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.
Virtual Network:
Traffic Manager:
Network Watcher:
If you have any feedback on any aspect of Azure relating to Networking, we’d love to hear it.
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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
1,021 votesThank you for all the votes and feedback. We have started work on this and the capability will be supported soon. If you would like to get in touch with us to discuss your scenarios, please fill this form: https://aka.ms/ApplicationGatewayCohort
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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…
714 votesThanks for all your feedback so far. This is something we are looking to address relatively soon. Please stay tuned.
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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…
663 votesWe have started working on this feature and will announce this as soon as it’s ready.
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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.
450 votesThis is on our long term roadmap.
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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…
350 votesWe 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.
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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)
272 votesWe started working on this.
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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
SecRequestBodyNoFilesLimitThanks
Mark250 votesThanks for your feedback. This is planned as part of global waf configurable parameters.
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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…
248 votes -
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.
164 votes -
Support IPv6 in Application Gateway front-end public IP
Support IPv6 in Application Gateway front-end public IP
134 votes -
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
133 votesWe are reviewing increased limits. We have not finalized the supported size.
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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.
126 votesWe are still under consideration for this feature. In the meanwhile, could you use Azure CDN to accomplish this?
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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 instancesRegards,
Jan-Willem
123 votesThank you for all the votes and feedback. We have started work on this and the capability will be supported soon. If you would like to get in touch with us to discuss your scenarios, please fill this form: https://aka.ms/ApplicationGatewayCohort
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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.122 votes -
Support HSTS (HTTP Strict Transport Security) on Application Gateway
There are no support concerning HSTS today, this is requested by many customers and they have to use 3rd party for accomplish it.
101 votes -
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…
90 votes -
Allow ACL on Application Gateway for IP filtering via X-FORWARDED-FOR header
We have requirements from customers to restrict access via their company subnets. It would be very nice if the App Gateway supported not only the SSL offload but the ability to apply ACLs to allow or deny access via a defined network range using X-FORWARDED-FOR headers.
84 votes -
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).
83 votesThanks for your feedback. This is planned as a new supported RuleSet.
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Need a function to URL path rewriting in Application Gateway
Currently, I know Azure Application Gateway has a function for redirection of URL path based.
Now, I need a function for rewriting URL path during redirecting a request to backend server.
For example, When Application Gateway received a HTTP request to http://www.contoso.com/test/*, it redirects the request as /images/* to backend server.
In other words, I want to set a URL path for backend server in PathRuleConfig in Application Gateway.
74 votesThank you for all the votes and feedback. We have started work on this and the capability will be supported soon. If you would like to get in touch with us to discuss your scenarios, please fill this form: https://aka.ms/ApplicationGatewayCohort
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Support for header content size configuration
After many issues we run into an unsolvable 502 Bad Gateway error, simular to https://stackoverflow.com/questions/48964429/net-core-behind-nginx-returns-502-bad-gateway-after-authentication-by-identitys where the content size is too large in sign-oidc for open id connect post.
Please add support to edit the values that end up into nginx.conf
For now we cannot use the Application Gateway and looking into Cloudflare or Nginx Plus with WAF.
71 votes
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