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.

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    1. Support URL rewriting with Application Gateway

      PathBasedRouting is nice, but not super great without the ability to rewrite paths. I am trying to front a Service Fabric cluster, where multiple HTTP services live on http://+:80, at different path prefixes. Would be nice to use Application Gateway to direct https://api.company.com to http://cluster/api, and https://www.company.com to http://cluster/www

      1,143 votes
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      45 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    2. Allow Mutual SSL Auth on Application Gateway

      At the moment SSL termination is possible with Application Gateway but it doesn't cater for instances where client authentication is required (mutual auth). So if client auth is required, SSL needs to be passed through and terminated on each of the web servers. This increases load across the server farm and makes management of certificates more difficult since all certs need to be maintained on all servers. I believe this function is available with API Management but the additional cost is hard to justify if one doesn't require the other additional features. So having mutual SSL auth capability built into…

      1,001 votes
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      52 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    3. Application Gateway: Support wildcard hosts in listeners

      Our product creates dynamic DNS zones for our customers, e.g. foo.z1.contoso.com, bar.z2.contoso.com, etc. We use Azure DNS for this. (Notice that we stripe our customer's domains across multiple zones (z1, z2), because Azure DNS has a max record count of 5000.)

      So, to support this, we have a wildcard SSL certificate for each zone e.g. .z1.contoso.com, .z2.contoso.com.

      In order to have Application Gateway provide SSL termintation for us, we obviously need to create Multi-site listeners for port 443. Unfortuantely, the 'Host' field on the Multi-site listener does not accept wildcard entries. Furthermore, specifying the host name 'z1.contoso.com' does not appear…

      841 votes
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      32 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    4. Let's Encrypt Integration for HTTPS certificates

      It should be possible to define a list of SSL hostnames. Application Gateway should automatically acquire and renew certificates for all given hostnames (most probably through the HTTP domain validation process).

      For every request, Application Gateway should use the correct certificate based on the hostname.

      Supporting multiple hostnames is critical to use Let's Encrypt with multi-site routing.

      524 votes
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      3 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    5. Increase listener limit for Application Gateway

      Application gateway has a very low listener limit (20 listeners / certificates). This severely limits it's usefulness for multi-tenant/domain applications where a web farm / service hosts many endpoints. IIS itself has no such small limit, but due to constraints on certificate deployment in cloud services, Application Gateway is the only clear path to wide scale SNI based SSL hosting. With it's low limit, it does not come close to meeting our use case. I would suggest the limit be removed or set to a very high limit like 10k+ so many certificates could be bound to host many different…

      393 votes
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      23 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →

      We have raised the limit to 100 recently. We are regularly reviewing the limits and will continue to look for opportunities to raise the limits even further. If you have scenarios requiring limits higher than what is supported, please add your scenario details here (if you are comfortable with that) or raise an issue with Azure support and we will get back to you.

    6. Azure Application Gateway WAF Mode Increase Limit on SecRequestBodyLimit

      When we have the WAF set to prevention mode some of our HTTP post are denied with code 413.

      Request body no files data length is larger than the configured limit (131072).. Deny with code (413)

      Can you make these two settings configurable on the WAF?

      SecRequestBodyLimit
      SecRequestBodyNoFilesLimit

      Thanks
      Mark

      366 votes
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      17 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    7. Hibernate/pause a resource group or subscription

      After talking to one of your Senior Support Engineers, they suggested I made a feature request for this.

      I'd like to be able to pause, hibernate or otherwise stop a resource group or subscription so that it incurs minimal costs when not in use. I'm suggesting resource group or subscription as one may be easier to implement than the other. Ideally this would be done through ARM but I’d settle for doing it via PowerShell if needed.

      I appreciate that VMs can be deallocated but we found that a customer's solution was still using approximately £200 a month due to…

      366 votes
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      8 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    8. Enable Multiple IP addresses for Azure Application Gateway

      Azure Application Gateway is a nice Service for Load Balancing Layer 7 HTTP and HTTPS traffic. Today, we can only attribute one IP address (Public or Private) to the Application Gateway Deployment. It is fundamental that a Load Balancer can support multiple IP addresses to provide flexibility (Based on many customers feedback)

      319 votes
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      10 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →

      Support for both public and private IP at the same time is available on both V1 and V2 SKU. Customers can host multiple sites behind the same IP and port using multi-site listener today.

      Support for allowing same port on both public and private IP is in the roadmap.

    9. Authentication support for application gateway

      For lift & shift of legacy systems, application gateway is very useful as we have different kinds of backends (VMs, service fabric, other PaaS services, etc.). The only missing capability is authentication, so we have to implement and configure authentication in various services, which is a big overhead. Otherwise, we have to give up application gateway but set up Nginx VMs instead.

      I have also looked at Azure API Gateway, but it seems to be too specialized for public APIs but our services also service static contents and ever-changing private APIs without swagger definition.

      204 votes
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      3 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    10. Application Gateway V2 support of UDR

      Deploying a Application Gateway in a subnet with an UDR is needed in enterprise networks. For example if you advertise the default route from a ExpressRoute connection,.

      188 votes
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      6 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →

      Thanks for the valid suggestion. Your feedback is now open for the user community to upvote which allows us to effectively prioritize your request against our existing feature list and also gives us insight into the potential impact of implementing the suggested feature

    11. Insight in Azure application gateway performance

      Currently there is no way to view usage statistics of the Azure application gateway. Information I would like to see:


      • Per hour performance statistics (e.g. nr of connections, bandwith, CPU usage, etc.)

      • Advice on number of required instances based on metrics from last few days with recommendations to increase or decrease the number of instances

      Regards,

      Jan-Willem

      176 votes
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      4 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    12. WAF on Application Gateway needs a function to exclude some condition like a trusted node.

      Now, Web Application Firewall feature would be available as part of Azure Application Gateway.

      Currently, WAF on Application Gateway seems to not have a function to exclude from blocking access by any condition.
      So, I would like to request to add this function for WAF on Application Gateway.

      Acutually, Many WAF product could exclude particular access from blocking like a trusted node.

      178 votes
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      10 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →

      Thanks for the valid suggestion. Your feedback is now open for the user community to upvote which allows us to effectively prioritize your request against our existing feature list and also gives us insight into the potential impact of implementing the suggested feature

    13. Support IPv6 in Application Gateway front-end public IP

      Support IPv6 in Application Gateway front-end public IP

      163 votes
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      planned  ·  1 comment  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    14. Enable the use of Azure App Service Certificate with Azure Application Gateway

      Today, you have to manage your certificate yourself and provide to Azure Application Gateway a .pfx file.
      It would be great if we can have in Azure Application Gateway the same integration we have between Azure App Service and Azure App Service Certificate in order to handle the purchase, renewal, configuration and security of our certificates.
      As far as I know, the ASC team has done a seperate Resource Provider and it might be easy to integrate it with other services such as Azure Application Gateway.

      149 votes
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      triaged  ·  3 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    15. WAF file size limit to be increased

      Currently as the WAF limit is set to 100mb, we cannot process our large files which could hit 500mb for example.

      Can you please increase the WAF file silze limit? To possibly 1GB / 2GB

      148 votes
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      6 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    16. Is it possible to expose Azure blob storage via Application Gateway

      Expose Azure blob storage via Application Gateway.

      I would like to remove public access for Azure Blob and only make it accessible via virtual network. The Azure Application Gateway will be public facing which does the SSL termination and forwards the request to blob.

      This would allow scanning for malicious content via virtual appliances before content is stored in blob.

      145 votes
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      5 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    17. Monitor Application Gateway Load

      Provide a way to monitor Application Gateway CPU/Memory in order to track load. It's hard to know only based on current access/http errors when the WAF is under heavy preasure and we need to scale it up.

      144 votes
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      2 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →

      There is no plan currently to offer these system level metrics for Application Gateway Standard (V1). However, we are planning to offer more observability with our new Autoscaling version (V2) of Application Gateway/WAF. We already offer Capacity Units as a metric which gives you a sense of the traffic load on your Application Gateway. More are planned for V2. Please send in your specific feedback via https://aka.ms/ApplicationGatewayCohort

    18. Application Gateway WAF: update to OWASP CRS 3.0.2

      The 'OWASP 3.0' (3.0.0) WAF rule set generates a lot of false positives, even on random base64 payloads. The only option is to disable many rules.

      2 examples which frequently trigger on SAML authentication exchanges are 932140 (https://github.com/SpiderLabs/owasp-modsecurity-crs/issues/671) and 941120 (https://github.com/SpiderLabs/owasp-modsecurity-crs/issues/675).

      OWASP CRS 3.0.2 reworked some rules, in order to reduce some of these false positives. Please support CRS 3.0.2 (either as an in-place upgrade for 3.0.0, or as a new option).

      115 votes
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      12 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    19. Support chunked file transfers through Azure Application Gateway + WAF

      This is an issue with the WAF's configuration of OWASP.

      When the WAF is in protection mode, it is currently not possible to use the js File API to upload files in a chunked manner to an application behind the Application Gateway. Some of the "chunks" get blocked by the firewall (see attached). This doesn't happen to all chunks but it is common enough that a 100mb file will probably encounter the issue.

      I have created a barebones test website which reproduces the issue here: https://github.com/elexisvenator/AzureWAF-chunked-upload-test

      I have contacted the OWASP ModSecurity project, who have responded that the Firewall rule…

      109 votes
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      under review  ·  2 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
    20. Support server-sent events

      Azure Application Gateway apparently does not support server-sent events. This surprised me, since SSE really is just http. However after quite a bit of testing, and asking on the forum, I can confirm it does not.

      SSE is an arguably better way of doing server push than websockets, which is a lot more complex. We rely heavily on it, so hope it will be prioritized.

      Best regards,
      Alf

      103 votes
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      under review  ·  4 comments  ·  Application Gateway  ·  Flag idea as inappropriate…  ·  Admin →
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