I'm trying to get v3 security to work.  I can use -l authNopriv but -l authpriv gives 
"decryption error".  I don't understand that.  Cryptography isn't my strong suit; I'm 
using a network sniffer to look at packets and looking in the net-snmp source but 
haven't figured out what's going on.  Any clues would be welcome.

I'm using 5.1.1 and I've got this in my /usr/share/snmp/snmpd.conf:

  com2sec public default public
  view public included .1
  group public_v2 v1 public
  group public_v2 v2c public
  access public_v2 "" any noauth exact public none  none
  group public_v3 usm public
  access public_v3 "" any auth exact public none none

and this in my /var/net-snmp/snmpd.conf:

  createUser public MD5 "publicpwd" DES "publicpwd"

I know that the user is active because when I use only authentication, I get answers:

  $ snmpget -v 3 -u public -a MD5 -A publicpwd -l authnopriv ipm system.sysLocation.0
  RFC1213-MIB::sysLocation.0 = STRING: "The Location"

However, when I try privacy, I get an error:

  $ snmpget -v 3 -u public -a MD5 -A publicpwd -x DES -X publicpwd -l authpriv ipm 
system.sysLocation.0
  snmpget: Decryption error

If snmpget is having trouble DEcrypting, does that mean that it sent a request and got 
back a response it doesn't know how to decrypt?

TIA.

                             Chris



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