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AuthorForum: PowerSNMP for .NET
Topic: SNMPv3 Agent Authentication not working on CF

From: Germany
Posts: 2
Member Since: 02/23/15
posted February 18, 2016 12:36 PM


I used your examples to create an SNMPv3 agent but apparently doesnt work. When I receive a set or get request with any invalid security parameters, my agent will still reply to the the request.

When initializing the objects:

new Passwords(auth_pass, auth_prot, priv, priv_prot));

selectedSecurity = new Security();            selectedSecurity.Username = user;      selectedSecurity.AuthenticationPassword = auth_pass;            selectedSecurity.AuthenticationProtocol = auth_prot;
selectedSecurity.PrivacyPassword = priv;            selectedSecurity.PrivacyProtocol = priv_prot;

then on the request received function: (exactlty like in the examples)

agent.Marshal(new RequestMessage[] { request }, null);
ResponseMessage response = agent.CreateDefaultResponse(request);
agent.Send(response, request.Origin);
if (response.ErrorStatus != ErrorStatus.Success)

when it didnt work, I tried to compare the received "security" manually, to create an error response myself, but it fails since the security object seems to come empty.

if (!((snmpVersion == request.Version)
 &&(selectedSecurity.Username == request.Security.Username)
&&(selectedSecurity.AuthenticationProtocol == request.Security.AuthenticationProtocol)
  agent.Marshal(new Exception("Auth error"));
  response = new ResponseMessage();
  response.ErrorStatus =    ErrorStatus.AuthorizationError;
  agent.Send(response, request.Origin);

Any Ideas?

Jamie Powell (Admin)

From: Rome, NY USA
Posts: 419
Member Since: 03/13/07

Extra Support Options
Custom Application Development

posted February 22, 2016 5:25 PM

Thank you for your post. A reply has been sent to you off-line, in response to your support email. Please let me know if you have not received this reply and I will be happy to resend.

All the best,
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