> From: Anthony Wright [mailto:[email protected]] 
> Sent: Thursday, April 16, 2009 12:43 PM

> If I have a manually generated snmpd.conf but no 
> automatically generated
> snmpd.conf (with the modified usmUser records)

        I think you meann that you have an snmpd conf file 
(/usr/local/snmp/etc/snmpd.conf) but no persistent data file 
(/var/snmp/snmpd.conf).

> when I start snmpd all
> requests to the server that use USM authentication timeout. If I stop
> snmpd & restart it without changing a thing the requests now complete
> successfully. The only difference is that the second time around the
> automatically generated snmpd.conf exists.

        How are you configuring your USM user?  Dollars to donuts you're 
putting createUser commands in the snmpd conf file instead of the persistent 
data file.

> Is there a good reason for this, or is this a bug? (I think 
> it's a bug,
> but I'm really struggling to get my head around USM authentication).

        I suspect misconfiguration.  From the manual concerning createUser:

[SNIP]
              Instead of figuring out how to use this directive and  where  to
              put   it   (see  below),  just  run  "net-snmp-config  --create-
              snmpv3-user" instead, which will add one of these lines  to  the
              right place.
[/SNIP]

        Sound advice.


        HTH,

Mike

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