Allied Telesis AT-S63 - Manual (Page 108)

Chapter 5: SNMPv1 and SNMPv2c
108 Section I: Basic Operations
Setting the Authentication Failure Trap
As mentioned in the SNMP Overview section in this chapter, a trap is a
message sent by the switch to a management workstation or server to
signal an operating event, such as when the device is reset.
An authentication failure trap is similar to other the traps. It too signals an
operating event on the switch. But this trap is somewhat special because it
relates to SNMP management. A switch that sends this trap could be
indicating an attempt by someone to gain unauthorized management
access using an SNMP application program to the switch. There are two
events that can cause a switch to send this trap:
ˆ An SNMP management station attempts to access the switch using an
incorrect or invalid community name.
ˆ An SNMP management station tried to access a closed access
community string, to which its IP address is not assigned.
Given the importance of this trap to the protection of your switch, the
management software allows you to disable and enable it separately from
the other traps. If you enable it, the switch will send this trap if either of the
above events occur. If you disable it, the switch will not send this trap. The
default is disabled.
If you enable this trap, be sure to add one or more IP addresses of trap
receivers to the community strings so that the switch will know where to
send the trap if it needs to.
To enable or disable the authentication trap, perform the following
procedure:
1. From the Main Menu, type 5 to select System Administration.
The System Administration menu is shown in Figure 4 on page 60.
2. From the System Administration menu, type 5 to select SNMP
Configuration.
The SNMP Configuration menu is shown in Figure 20 on page 107.
3. From the SNMP Configuration menu, type 2 to toggle Authentication
Failure Trap Status between enabled and disabled. The default is
disabled.
4. After making changes, type R until you return to the Main Menu. Then
type S to select Save Configuration Changes.