Is there a way to know if a device has version 3 of SNMP enabled without the credentials?

Question

I need to do a device discovery which is working fine for version 1,2 because the community name by default "public" help me on this, but for the version 3 the credentials are required, do ou know any tool o method to know that ?

possible duplicate of [SNMPv3 Discovery](http://stackoverflow.com/questions/14523445/snmpv3-discovery) — Jolta, Dec 25 '14 at 20:01

score 1 · Accepted Answer · edited Oct 07 '21 at 11:39

1

As described in https://www.rfc-editor.org/rfc/rfc3414#section-4 you can send an empty v3 pdu. If the device supports v3 protocol it will respond (a report message) with it's snmpEngineID.

'This may be accomplished by generating a Request message with a securityLevel of noAuthNoPriv, a msgUserName of zero-length, a msgAuthoritativeEngineID value of zero length, and the varBindList left empty.'

edited Oct 07 '21 at 11:39

Community

1
1

answered Dec 24 '14 at 13:13

Dominik Pawlak

1,350
9
10

I found it on my own but it was very clear your answer, thank you. – RobDev Dec 31 '14 at 16:45

score 0 · Answer 2 · answered Dec 24 '14 at 13:58

0

@DominikPawlak already shows the RFC compliant approach. If you want some code sample, #SNMP has a sample called snmpdiscover,

http://sharpsnmplib.codeplex.com/wikipage?title=SNMP%20Device%20Discovery&referringTitle=Documentation

answered Dec 24 '14 at 13:58

Lex Li

60,503
9
116
147

Is there a way to know if a device has version 3 of SNMP enabled without the credentials?

2 Answers2