How to configure snmp for snmp trap forwarding

snmp

I have tried adding the following to snmpd.conf:

trapcommunity public
trapsink finalsnmptrapdestserver public

I thought this should allow traps to be recieved with the community string public
and send any traps to finalsnmptrapdestserver with community string public. But traps do not seem to make it to my final destination.

Best Answer

Apparently snmptrapd needs to be used.

I created /etc/snmp/snmptrapd.conf with the following contents. Its not secure in any way but it did what I was wanting, though the problem I was originally trying to solve was not fixed. So back to the drawing board for me. But for anyone else wanting to proxy snmp traps a simple config.

authCommunity net public
forward default finalsnmptrapdestserver public

This will accept traps for forwarding with the community string public and forward all traps to finalsnmptrapdestserver with community string public.

Related Solutions

Looking for an automated method to install and configure SNMP on servers

For Windows Server 2008, you can use OCSETUP.EXE. See more at: http://support.microsoft.com/kb/936209

For Windows Server 2003, you can use SYSOCMGR. Put the following lines into a file (I'm calling mine "snmp.txt"):

[Components]
netoc = on
[NetOptionalComponents]
SNMP = 1

Then, call SYSOCMGR as an Administrator (or as SYSTEM-- this absolutely does work from an AD startup script):

SYSOCMGR /i:%SystemRoot%\inf\sysoc.inf /u:snmp.txt

(This assumes you're calling SYSOCMGR from the same directory as snmp.txt.)

I've done this all the time w/ Windows XP, and it worked fine in a VM that I just tested w/ W2K3. Be sure the Windows source files are accessible in the location SYSOCMGR looks by default or the install will hang asking for them.

Edit: Reversed /u and /i in command line example. I am an idiot!

Solution to route/proxy SNMP Traps (or Netflow, generic UDP, etc) for network monitoring

A co-worker just showed me samplicator. This tool looks to be just about a perfect solution what I was looking for. From the tool's website:

This simple program listens for UDP datagrams on a network port, and sends copies of these datagrams on to a set of destinations. Optionally, it can perform sampling, i.e. rather than forwarding every packet, forward only 1 in N. Another option is that it can "spoof" the IP source address, so that the copies appear to come from the original source, rather than the relay. Currently only supports IPv4.

It can been used to distribute e.g. Netflow packets, SNMP traps (but not informs), or Syslog messages to multiple receivers.

Best Answer

Related Solutions

Looking for an automated method to install and configure SNMP on servers

Solution to route/proxy SNMP Traps (or Netflow, generic UDP, etc) for network monitoring

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