Networking

The Networking forum covers all aspects of Networking in Azure, including endpoints, load-balancing, network security, DNS, Traffic Manager, virtual networks, and external connectivity.

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  • If you have any feedback on any aspect of Azure relating to Networking, we’d love to hear it.

    How can we improve Azure Networking?

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    1. Create a windows service on the client to insert route tables for P2S client

      Please improve the p2s client so that a windows service with admin rights will insert the route tables. We could then deploy this without the user requiring admin rights.

      1 vote
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      • To have the possibility to set radius timeout on the VPN gateway point to site confguration

        When using the new radius authentication feature on Azure VPN Gateway it would be nice to be able to control the timeout to the radius server. This would make the usage of Azure MFA for VPN authentication possible. (IT works now if users are very fast at answering the phone)

        1 vote
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        • Ability to specify two RADIUS servers

          Ability to specify two or more radius servers in the P2S config for Azure VPN. Round robin by default if one fails.

          3 votes
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          • Migration of VPN Gateway from old to new SKUs

            Please provide risk mitigation ways to migrate from legacy VPN gateway SKUs to the new gateway SKUs. Currently, the only way is to delete everything and recreate it again.

            6 votes
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              Thanks for the suggestion. This is something we are looking into. But no downtime migration will be very challenging due to current platform constraints. We will likely need to take a phased approach with some downtime involved (maintenance windows required) while trying to preserve VPN gateway public IP addresses. Please stay tuned.

              Thanks,
              Yushun [MSFT]

            • P2S IP address leasing

              Currently our P2S model uses a predefined address space, and then VPN clients are assigned an address out of that pool.

              This is pretty standard.

              What I would like to see is an option to apply lease times to those IP addresses, the same way DHCP normally functions. The reason being most of our VPN connectors are cellular dial-in clients, and they suffer brief disconnects.

              Each time they disconnect and reconnect they receive a new IP address, and we have a service running that then has to re-establish where the client's listener port is, and do a bunch of housekeeping…

              1 vote
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              • Add option to connect or disconnect vpn

                In ASM model, we have an option to connect or disconnect an vpn connection. Now in arm model if we need to disconnect a vpn we need to delete the connection and if we need to connect the vpn we need tonrecreate thw connection

                28 votes
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                • BGP Peering IP modification on different subnet

                  Hey,
                  For business purpose, we wanna offer an idea of selecting peering IP from non-GW subnet while using Azure VPN BGP. this IP was currnetly allocated from ge subnet. but we wanna change to specific IP . let's say our address space range is 10.0.0.0/16, but our GW subnet is 10.0.0.0/24, Peering IP is 10.0.0.254. but one of subnet is 10.13.100.70/28, we wanna change peering IP to 10.13.100.70. but this is impossible, could we make some changes in further?

                  1 vote
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                  • configurable MTU

                    I've seen several conflicting recommendations for IPSec tunnel MTU/MSS.

                    First and foremost, publishing this (preferably inside the tunnel slice/pane) is a good first step, since it'd allow us to know definitively what we can do.

                    Second, and more significantly, I'd like to be able to CHANGE it... preferably by increasing the size... it seems that every time I turn around, the MTU needs to shrink - I'd rather leverage jumbo frames to allow higher throughput.

                    13 votes
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                      Hi Scott,

                      Thanks for the feedback – totally understand the pain points and confusion. There are a couple of constraints on the Azure side and also specifically with VPN. The key issue is this is for packets coming over the Internet which we can only assume total packet size of 1500 bytes max. Azure SDN platform performs additional encapsulation on the packets within our datacenter networks, so it will be subtracted from there.

                      1. On the Azure VPN gateways, the recommendation is to set TCP MSS clamping to 1350; or if not possible for your device, then set MTU to 1400 bytes on the IPsec tunnel interface. We had updated/clarified the Azure documentation to call that out.

                      2. Changing MTU currently is not possible from the Azure VPN gateways. We will take it into configuration, but it will not be possible in the short term due to the scale…

                    • Allow native VPN S2S from Azure to AWS

                      Azure coexistence with AWS (and even GCP) is a very common scenario. Currently the only way to connect Azure and AWS is using a combination of Azure Virtual Network Gateway with a VM (Strongswan, OpenVPN, RRAS) deployed in AWS. We have no documentation around it, while Google provides VPN interoperability guidelines (here: https://cloud.google.com/compute/docs/vpn/interop-guides).

                      This is complicated to manage when you add things such as High Availability and all the required configuration. Also, these manual configurations are never the most optmized.

                      I understand we have a few different parameters vs. AWS and that's why Azure can't set up this S2S…

                      12 votes
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                        Thanks for the suggestion – this will require the new Azure VPN gateway SKUs to add IKEv1 support. It’s under review but will be in the longer term roadmap. For the short term, please leverage virtual appliances from Azure Marketplace to facilitate this connectivity.

                        Thanks,
                        Yushun [MSFT]

                      • Provide certificate-based authentication for S2S VPN

                        Can you describe the technical reason why you decide not to offer this option when creating a s2s vpn and you offer only the phase1 pre-shared key method? The communications in Madrid HC Region are administered by Cesus and they follow directives from the Security Group of Madrid Digital (former ICM). In their form to require a s2s vpn only cert based is accepted for ipsec tunnels and without a clear technical reason it is almost impossible to negotiate an exception to shift to pre-shared key based phase 1 vpn

                        1 vote
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                          Thank you for the suggestion. The key reasons for not offering cert-based IKE authentication is due to the additional compliance requirements and validations related to handling certificates. As a result, this is currently not on the roadmap.

                          If certificate-based authentication is a requirement, currently customers will need to leverage a VPN appliances available from Azure Marketplace.

                          Thanks,
                          Yushun [MSFT]

                        • Allow special chartacters in the pre-shared key for IPSec VPN tunnels

                          Allow special chartacters in the pre-shared key for IPSec VPN tunnels

                          8 votes
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                          • Support for gateway diagnostics in ARM

                            The only way to get diagnostics logs from a VNet gateway is via ASM cmdlets. CSP subscriptions do not offer any support for ASM, so troubleshooting is impossible. Please add native support in ARM for retrieving logs from a VNet gateway

                            144 votes
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                              Thank you for your suggestion. We currently have something in the Portal called “Resource Health Check” under “Support + Troubleshooting” within your Gateway. It will check the health of your Gateway and try to determine the cause of an unhealthy Gateway. We understand how important this is, and are working on further improvements to monitoring and diagnostics.

                              Thanks,
                              Bridget [MSFT]

                            • Point-to-site VPN authentication support for Azure AD

                              Instead of only requiring on a certificate for authentication in Azure VPN Point-to-site solutions, it would be nice if the Azure networking team would consider adding support for username (UPN) and password that is authenticated against either Azure AD or ADFS.

                              72 votes
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                              • Support CIDR in Point to Site Networking (RFC1918 bug)

                                Azure forces clients to have a class A default route when using 10.x.x.x as their internal network. This should reflect the subnet mask illustrated in the portal

                                More information:

                                http://serverfault.com/q/818383/51457

                                7 votes
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                                • VPN Gateway monitoring

                                  It would be great to have monitoring options in the azure portal which would show the bandwidth usage and throughput charts. It would help in figuring out if the 100mbps limit of the standard gateway sku is being hit at peak loads. If the details can be further provided for each individual site-to-site or point-to-site connection then that would be great thing to have. It would help immensely in finding out which connection is hogging the bandwidth the most.

                                  320 votes
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                                  • Gateway upgrade notification

                                    As per my understanding Azure does notify the customer on few of the events like a storage maintenance or a VM maintenance, etc but the gateway is not in the list as of now.

                                    It would have been nice if Azure notified the stakeholders before such a gateway upgrade was due to occur in advance. Alternatively if that wasn’t possible, then at the very least the stakeholders should be notified that their Site2Site VPN tunnel is down post upgrade.

                                    6 votes
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                                      Thank you for your feedback. Alerting for gateway connectivity is a common ask, so it is on our roadmap.
                                      As of now, you can check connection status of your tunnel via the PowerShell cmdlet Get-AzureRmVirtualNetworkGatewayConnection.

                                      Thanks,
                                      Bridget [MSFT]

                                    • provide troubleshooting features to VPN gateways

                                      Until Microsoft improves the Azure VPN technology, it would be good and sometimes necessary to provide some VPN troubleshooting tools on the Azure side. The local side logs sometimes are not enough and it gets very difficult to understand the reason of tunnel outages. This feature will also be definitely useful once the Azure VPN technology will be completely stable and reliable, in order to analyse traffic and build monitoring based on it.

                                      5 votes
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                                        Thank you for your feedback. You provide a very good point; and this is in planning. We apologize for not having an ETA for you. We will get back to you with more details when we are closer to shipping.

                                        Thanks,
                                        Bridget [MSFT]

                                      • Monitor Virtual network Gateway bandwidth

                                        We want to monitor the bandwidth usage of Virtual Network Gateway.

                                        We all know that the virtual network gateway(VNG) with different sku have different bandwidth limitation. However , we can't monitor the usage or the current status of VNG.

                                        118 votes
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                                        • Set up a VPN device script Link as present in the Classic Portal

                                          I was setting up the Site to Site in New portal and found the link to download the VPN script wasn't present as in Classic portal. It would be good we have that link in new portal so that we can share that Network admins to setup site-site Connection with on-premise and Azure Vnet

                                          26 votes
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                                          • 28 votes
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