Additional ports for Azure Databricks traffic to the control plane

Bratcher, Danny (Tarpon Springs) 25 Reputation points

RE: Important notice: We're opening new ports for Azure Databricks in April

Please elaborate on this:  need to ensure that no NSGs on your subnets block the new ports before 1 April 2024. The notice only mentions the 10 new ports: 3306 and 8443–8451. What protocol, source, and destination? We have the ports opened only for a source and destination of VirtualNetwork. Is that sufficient?

Azure Databricks
Azure Databricks
An Apache Spark-based analytics platform optimized for Azure.
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  1. BhargavaGunnam-MSFT 25,796 Reputation points Microsoft Employee

    Hello oscar van zelst, Bratcher, Danny (Tarpon Springs),

    Here, the only action required from your end would be to check the available Databricks NSGs and verify if any of these ports have been blocked. If these ports are not blocked on your end, then no further action is necessary.

    How to verify: Click on the NSG attached to the subnet:

    Look for outbound rules that deny traffic from VirtualNetwork sources to the AzureDatabricks service tag destination on ports 8443-8451 and 3306.

    I hope this helps.

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