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SNMP Trap Watcher

SNMP Trap Watcher is designed to be used to receive SNMP Traps from network equipment, including routers, switches, and workstations. Traps are sent when errors or specific events occur on the network. Traps are normally only sent to end stations which are currently sending SNMP requests to the device in question, using applications such as SNMP Manager or HP OpenView. However, some devices can be configured to send Traps to specific management station addresses.

SNMP Traps are sent on UDP port 162, and SNMP Trap Watcher allows Traps to be filtered by string or by type (Enterprise specific or Generic). Using the 'Decode Window', and selecting a specific Trap from the list, a full decode of the Trap can be displayed. This option is more useful for debugging Network equipment which is in the early stages of development.

Main SNMP Trap Watcher Window
Main SNMP Trap Watcher Window

In normal circumstances, SNMP Traps would only be of interest to Network Managers or System Administrators.

Download SNMP Trap Watcher v1.41 (31K zip file) - last updated 28/5/2013

This software is provided as FREEWARE, and will run on any version of Windows. No install is necessary to run SNMP Trap Watcher, just download, unzip and run.

If this application simply does what you want, with no problems, why not consider funding BTT Softwares future development, by donating a small amount via PayPal?

Frequently Asked Questions

Q. What do the icons mean?
The E icon shows that the trap is enterprise specific, i.e. specific to the device that sent the trap. The G icon shows that the trap is a generic trap, as defined in the SNMP RFCs, and the I icon is associated with information traps. An X icon indicates an error of some sort.

Q. Can SNMP Trap Watcher listen on any other ports?
No, traps are normally only sent on port 162.

Q. How do I cure the message: Error binding to Trap Port (162), it may already be in use?
This means that another application is using port 162, this may mean that another SNMP trap receiver is active, and already using the port. To solve this problem, ensure that no other applications are installed to receive traps, this may include the Windows SNMP service, which can be configured to listen for traps.

Q. How do I enable email notification?
Versions of SNMP Trap Watcher before 1.36, displayed options to allow mail notification of received traps. This option has now been hidden if the system in question does not have the required DLL file (BTTMAIL.DLL). This file is currently not available.

Q. What command line options are supported?
There are two supported command line options, -h, which does not show the splash screen, and -hide which does not show the application at all. The -hide option allows SNMP Trap Watcher to be run as a hidden service, using one of the NT resource kit utilities, the -h option is implied when the -hide option is used.