Digi WAN 3G User Manual page 21

Simple Network Management Protocol (SNMP)
Simple Network Management Protocol (SNMP) is a protocol for managing and monitoring
network devices. SNMP architecture enables a network administrator to manage nodes--servers,
workstations, routers, switches, hubs, etc.--on an IP network; manage network performance, find
and solve network problems, and plan for network growth. Digi devices support SNMP Versions 1
and 2. For more information on SNMP as a device-management interface, see "Simple Network
Management Protocol (SNMP)" on page 35. For a list SNMP-related of supported Request for
Comments (RFCs) and Management Information Bases (MIBs), see page 128.
Secure Sockets Layer (SSL)/Transport Layer Security (TLS)
Secure Sockets Layer (SSL)/Transport Layer Security (TLS) are used to provide authentication
and encryption for Digi devices. For more information, see "Security features" on page 25.
Telnet
Digi devices support the following types of Telnet connections:
Telnet Client

 Telnet Server
 Reverse Telnet, often used for console management or device management
 Telnet Autoconnect
 RFC 2217, Telnet Com Port Control Option, an extension of the Telnet protocol
For more information on these connections, see "Supported connections and data paths in Digi
devices" on page 27. Access to Telnet network services can be enabled or disabled.
Remote Login (rlogin)
Users can perform logins to remote systems (rlogin). Access to rlogin service can be enabled or
disabled.
Line Printer Daemon (LPD)
The Line Printer Daemon (LPD) allows network printing over a serial port. Each serial port has a
dedicated LPD server that is independently configurable. Access to LPD service can be enabled or
disabled.
HyperText Transfer Protocol (HTTP)
HyperText Transfer Protocol over Secure Socket Layer (HTTPS)
Digi devices provide web pages for configuration that can be secured by requiring a user login.
Internet Control Message Protocol (ICMP)
ICMP statistics can be displayed, including the number of messages received, bad messages
received, and destination unreachable messages received.
I n t r o d u c t i o n
2 1