I try to integrate a web app to a VNET. this is a brand new subscription.
According to : Integrate your app with an Azure virtual network
In the first step I wanted to check if the web app could reach out to VNET. The second step I want to connect the web app to SQL database through a Service Endpoint
I created a VNET with 2 subnets:
Jumpbox-subnet
integration-subnet
integration-subnet setting
There is service endpoint pointing to the integration-subnet. Also I integrated the app to the VNet, It's delegated the integration subnet.
I tried to connect to VM from App using tcpping 172.16.1.0 (jumpbox VM private address) from app console, but it failed.
I also app cannot connect to the sql database.
What are the missing pieces here, is a DNS server required to make this work?
Update (Resolved):
The question above was the key, It needs away to resolve the name with some sort DNS server.
tcpping default port is 80 and nothing was listening to that port in that box.
You could use the tool tcpping to test for TCP connectivity to a host and port combination.
The syntax is: tcpping.exe hostname [optional: port]
For example, run tcpping 172.19.1.10:3389
See troubleshooting app service networking for more details.
For more references, Here is an ARM example to deploy an app service with VNet integration and enable service endpoint Microsoft.Storage.
Related
I have 2 services running in a single private vpc subnet (same available zone). Each service is based on a container here: https://github.com/spring-petclinic/spring-petclinic-microservices .
I've setup route53 service endpoints for both services.
When I run my tasks (each within their own service) service A times out calling service B over service B's route53 endpoint. Using localhost doesn't work because these containers are in separate services.
When I create a container for my task definition, I assign the port that my container is using (using port mapping field). However I notice in the console there is this note: "Host port mappings are not valid when the network mode for a task definition is host or awsvpc. To specify different host and container port mappings, choose the Bridge network mode."
Since I'm using Fargate I am using awsvpc mode. So is this telling my port mapping setting isnt doing anything ? Is that why my services are timing out ?
Then when I google bridge mode, this seems to tell me that awscpv networking mode support service discovery: https://aws.amazon.com/about-aws/whats-new/2018/05/amazon-ecs-service-discovery-supports-bridge-and-host-container-/
So how does "bridge mode" work here ? Why does port mapping field not work for awsvpc ?
Edit:
I read this How to communicate between Fargate services on AWS ECS? and he just says "I created a new service and things started working." That's a bit disheartening.
Edit2:
Yes my vpc has enabled dns resolution.
As it turns out the security group on my service was only allowing http on port 80. That is the inbound rules the default SG that the service wizard gives you. I updated it to allow traffic on my container ports and they seem to be talking to each other now.
I have an Azure Virtual network and I connect to the network using Point-to-point with the VPN client downloaded from Azure. This works as expected as I can now RDP to VMs in the VNet if required.
I also have an Azure SQL Server instance and in the firewall section I have added the VNet above to the Virtual networks rule list.
With my work laptop, I was now hoping that I would be able to connect to the VNet using the VPN client and then be able to access the SQL database using SSMS. However, when I try and connect I get a message telling me that I cannot access the server and instead need to add my client IP to the Firewall rule list, which is what I was trying to avoid doing.
Is there something else I need to be doing here to get this working?
Is there something else I need to be doing here to get this working?
If you just use an Azure SQL Database, which is a Paas in Azure, itself is not located inside a VNet. You can directly add the client Public IP in the firewall of Azure SQL Server. Whereas this is not your expectation. You need to make it inside a VNet, then you can do these followings.
If you are using a SQL Managed instance which located inside a VNet, want to access the Database instance from on-premises with a private address, you need to make a VPN connection or ExpressRoute connection between the on-premise and the Managed Instance VNet.
Now, you have a P2S VPN connection, you still need to make VNet peering with Gateway Transit between the P2S VNet with SQL instance VNet. Note: To use remote gateways or allow gateway transit, the peered virtual networks must be in the same region. To do so, make the following very specific changes under the Peering settings.
In the VNet that hosts the VPN gateway, go to Peerings, then to the
Managed Instance peered VNet connection, and then click Allow
Gateway Transit.
In the VNet that hosts the Managed Instance, go to Peerings, then to
the VPN Gateway peered VNet connection, and then click Use remote
gateways.
Once the peering complete, you can check the status on the Azure portal. You need to remove the VPN client and re-download it and re-install it on your laptop, this will make the route update on your client side.
If you've established on-premises to Azure connection successfully and you can't establish a connection to Managed Instance, check if your firewall has an open outbound connection on SQL port 1433 as well as 11000-12000 range of ports for redirection.
For more reference, you can read Connect your application to Azure SQL Database Managed Instance.
I have a set up I would like to implement but just not sure on the details. As you can see in the image below I have a single VPS in the web which I would like to use as a gateway to a number of locally running web servers. Im using the VPN to hide the IP/location of the server farm while maintaining the ability to host locally.
What I am not sure on is the implementation as I have never used a VPN before. My understanding is that I can host the VPN server on the server farm, have the VPS connect to it which will give me another 'local' network interface which I can then use apache to proxy traffic through?
The server farm is basically a small Kubernetes cluster give or take a little.
Is my understanding correct and can you offer any advice on implementaion?
Thanks in advance!
server farm example image
The VPN server should have two network interfaces. The first is the public interface that connects to the Internet and the second is the local interface that connects to the server farm. All the servers in the farm should connect only to the local interface and have the gateway set as the VPN server.
You can use the Reverse Proxy functionality in Apache to route incoming traffic to the appropriate server. See Reverse Proxy Guide
This is my Azure configuration:
I have a Virtual Network with a couple of subnets and a gateway
configured to allow point-to-site.
There is one Virtual Machine with SQL Server (2014) installed. There
are some databases in there already. SQL Server is set up to allow
SQL Server and Windows Authentication mode. This VM is in the Virtual Network
I have an empty Azure Web App
I deployed my main MVC WebApp to the empty Azure Web App and looks good, except when it tries to retrieve information from the database.
Is it a connection string error? or there can be something else...
My connection string looks like this:
<add name="MyEntities" connectionString="metadata=res://*/Data.MyModel.csdl| res://*/Data.MyModel.ssdl| res://*/Data.MyModel.msl;provider=System.Data.SqlClient;
provider connection string="
data source=tcp:10.0.1.4;
initial catalog=MyDataBase;
persist security info=False;
user id=MySystemAdmin;
password=SystemAdminPassword;
multipleactiveresultsets=True;
App=EntityFramework""
providerName="System.Data.EntityClient" />
Here is the error thrown by the azure web app...
So it seems to be related to either the way I'm providing the connection string or the end-points/firewall configuration.
Check your connection string against this connection string for Entity Framework designer files (https://msdn.microsoft.com/en-us/data/jj556606.aspx#Connection)
Just from a quick glance I see two possible errors:
Semicolon missing added after provider=System.Data.SqlClient (the example on the page I provided the link to doesn't have one)
The IP address you specify to connect to is a local one (10.0.0.1) and should be the IP/DNS name of your database in Azure.
Not sure if this is the issue or if StackOverflow just clobbered your markup. In addition you talk about a lot of gateways so I would check to make sure you can talk between your systems. Finally posting error messages and capturing exceptions about what's actually going on will help diagnose the error because at this point it's all guesswork.
Hope that helps.
What the guys said above plus:
The Web App needs to have a hybrid connection to the VNET the VM is if you want to use the local IP address, otherwise you have to use the PIP.
Check the firewall on the VM if the proper ports are open. This has to be both on the VM firewall and the endpoints. Also, if there are any ACLs on the VM, you have to check those too.
The other answers gave me the guidelines to find out the solution.
I'll try to describe the steps I followed:
Using the new azure portal (portal.azure.com currently in preview) I
established a connection between the Azure Web App and the Virtual
network:
Home > Browse > Click on Azure Web App name
In the Azure Web App blade click on Networking tile
In Virtual Network blade, click on the Virtual Network where the database is located (it's important to mention that the Virtual Network ought to have a gateway previously configured)
My intention was to provide certain level of security to the VM with
the databases by placing it inside a Virtual Network, so I had not
considered opening ports. Turns out that it's necessary, so, in the VM:
I enabled the TCP/IP protocol for SQL Server using the Sql Server Configuration Manager (How to? here)
Then I created a new Inbound Rule opening the 1433 port, but only for private connections (very nice).
It was not necessary to create an endpoint in the VM for this port (very happy with this).
Finally, I published the the app to the Azure Web App using the connection strings as shown in the question (with internal database IP)
Final touch: in the new Azure Portal > Azure Web App > Settings, I was able to enter Connection Strings. Settings created in the portal are not overwritten; so now I'm sure this Azure Web App will always use the correct connection string.
Final note: in theory (not tested yet) the internal IP will not change as long as the VM is not Stopped (Deallocated).
Yesterday I created an Azure Virtual Machine using the simple Win2008r2 + SQL2008r2 image.
I have deployed a website to the VM via an RDP session.
I am able to browse the website locally (via RDP) using
"http://localhost"
I understand that I need to add an Azure endpoint for port 80 to enable me to browse to the site from an external machine.
I have configured the Windows Firewall on the Azure VM to allow traffic on Port 80 inbound and outbound.
Could anyone please advise what I've missed or what I can do to troubleshoot?
---Update-----
I have learned a little more this morning. The website that I'm trying to host on the VM is an installation of Interwoven Teamsite v7.3.x. When I looked in IIS I could see that the "Default Web Site" was stopped. Another website called "TeamSiteSitePubPreview" had been created but was only bound to port 81.
So, what was presenting the website I could see when I browsed to
http://localhost locally?
I ran netstat -ano and this showed me that PID 1604 what listening on port 80. I then ran Process Explorer which told me that PID 1604 was allocated to "Appache HTTP Server".
I know nothing about About Appache, can anyone tell me if there's some Apache config that will be preventing connections from outside of the local server?
For reference, I just tested this sequence and it gives you a website accessible over the Internet:
Create a new Windows Azure virtual machine with the Windows Server 2008 R2 SP1 image.
Add an endpoint on public port 80, private port 80.
While the endpoint is being created, start setting the server up.
Remote Desktop in.
Add the Web Server (IIS) role with default settings.
Test the connection. You should get a HTTP 200 OK status.
If you want to troubleshoot your server, start checking for errors in the event log. Check also the website bindings in IIS (Port 80, IP Address *).
Also consider the connection issue might be on the client (your) side. For instance, DNS caching. Try connecting from another machine with direct Internet connection (such as another cloud server) or from a service such as isup.me.
Additionally, if all you want is to host websites in IIS, the Web Sites service has a more streamlined experience.
You will need to create an endpoint on port 80 thru Windows Azure Management portal as well. This endpoint opens a port in the Windows Azure Load-balancer.
Navigate to your VM within the portal and create a new Endpoint under the Endpoints screen of VM configuration within Azure management portal.