Encrypted/Secured Inter Node Communication (Cluster nodes)

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Anu Chandran

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Feb 23, 2022, 3:37:54 AM2/23/22

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Hi Team,

We are trying to configure a highly available VerneMQ driven MQTT messaging environment in Azure cloud environment. The cluster nodes resides in two different regions. How does the communication between the cluster node happens ? Does it use any encryption or is it feasible to ensure the inter node communication will be always secured ? Since the nodes are situated in two different azure regions, we would like confirm that all the traffic going between the regions are encrypted by default.

Please advise.

Regards,

Anu.

André Fatton

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Feb 27, 2022, 12:43:01 PM2/27/22

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Hi Anu,

VerneMQ internode traffic is not encrypted by default. You'd have to configure any "vmqs" listener to use an SSL cert, as well as configuring the Erlang distribution protocol to use TLS.

The reason for not encrypting is that a cluster is always on an internal (LAN) network. Clustering over WAN is usually not recommended (I do not know what "two different Azure regions" really mean in that regard, though).