>>>>> On Wed, 15 Apr 2009 13:32:37 +0800, Kang Chen <[email protected]> 
>>>>> said:

KC> When I want to receive a v3 trap using snmptrapd, I must assign the same
KC> engineid both in snmpd.conf and snmptrapd.conf.

KC> But, if I use MG-SOFT mibbrowser to receive the v3 trap, I need not to
KC> assign the engineid in snmpd.conf.

I assume you've read out tutorial on the subject?

  http://www.net-snmp.org/wiki/index.php/TUT:snmptrap_SNMPv3

KC> So, what's the reason?

If you're sending traps then the authoritative engine is the sender,
which means it should be the sender's engineID (IE, the agent's).  In
which case, you shouldn't need to put an engineID in the snmpd.conf
file.

Note that MG-SOFT's browser may be either:

 1) Not checking authentication and accepting every trap sent to it, in
    which case they're ignoring the engineID and receiving everything.
 2) remembering the password and converting it into a master key for
    every received trap and creating new V3 users for each incoming new
    engineID and then if it matches accepting the trap

-- 
Wes Hardaker
Please mail all replies to [email protected]

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