I have a app service published on Azure tha have some request in another server. Sometimes the client's server blocks me due to too many requests, taking a while to return to normal. Is there any way to merge the outgoing IP address of my requests without using a third-party proxy service?
Related
Is it possible to include a separate Azure App Service as part of another App Service?
For example lets say that I have a website called www.mycompany.com hosted in its own Azure App Service. I have another Azure App Service that I want to make it accessible by going to a specific URL in the first App Service.
So in other words when a request comes to www.mycompany.com/eu/ I want the content of this endpoint (/eu) to be served from the other app service. Would a load balancer work? The reason I want to do this is because the /eu endpoint has grown too big and I would like to separate that from the main site and host it on a separate app service. I hope my question is clear.
Thanks in advance.
For this purpose you could use Application Gateway.
In a certain sense it resembles a load balancer (it is a L7 LB indeed) as you indicated, but the product provides many additional features.
The following image, extracted from the product documentation, explains how it works:
Basically, as outlined in the aforementioned docs, when describing how an Application Gateway accepts a request (note they mention WAF in the explanation, an optional security threat prevention system):
Before a client sends a request to an application gateway, it
resolves the domain name of the application gateway by using a Domain
Name System (DNS) server. Azure controls the DNS entry because all
application gateways are in the azure.com domain.
The Azure DNS returns the IP address to the client, which is the
frontend IP address of the application gateway.
The application gateway accepts incoming traffic on one or more
listeners. A listener is a logical entity that checks for
connection requests. It's configured with a frontend IP address,
protocol, and port number for connections from clients to the
application gateway.
If a web application firewall (WAF) is in use, the application
gateway checks the request headers and the body, if present,
against WAF rules. This action determines if the request is valid
request or a security threat. If the request is valid, it's routed
to the backend. If the request isn't valid and WAF is in Prevention
mode, it's blocked as a security threat. If it's in Detection mode,
the request is evaluated and logged, but still forwarded to the
backend server.
The routing to one backend or another can be based on URL Paths:
You can find an example of this configuration in this related Microsoft article.
In your use case, you will need to define two backends, one for every App Service, and define routing rules as appropriate.
As indicated before, your DNS should point to the Application Gateway: it will handle the routing to one or other App Service based on the route, /eu/* or /*, provided by the client.
The order of the routes is important: once a rule is matched, it will be the one processed.
Application Gateway is a regional service: Azure Front Door leverages a similar functionality (and much more) globally.
Please, consider review the associated costs of these services.
I am answering my own question to hopefully help others in the same situation. This was simply done using a reverse proxy. This article explains everything you need to set it up - https://ruslany.net/2014/05/using-azure-web-site-as-a-reverse-proxy/
I want my web app to be able to send requests to another web app,
I have added the (Outbound) Public IP of the web apps to the mutual access restriction.
In Kudu Console, I use "tcpping" to test that the hostname of his web app is connected (443port).
But I execute my web app with postman and my web app is getting "Forbidden".
Later, when I executed curl in the Kudu Console of my web app, I also received 403 Forbidden.
And the Kudu Console of the other party's web app executes curl and displays 401,
In addition to Access Restriction, do I need to confirm any settings?
As HarshithaVeeramalla-MT said, it was later found that the outbound IP addresses of both parties were not complete, and all IP addresses of Additional Outbound IP Addresses need to be added to the Netowrking/Access Restriction before they can access each other.
Thank you.
I have a static website in Azure that's hosted using the blob storage account. I need to make requests from this website to services hosted in other domains. In order to handle CORS, I need to build a forward proxy server that handles the requests from client and forwards them to the requested service. Similarly, response from the services will be forwarded to the client. What is the recommended way to achieve this?
You can write an Azure Function (with consumption plan) using your favourite programming language. Just send requests from front end to the Azure Function, then once you get the reply from 3rd party servers, return it to the front end.
PS: use the Http Trigger binding
https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-http-webhook?tabs=csharp
I have been running a single container .net core web app on Azure using their preview single-container service for a couple of months.
It runs fine and Azure diligently proxies requests to the container from the web as expected - albeit with an important caveat.
What it doesn't do, to my chargrin, is proxy the requester's IP address to the container directly, it does this via an additional http header. This means that the backend code, which uses Application Insights for telemetry, is capturing the proxy's IP address (0.0.0.0) instead of the originating client's IP address.
This is clearly an oversight and is addressable via a pull request (since the Application Insights code is open source) - the problem I have is I'm missing important IP address information.
Does anyone know if there's a way to obtain this retrospective request/log data (at host level) from the Azure Portal?
I have an Azure app service and in some cases I need to send a web request to a non-azure webserver. What do I need to do to make it possible.
Currently the web request fails with no clear error message.
In response to a HttpClient Put request I get a System.Net.WebException exception which says there were errors.
THe same request works from a desktop application.
If your webserver is reachable from the internet you should be able to access it through your App Service. Try to log a ping to your webserver and google (8.8.8.8).
If your App Service is in a VNET you should enable some outbound rules to your webservers IP adress.
The server I am connecting to is an other Azure service. After some more investigating, It appears that I can connect to it if I do not use SSL (i.e. http://) but the connection is immediately closed when using SSL (https://). I assume that the problem must be related to the use of SSL.