Azure Synapse - Private Link Hub - Implementation Guidance

Author: Ryan Royals

Summary

We recently did a bit of a deep dive on Azure Synapse Private Link Hub for private connectivity to Azure Synapse. Particularly with regard to customers with multiple workspaces.

Highlights Added July 17, 2024 at 11:02 AM

We recently did a bit of a deep dive on Azure Synapse Private Link Hub for private connectivity to Azure Synapse. Particularly with regard to customers with multiple workspaces. The key take aways are:
• Azure Synapse Private Link Hub is not at all tied to a Workspace
• When you create a private link from the hub, it gives you a private IP address and private DNS record for web.azuresynapse.net portal.
• Because you can only have a single DNS record for web.azuresynapse.net you can't create two hubs in a connected environment and have them be resolvable to all virtual networks.
• In a customer like HSS. If you put the Synapse Private Link Hub in a customer's spoke virtual network. Firewall restrictions will prevent other customers from accessing the Synapse Portal because they can't access things in other customers networks.
Therefore, you should
• Only deploy one private link hub in a shared / hub virtual network.
• This virtual network should be accessible (firewall rules) to all users / customers that require access to Synapse.
• You only need to create a single private link connection within the hub and link it to the shared / hub virtual network
• You should use DNS zones managed within the hub virtual network so that all users can resolve the name of web.azuresynapse.net
There are plenty of docs on it, none of which are overly clear:
• azure-docs/articles/synapse-analytics/security/how-to-connect-to-workspace-from-restricted-network.md at main · MicrosoftDocs/azure-docs (github.com)
• Azure Synapse Private Link hub. What is a Synapse Private Link Hub? | by Vijay K J | Medium
• Synapse Connectivity Series Part #2 – Inbound Synapse Private Endpoints – Azure Aggregator (wordpress.com) ([View Highlight] (https://read.readwise.io/read/01he21rrrbybwn5xmgh0zjsqa6))