VPN trust.Exe-GUARD Allowlist Antivirus

Protect against known and unknown malware with embedded allowlist antivirus. Reduce patch cycles and resist zero-day attacks without additional settings.Analog Bit-Based Protocol Conversion

Transform Conitel and other bit-based protocols to Ethernet, and reduce reliance on expensive analog circuits.User Activity Reports

Log and time-stamp user access events and every command. Integrate event records into existing log management systems using Syslog.Single Sign-On

Log on to the SEL-3622. not individual IEDs. Users have a single account and password to remember—their own.

Manage user accounts and group memberships centrally using LDAP-accessible systems, such as Microsoft Active Directory, or RADIUS. RADIUS allows you to enhance security with multifactor authentication, such as RSA SecurID.Support NERC CIP Requirements

Implement strong user-based access controls to the electronic security perimeter (ESP) while protecting IEDs with strong passwords and blocking shared or default accounts. Granular access controls limit users' access to their assigned roles on individual IEDs.Industry-Vetted Security and Interoperability

IRIG-B time synchronization receives and distributes the IRIG-B signal to maintain time synchronization.

X.509 certificates ensure strong authentication for incoming connection requests.

OCSP certificate revocation operates with standard certificate servers to centrally revoke certificates and prevent unwanted connections.

HTTPS web interface allows convenient, secure setup and management and eliminates the need for extra PC software.

Syslog logs events for consistency and compatibility and enables centralized collection.

IPsec (RFC 4301. 4302. 4303) creates a secure VPN.

Lemnos interoperability facilitates communications between Cisco routers and Lemnos-compliant devices.