How To Set Multiple IP Addresses on One NSG Rule in Azure Stack

2 Min. Read

Introduction

With the introduction of Augmented rules for Network Security Groups (NSGs) in Azure, you can define larger, more complex network security policies with fewer rules. Multiple ports, multiple explicit IP addresses, service tags, and application security groups can all be combined into a single, easily understood security rule.

Unfortunately, Augmented rules is not available in Azure Stack as of writing this article. Network security groups (NSGs) do not work in Azure Stack in the same way as global Azure. In Azure, you can set multiple IPs and Ports on one NSG rule (using the Portal, PowerShell, and Resource Manager templates).

How To Set Multiple IP Addresses on One NSG Rule in Azure Stack 2

In Azure Stack however, you cannot set multiple IPs and Ports on one NSG rule via the portal.

How To Set Multiple IP Addresses on One NSG Rule in Azure Stack 3

To check the difference between Azure and Azure Stack networking, I highly recommend to keep checking the following Cheat Sheet document.

Set Multiple IPs on one NSG Rule in Azure Stack

Now what if you have a little less than a hundred of IPs to add as whitelists, and a large number of protocols to open on Azure Stack, you can hardly do it by hand on each NSG rule.

The good news is, starting with Azure Stack Update 1903, you can set multiple IPs and Ports on one NSG rule using either Resource Manager template, PowerShell, or Azure CLI.

What about the Portal??? Well this is ‘technically’ possible to do it via the Azure Stack portal due to a bug.

To set multiple IPs on one NSG Rule in the Azure Stack portal, take the following easy steps:

  1. Add first an NSG rule (Inbound or Outbound) with multiple IP addresses and single port, wait for it to throw an error ! as shown in the following screenshot, and then switch to Basic. By default, when you add an NSG rule, the configuration will be in Advanced mode. How To Set Multiple IP Addresses on One NSG Rule in Azure Stack 4
  2. Once you are in Basic mode, you can click Add now. How To Set Multiple IP Addresses on One NSG Rule in Azure Stack 5
  3. One the rule is added, you can verify the multiple IP addresses are set as desired :)How To Set Multiple IP Addresses on One NSG Rule in Azure Stack 6

Unfortunately, you cannot add multiple ports range in the Azure Stack portal. This workaround applies only to Source and Destination IP address range. If you want to set multiple ports, then you need Resource Manager template, PowerShell, or Azure CLI.

Please note that this is not officially supported by Microsoft. It’s a workaround and hopefully Microsoft will address it in the near future.

Hope this helps!

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Thank you for reading my blog.

If you have any questions or feedback, please leave a comment.

-Charbel Nemnom-

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0 thoughts on “How To Set Multiple IP Addresses on One NSG Rule in Azure Stack”

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  1. Hi Charbel, thank you for article,
    I have a question. I have a list IP address that I want to allow access to multi VMs.
    First, I attach to 1st VM a NSG A which allows my white list IPs
    Second, I attach to 2nd VM a NSG B which allows my white list IPs
    In case I have to update whitelist IP, I need to update both 2 NSG A and NSG B.
    Are there any way allow me to update only 1 NSG, then other NSG apply it automatically?

  2. Thank you Hoang for the comment!
    Yes, you can update one NSG rules and have it applied on both VMs automatically.
    You need to look at Application Security Groups (ASG) in this case.
    Please check here and let me know if this solve your challenge.

    To minimize the number of security rules you need, and the need to change the rules, plan out the application security groups you need and create rules using service tags or application security groups, rather than individual IP addresses, or ranges of IP addresses, whenever possible.

    Thanks!

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