User guide

RUGGEDCOM ROS
User Guide
Chapter 5
Setup and Configuration
Managing SNMP 167
Parameter Description
IP Address Synopsis: ###.###.###.### where ### ranges from 0 to 255
The Server IP Address.
Update Period Synopsis: 1 to 1440 min
Default: 60 min
Determines how frequently the (S)NTP server is polled for a time update.If the server
cannot be reached in three attempts that are made at one minute intervals an alarm is
generated.
4. Click Apply.
Section 5.7
Managing SNMP
ROS supports versions 1, 2 and 3 of the Simple Network Management Protocol (SNMP), otherwise referred to
as SNMPv1, SNMPv2c and SNMPv3 respectively. SNMPv3 provides secure access to the devices through a
combination of authentication and packet encryption over the network. Security features for this protocol include:
Feature Description
Message Integrity Makes sure that a packet has not been tampered with in-transit.
Authentication Determines if the message is from a valid source.
Encryption Encrypts the contents of a packet to prevent it from being seen by an unauthorized source.
SNMPv3 provides security models and security levels. A security model is an authentication strategy setup for
a user and the group in which the user resides. A security level is a permitted level of security within a security
model. A combination of a security model and level will determine which security mechanism is employed when
handling an SNMP packet.
Before configuring SNMPv3, note the following:
• Each user belongs to a group
• A group defines the access policy for a set of users
• An access policy defines what SNMP objects can be accessed for (i.e. reading, writing and creating
notifications)
• A group determines the list of notifications its users can receive
• A group also defines the security model and security level for its users
For SNMPv1 and SNMPv2c, a community string can be configured. The string is mapped to the group and
access level with a security name, which is configured as User Name.
The following sections describe how to setup and manage SNMP on the device:
• Section 5.7.1, “Managing SNMP Users”
• Section 5.7.2, “Managing Security-to-Group Mapping”
• Section 5.7.3, “Managing SNMP Groups”