Question

2626 intrusion log and port disabling not working when unauthorized MAC-address used

Asked by: hafka

Procurve 2626 switch.

I used the following command to allow access to a switch port 2 only from one MAC-address.

ProCurve Switch 2626(config)# port-security 2 learn-mode static action send-disable

Then I connect the host to the switch port 2.

Then I check the situation with following command:

ProCurve Switch 2626(config)# show port-security 2

 Port Security

  Port : 2
  Learn Mode [Continuous] : Static              Address Limit [1] : 1
  Action [None] : Send Alarm, Disable Port

  Authorized Addresses
  --------------------
  00a024-cc24e2

The MAC-address is now only authorized Address for that port.

When I put another host with different MAC-address to that port it should disable the port and notify it  by intrusion log.

The port does not go to disabled state (the light stays green on the front panel of the switch port).

However it does not disable the port nor notify the intrusion in intrusion log, but still it denies access to network.

What could be the problem, I would like the port to go to disabled state when intrusion occurs. Also I'd like to view the intrusion from intrusion log.

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Asked On
2008-04-24 at 05:27:41ID23349971
Tags

Hp

,

Procurve

,

2626

Topic

Network Switches & Hubs

Participating Experts
1
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0
Comments
5

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Answers

 

by: hafkaPosted on 2008-04-24 at 05:29:34ID: 21430034

I've also tried to restore factore defaults several times, it did not help.

 

by: jburgaardPosted on 2008-04-24 at 06:15:31ID: 21430418

In ftp://ftp.hp.com/pub/networking/software/Security-Oct2005-59906024-Chap09-Port_Security.pdf
I read page 9-31:
"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.
On a given port, if the intrusion action is to send an SNMP trap and then disable
the port (send-disable), and then an intruder is detected on the port, the switch
sends an SNMP trap, sets the ports alert flag, and disables the port. If you reenable
the port without resetting the ports alert flag, then the port operates
as follows:
  The port comes up and will block traffic from unauthorized devices
it detects.
  If the port detects another intruder, it will send another SNMP trap,
but will not become disabled again unless you first reset the ports
intrusion flag.
This operation enables the port to continue passing traffic for authorized
devices while you locate and eliminate the intruder. Otherwise, the presence
of an intruder could cause the switch to repeatedly disable the port"

so did you try resetting alert flags , such as
clear intrusion-flags

hth

 

by: hafkaPosted on 2008-04-24 at 06:47:11ID: 21430760

I've tried resetting the alert flags with menu-command and then selecting:

Status and counters => Port status

There are no intrusion alerts shown, but I've still checked intrusion log which is empty and used "Reset alert flags" action.

That did not help.

 

by: hafkaPosted on 2008-04-24 at 09:38:28ID: 21432734

I've updated the switch software from 10.31 to 10.50 and that resolved the problem. The release notes of the 10.50 version stated that there has been this kind of problem and it is now corrected.

 

by: jburgaardPosted on 2008-04-24 at 10:08:14ID: 21433001

:-)

20120131-EE-VQP-002

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