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SSH (Secure Shell) is a security protocol established on application and transport layers. SSH-
encrypted-connection is similar to a telnet connection, but essentially the old telnet remote
management method is not safe, because the password and data transmitted with plain-text
can be easily intercepted. SSH can provide information security and powerful authentication
when you login this device remotely through an insecure network environment. It can encrypt
all the transmission data and prevent the information in remote management from being leaked.
Following is the page of SSH.
Figure 7-9 SSH Page
Server Port:
Enter the server port. By default, it is port 22.
SSH Login:
Check the box to enable SSH Server. By default, it is disabled.
7.6 SNMP
The device can be configured as an SNMP agent.
SNMP (Simple Network Management Protocol), the most widely applied network management
protocol, provides a management framework to monitor and maintain Internet devices. Main
functions of SNMP include monitoring network performance, detecting and analyzing network
error, configuring network devices, and so on. When networks function properly, SNMP can
perform the functions of statistics, configuration and testing. When networks have troubles,
SNMP can detect and restore these troubles.
An SNMP consists of three key components: manager, agent and MIB (Management Information
Base). SNMP manager is a client program operating at workstation, assisting network
administrators to accomplish most network device management tasks. An agent is a network-
management software module that resides on a managed device and responsible for receiving
and dealing with data sent by managing device. Generally the managed devices are network
devices including hosts, bridges, switches and routers. MIB is the collection of managed devices.
It defines a series of properties of the managed devices. Every SNMP agent has its own MIB.