June 2018
158 Legrand PDU User Guide
Configuring Network Services
The Legrand PDU supports the following network communication services.
HTTPS and HTTP enable the access to the web interface. Telnet and SSH enable the access to the
command line interface. See Using the Command Line Interface (on page 269).
By default, SSH is enabled
, Telnet is disabled, and all TCP ports for supported services are set to standard
ports. You can change default settings if necessary.
Note: Telnet access is disabled by default because it communicates openly and is thus insecure.
Submenu command Refer to
HTTP Changing HTTP(S) Settings (on page 158)
SNMP Configuring SNMP Settings (on page 160)
SMTP Server Configuring SMTP Settings (on page 161)
SSH Changing SSH Settings (on page 162)
Telnet Changing Telnet Settings (on page 163)
Modbus Changing Modbus Settings (on page 163)
Service Advertising Enabling Service Advertising (on page 164)
Important: Legrand uses TLS instead of SSL 3.0 due to published security vulnerabilities in SSL 3.0. Make sure
your network infrastructure, such as LDAP and mail services, uses TLS rather than SSL 3.0.
Changing HTTP(S) Settings
HTTPS uses Transport Layer Security (TLS) technology to encrypt all traffic to and from the Legrand PDU so
it is a more secure protocol than HTTP. The Legrand PDU supports TLS 1.0, 1.1 and 1.2.
By default, any access to the Legrand PDU via HTTP is automatically redirected to HTTPS. You can disable
this redirection if needed.
To change HTTP or HTTPS port settings:
1. Choose Device Settings > Network Services > HTTP.
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