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Add support for SNMPv3 authNoPriv mode in PRTG

As a network engineer managing devices from ISPs and vendors with restricted SNMP configurations, I want PRTG to support SNMPv3 authNoPriv mode (authentication without encryption) so that I can monitor critical infrastructure devices that only allow this security level.

Currently, PRTG only supports SNMPv3 with authPriv (authentication + encryption). Many providers, e.g. Telekom, only offer SNMPv3 in authNoPriv mode.

Example configuration (as provided by Telekom, not changeable):
Mode: authNoPriv
Authentication Protocol: MD5
Privacy (Encryption): None

Since PRTG does not support authNoPriv, monitoring such devices is currently impossible.

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Lukas Dülk shared this idea  ·   ·  Report…  ·  Admin →
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  • AdminChristoph Franke (Admin, Paessler) commented  ·   ·  Report

    Hi there,

    please try the settings from the SNMPv3 screenshot in the sensor. That should make authNoPriv work, assuming the device is configured accordingly. So basically if no encryption key is provided, no encryption will be applied to the payload.

    Admittedly, this is not self-explanatory and will be changed in the future, but I hope you can successfully complete the technical configuration that way.