vnet is connected to my Web App through which I can communicate with other services and applications. When I specify the internal IP of another application to my application, everything works fine. But now the task has come from the management to remake it to use the internal DNS server and internal DNS names. In Azure vnet, in the DNS servers settings, I specified the IP of my DNS servers. I added 168.63.129.16 - now work. If you connect Windows VM to the network everything works fine. Perhaps something needs to be added to the Dockerfile or Linux Container Web App settings so that integration with vnet and DNS works.
If your web application is integrated with the virtual network, your application would be able to communicate with the applications in the virtual network
After integrating your web application with the virtual network, you need to perform sync network action
Go to Azure portal --> Go to your App Service plan where the web app is hosted --> Under Networking, select Virtual Network Integration --> select Sync Network
Once the sync action is complete, you would be able to communicate with your internal application using the DNS name from your web application
Reference: Name resolution for resources in Azure virtual networks | Microsoft Docs
Related
I want to restrict access to my Azure Container App with an Api Management in Azure.
I successfully linked the Api Management with the Container App and I have activated a Subscription with an Api Key that will prevent public access over the Api Management Service Url. The problem, however, is that the Container App can still be accessed over the public Url of the Container App.
There is still the option to set the Ingress Traffic in the Container App to Limited to Container Apps Environment but then the Api Management will not have access to the Container App as well.
What is the correct way to properly secure the Container App behind an Api Management Service?
For Azure Container Instances, you don't have the option to configure IP restrictions similar to Azure App Services. Instead you will have to first create a virtual network and configure a Network Security Group to Deny all traffic from the internet and allow only from APIM, and then deploy your Azure Container Instance to this virtual network.
See here for deploying an azure container instance to a virtual network : https://learn.microsoft.com/en-us/azure/container-instances/container-instances-vnet
For configuring network security groups in your virtual network see : https://learn.microsoft.com/en-us/azure/virtual-network/manage-network-security-group#work-with-security-rules
You app service is still accessible over the public internet because you haven't configured Access Restrictions in your App Service's Network.
What you need to do is go to your App service. Then select Networking from the left menu and Turn on Access Restrictions for inbound traffic.
Create an access restriction rule to deny from the internet.
Next create a second acccess rule to allow access from the APIM. Ensure the priority on this one is higher.
Read the Microsoft Docs on how to set app service IP restrictions here : https://learn.microsoft.com/en-us/azure/app-service/app-service-ip-restrictions
Assuming your API management service has a static IP (not a consumption plan), you would need to use you own VNET:
Networking architecture in Azure Container Apps
Then using NSG, you could add an inbound rule to only allow traffic from the APIM service IP on HTTPS (TCP 443).
Azure container apps do now seem to have the ability to restrict inbound ip addresses
https://azure.microsoft.com/en-gb/updates/public-preview-inbound-ip-restrictions-support-in-azure-container-apps/
We have are looking at a similar architecture with a similar dilemma. Everything we have is secured with Azure b2c but if I want to make an internal container/microservice accessible to Azure Api Management I think I'd have to drop b2c (api management has no UI to log into b2c) and make it publicly accessible via the Ingress. If the inbound ip addresses are restricted to api management maybe that is ok. It does worry me that ip addresses can be spoofed although you'd hope Microsoft have thought of that.
Another alternative which I've not investigated but which does work for Azure functions is managed identities. This might not work at all with container apps though
https://www.svenmalvik.com/azure-apim-function-msi/
First, I think that it is good to explain networking architecture in Azure Container Apps.
Azure Container Apps run in the context of an environment, which is supported by a virtual network (VNET). When you create an environment, you can provide a custom VNET, otherwise a VNET is automatically generated for you.
There are two ways to deploy Container Apps environments:
External - Container Apps environments deployed as external resources are available for public requests. External environments are deployed with a virtual IP on an external, public facing IP address.
Internal - When set to internal, the environment has no public endpoint. Internal environments are deployed with a virtual IP (VIP) mapped to an internal IP address. The internal endpoint is an Azure internal load balancer (ILB) and IP addresses are issued from the custom VNET's list of private IP addresses.
I attach the image from Azure portal to show above two options:
Now going further, if you want your container app to restrict all outside access, create an internal Container Apps environment.
Now when it comes to deployment of the Container Apps to the Container Apps Environment, accessibility level you selected for the environment will impact the available ingress options for your container app deployments.
If you are deploying to an external environment, you have two options for configuring ingress traffic to your container app:
Limited to Container Apps Environment - to allow only traffic from other container apps deployed within the shared Container Apps environment.
Accepting traffic from anywhere - to allow the application to be accessible from the public internet.
If you are deploying to an internal environment, you also have two options for configuring ingress traffic to your container app:
Limited to Container Apps Environment - to allow only traffic from other container apps deployed within the shared Container Apps environment.
Limited to vNET (Virtual Network) - to allow traffic from the VNET to make container app to be accessible from other Azure resources or applications within the virtual network or connected to the virtual network through Peering or some type of VPN connectivity
Now in you case, what you are looking for is the architecture where you enable access to Azure Container Apps only through the Azure API Management. In this case you have to deploy Azure Container Apps Environment with Internal mode and set ingress traffic to Limited to VNet (Virtual Network).
I assume that Azure API Management can be accessible from the Internet. In this case you have to deploy Azure API Management inside an Azure Virtual Network. There are two possible modes: internal, and external. In you scenario, you can use external mode. More details can be found here. When API Management instance in the external mode, the developer portal, API gateway, and other API Management endpoints are accessible from the public internet, and backend services are located in the Azure Virtual Network.
Here I also attach the solution architecture to show how all these components are connected together. I also have Azure Front Door here but API Management is deployed with external mode. Please remember that you will also need private DNS Zone for your Azure Container Apps Environment domain, to make it possible to refer to specific APIs from the Azure API Management using URLs, example:
https://ca-tmf-mip-vc-api--v-01.blacklacier-cf61414b.westeurope.azurecontainerapps.io
Helpful links:
Repo with Bicep files to deploy Azure Container App with internal mode
Azure Container Apps Virtual Network Integration
I've created windows server virtual machine with active directory controller and my web app is communicating with it on public ip successfully (by ldap), but when i try connect to ldap on private ip (virtual network) it does not respond
to my Web app i have set VNet Configuration
my virtual machine network tab:
But it does not work when i try to connect to ldap://10.0.1.4:389
What should i do?
I can't even test my connection between webapp (by tcpping) and vm neither on public and private ip
i couldn't add to my webapp vnet integration on 10.0.1.0/24 because there was written that this subnet is already in use (or sth like that)
what should i type when i do vnet integration?
VNet Integration with Azure web app is required a dedicated unused subnet for the network connection. The subnet should be a subnet where no other resources like Azure VM located.
Your configuration is correct. You could follow these troubleshooting steps to verify if the VNet integration is working well. You can test via port 3389 on Azure VM. In my case, there is not a DC deployed on Azure VM.
However, please note that
There are some things that VNet Integration doesn't support, like:
Mounting a drive.
Active Directory integration.
NetBIOS.
Thus, I suppose Idap does not work with VNet Integration.
heh...
i've created second virtual network, and integrated web app with it...
next i have connected my second virtual network to first and... everything works great, ping's are < 1 ms...
that's a bit embarassing that it did not work when both web app and virtual machine were in one virtual network and i don't know why
I have a container (linux .NET Core) running in Azure. This application reads from Azure Service Bus and writes information in a database on-premises.
The connection to ASB is working fine but when the application tries to connect to SQL Server, I get a timeout. Initially, I was running the container with no network setup (the 'None' option). Then I went to public and it now gives me an IP address.
My infrastructure team added this IP to our firewall but either Azure is trying to access it with a different IP address OR the connection never leaves the Docker environment.
ps.: I have an App Service running (.NET Core API) and it does connect to the same SQL Server (same IP address) correctly.
Suggestions?
Since the IP address that outgoing from the Azure container group is random from Azure cloud IP list, you can not directly add its IP to the firewall. You can vote up this feature request for using the same exposed public IP for outbound traffic starting from the container group.
Currently, you could deploy container instances into an Azure virtual network, then the container could communicate with on-premises resources through a VPN gateway or ExpressRoute. For more details, you could see enable containers to use Azure Virtual Network capabilities.
I have a .Net Web API deployed as a Web App and am trying to connect it to a MySQL db on a VM in a virtual network, but it's responding with a 500 internal server error.
My VNET just consists of one VM with no DNS or site-to-site configuration.
The preview portal says VNET Integration is connected, my certificates are in sync and the gateway is online.
I gave my VM a static IP address which I'm using in my web.config connection string, thinking requests would be routed through the gateway to the VM, but according to my general mysql log their aren't any connection attempts to the mysql server.
The address I gave my VM is within the range of addresses being routed to the VNET, and I setup an endpoint on the VM for the port I'm trying to connect to mysql on with an access rule that allows all connections, so I'm not sure why the connection doesn't appear to be getting through the gateway to my VM.
You may check this link which provides instructions on how to connect Azure App Service - Web App with Azure Virtual Network, so that it can use resources visible within network itself:
https://azure.microsoft.com/en-us/documentation/articles/web-sites-integrate-with-vnet/
App Service supports three ways to connect to VNETs.
ASE - (App Service Environment) is a dedicated Cloud Service that includes all the needed pieces for App Service and as such can be joined to a VNET. A good starting point on ASE is this blog (https://azure.microsoft.com/en-us/blog/introducing-app-service-environment/).
Hybrid Connections - an agent based way to punch an application specific "wormhole" through network boundaries (https://azure.microsoft.com/en-us/documentation/articles/integration-hybrid-connection-overview/)
Virtual Networks - a way to "dial up" from an App Service App into an network (https://azure.microsoft.com/en-us/documentation/articles/web-sites-integrate-with-vnet/)
I have configured my Azure Web Apps and App Hosting Plan to connect via Point-to-Site gateway with my Virtual Network in Azure. I followed this article here:
https://azure.microsoft.com/en-us/documentation/articles/web-sites-integrate-with-vnet/
I have a VM that is hosting DNS and my Virtual Network is configured to use this.
I want to be able to reference services running in my Virtual Network from my Web Apps via domain name and not by direct IP address.
It works fine if I connect using the VM's internal IP address eg 192.168.1.4. But, when I add a DNS A record pointing my-service.my-vnet.local to 192.168.1.4, my web app can't resolve the domain.
I attempted to check the DNS settings of the web app and it appears my internal DNS server is not one of the hosts configured. Here's the code I ran in my web app:
from nic in NetworkInterface.GetAllNetworkInterfaces()
let props = nic.GetIPProperties()
select String.Join("; ", props.DnsAddresses.Select(x => x.ToString()))
Is this possible to do? If so, can anyone suggest what I need to do?
From everything we have tried and talking with Azure folks at Ignite, Web Apps (point-to-site) were not designed to be joined to a domain. That said, we are successfully using web apps to access on-premise web services using a binding with a fully qualified domain name (FQDN) and securing that traffic be certificate.
Due to the way web apps connected to a VNET works, you will not be seeing the DNS servers when you list all interfaces. If in command line you run the command:
SET WEBSITE_
You should see an environment variable that holds your configured DNS servers. If not, you should go to your web app in the Azure Portal, to the Vnet section, and hit the "Sync Data" button.