How to configure SNMPv3 securely on Mikrotik RouterOS [Update]

May 11, 2014

In the last post I wrote on how to configure SNMPv3 for CentOS/RHEL/SL. I thought it might be a good idea to post the SNMPv3 configuration for various systems/devices – so this post is about Mikrotik RouterOS.

This time it is even easier than on Linux, just one line:

/snmp community set [ find default=yes ] name=snmpv3user security=private authentication-password=snmpv3authPass authentication-protocol=SHA1 encryption-password=snmpv3encPass encryption-protocol=DES read-access=yes write-access=no addresses=10.0.0.0/24

If you want to keep the default SNMP configuration and add just another, use this:

/snmp community add name=snmpv3user security=private authentication-password=snmpv3authPass authentication-protocol=SHA1 encryption-password=snmpv3encPass encryption-protocol=DES read-access=yes write-access=no addresses=10.0.0.0/24

But the RouterOS has also one weakness, it only supports DES and not AES. So the test command looks like this:

snmpwalk -u snmpv3user -A snmpv3authPass -a SHA -X snmpv3encPass -x DES -l authPriv 10.7.7.1 -v3

If you now look at the answer of a request in Wireshark you’ll only see encrypted text:

snmpv3answer

Update: Starting with RouterOS 6.16rc17 (2014-Jul-09 09:52) AES encryption (rfc3826) for SNMP is supported according to the changelog.

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