Access Security Guide K/KA/KB.15.15

When a security violation occurs on a port configured for Port Security, the switch responds in the
following ways to notify you:
• The switch sets an alert flag for that port. This flag remains set until:
You use either the CLI, menu interface, or WebAgent to reset the flag.•
• The switch is reset to its factory default configuration.
• The switch enables notification of the intrusion through the following means:
In the CLI:•
• The show port-security intrusion-log command displays the Intrusion
Log
• Thelog command displays the Event Log
• In the menu interface:
The Port Status screen includes a per-port intrusion alert•
• The Event Log includes per-port entries for security violations
• In the WebAgent:
The Alert Log includes entries for per-port security violations•
• The Intrusion Log lists per-port security violation entries
• In network management applications such as HP PCM+ via an SNMP trap sent to a
network management station
How the intrusion log operates
When the switch detects an intrusion attempt on a port, it enters a record of this event in the Intrusion
Log. No further intrusion attempts on that port will appear in the Log until you acknowledge the
earlier intrusion event by resetting the alert flag.
The Intrusion Log lists the 20 most recently detected security violation attempts, regardless of whether
the alert flags for these attempts have been reset. This gives you a history of past intrusion attempts.
Thus, for example, if there is an intrusion alert for port A1 and the Intrusion Log shows two or more
entries for port 1, only the most recent entry has not been acknowledged (by resetting the alert
flag). The other entries give you a history of past intrusions detected on port A1.
Figure 302 Multiple intrusion log entries for the same port
The log shows the most recent intrusion at the top of the listing. You cannot delete Intrusion Log
entries (unless you reset the switch to its factory-default configuration). Instead, if the log is filled
when the switch detects a new intrusion, the oldest entry is dropped off the listing and the newest
entry appears at the top of the listing.
Keeping the intrusion log current by resetting alert flags
When a violation occurs on a port, an alert flag is set for that port and the violation is entered in
the Intrusion Log. The switch can detect and handle subsequent intrusions on that port, but will not
log another intrusion on the port until you reset the alert flag for either all ports or for the individual
port.
Overview 409