CODEWITHSUNDEEP
snmpnetwork-printerssharp-snmp
RobDev
RobDev

Reputation: 45

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

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 ?

Upvotes: 1

Views: 303

Answers (2)

Lex Li
Lex Li

Reputation: 63264

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

https://docs.lextudio.com/sharpsnmplib/tutorials/device-discovery.html

Upvotes: 0

Dominik Pawlak
Dominik Pawlak

Reputation: 1380

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.'

Upvotes: 1

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