Sticky session behind proxy for two apps - f5

He have two web apps: app A and app B. They are both installed in server 1 and server 2 (so one instance of A in server 1, one instance of A in server 2. same for app B). App A navigates to app B via SSO.
We use F5 load balancer to distribute the requests, and we are not sure on how to implement the sticky session in that case, as first, we cannot do IP based, as the are behind a reverse proxy, hence, the IP would always be the same.
Also, seems like the cookie option does not working when navigating from app A to app B.
(I am not a load balancer specialist... hopefully, I provided all info required).
Any advice on this would be greatly appreciated.
Design as below
--------------- server 1
| load balancer | ----> App A ->(SSO)-> App B
---------------
server 2
App A ->(SSO)-> App B
Thank you in advance!

Related

How to let Apple get logged into a closed environment on Citrix during app review?

Our organization and our environments run at closed environments (behind Citrix and no public access given to mobile apps connected to those).
We have developed a mobile app for iOS, for one of these environments, which runs also with Blackberry Dynamics as IAM. The question is related to the sign-in request of Apple during the App Review process for a mobile app.
Since we simply can not just open our environment to the public, we can not make the app accessible during app review (so they simply will not reach our server if they run the iPA). We are probably not the first organization who runs at closed environments and who experienced this issue.
I thougt self to;
1 - dynamic runtime urll; we can create sandbox environment and use this url and prod url behind another generic url of the loadbalancer or so. while in review we can forward traffic coming from the runtime url to sandbox env and after that we can toggle the traffic to prod url. this is compliancy wise hard to achieve within the organization.
Any more ideas without comprimizing our closed envs?

Azure SignalR understanding connection count

I am a bit confused with the Azure SignalR connection count. When I run my MVC.NET on my Visual Studio debug mode, it immediately creates 10 server connections. So, I carefully looked at the documentation (https://learn.microsoft.com/en-us/azure/azure-signalr/signalr-concept-messages-and-connections) and it said that
By default, each application server starts with five initial connections per hub, and each client has one client connection.
For example, assume that you have two application servers and you define five hubs in code. The server connection count will be 50: 2 app servers * 5 hubs * 5 connections per hub.
Well using the formula above, I should only have 5 connections because: 1 app server * 1 hub * 5 connections per hub = 5 connections. I can't understand why my portal showed that I have 10 server connections instead of 5.
Can anyone help to explain how Azure calculates the server connection?
Thanks...
UPDATE
For those who looking on how to enable Live Trace Tools:
Go to SignalR
Click on the SignalR that you want to trace
Click on Monitoring | Diagnostic Settings
If you haven't configure your log, click on "Configure Log Destination Settings" (Note: I think the cheapest way is to store under your storage account with retention of 1 day).
Tick Enable Live Trace and click Save
Open Live Trace Tool (it should say "Connected" on the top right corner)
Click on Capture
Start your app
Go to Diagnostics Settings under Monitoring tab in Azure portal SignalR service.
Click on "Open Live Trace Tool" button.
Click on Capture in newly opened window.
When you run your application, all connections would be shown in Live Trace.

Host page locally on iOS

I didn't know it was possible on iOS but lately I went to Japan and one of the free wifi apps wanted to install profile into my iPhone. When I confirmed installation it simply opened Safari with 127.0.0.1. It loaded some page and downloaded profile from there. How do I host some page on iOS?
Creating web server is nothing hard. It is lot of coding of course, but the principle is pretty easy.
There is lot of 3rd party libraries on the github (GCDWebService) just try to search for "ios http server"
To create it manually you need few steps:
1) With the help of CFSocketCreate you open new socket with specific port (standard HTTP 80, or secured one 443 should be forbidden without root access rights) what going to listen on network interface on incomming requests.
2) You need to prepare some receiver what will be triggered as soon as some request income. You can use NSFileHandle class and register NSFileHandleConnectionAcceptedNotification in your notification center. And allow background mode with acceptConnectionInBackgroundAndNotify method. But I recommend to read the manual first
NSFileHandle Apple documentation
3) Process the incoming request. The selector what you register is called and in NSNotification.userInfo property is the incoming request, and you can generate some page here and open it in safari, or in your app or do whatever you want.
4) If you want received some POST data or streams, there is needs to register NSFileHandleDataAvailableNotification what trigger selector as soon as some data to read are available.

AWS Lights DNS Zone Setup

I currently have an application server on AWS Lightsail that serving smartphone app. I had to make backend changes mostly security tweaks to secure API calls between the server and the app. The changes are still in my test server and the moment i apply them to production current users wont be able to communicate with the server. They will be logged out and required to update the app before login again. My problem is I cant really find a way to avoid service disruption and there will be downtime between the time I deploy the changes until my app update gets approved by Apple as Apple need a running server to test the app before they approve it. during that time my users who are using the old version wont be able to communicate with the updated server and that time would be 1-2 days which is something I cant afford.
My questions:
First Question
Is there anyway I can have DNS Zone setup and have both the old and new servers running and direct traffic coming from the old and updated app to the respective server? I have an initial thought that this can be done by using Route 53 however, i am not sure how to get this working.
Second Question
Do I need add a config file to the updated app to check the health of the server and communicate with accordingly?
Thank you in advance!

Push Notifications through BES/BIS , BlackBerry

I am trying to use push notifications for OS < 7.X .
I downloaded the sample server / client code. I deployed the client code on my device and the low-level-sample code on the tomcat provided.
For the record , when i registered for push notifications here i registered using the BIS option. Now that i was actually given a blackberry i was informed it is using BES ( i dont think though this is the root of the problem that i am going to describe..).
On the device , in the sample application i put all the correct settings given from the email i received.
Both my pc which is running the tomcat server and my phone are connected to the same wifi.
I am trying from the device browser to connect to the server , eg https://196.84.32.112:8443/low-level-sample
and the browser opens the page normally , meaning that i am able to connect to my server from the mobile.
Now when i hit register from the device sample app ( i have tried both BIS/BES options on the settings ) , i always get the following error :
Request to register failed. Cause by java.io.IOException: Network operation[Subscribe] failed. Make sure that Content Provider URL is accessible.
In the log i get :
Opening URL: my server url appended with info like username/password/model/connection type etc
Content Provider network command [ Subscribe] failed , caused by could not connect to 196.84.32.112:8443
Command "register" failed with error: java.io.IOException: Network operation[Subscribe] failed. Make sure that Content Provider URL is accessible.
A thought is that i should register again for new push keys and use the BIS/BES option instead of only BIS , but here the problem seems to be no connectivity with the local server , not the RIM server. I already tried to register though and i am waiting for the mail with the new settings.
Also i am a bit confused with the BIS / BES option. I have no idea if my users will have BIS or BES enabled so what do i put in my code ?! In the sample application it asks me to select between BIS or BES but when the app is going to production and i need to programmatically make that choice what will i choose?! Or this choice is made only for the evaluation/development of the app and on production there is another server ?
I think all the right things have been said here, but I'm hoping we can consolidate some of the answers, and wrap this question up.
You haven't shared your code, which makes things more difficult, but many people use the RIM/BlackBerry provided PushDemo source, where a connection suffix is hardcoded in /pushdemo/com/rim/samples/device/push/PushUtils.java:
private static String getConnectionSuffix() {
return ";deviceside=false;ConnectionType=mds-public";
}
I'm also guessing this from having read your other question.
By doing this, you've hardcoded the BlackBerry transport type of BIBS. BlackBerry supports many different transports, like BES, BIS, BIBS, or WAP. The BIBS transport will send the request from your device, out to BlackBerry's servers, which are on the internet. (Note: this part is probably confusing to an iOS/Android developer, since those platforms don't provide Apple/Google network intermediaries to relay normal HTTP/S traffic)
Then, the request is relayed to your server, which is at:
196.84.32.112:8443
I'm pretty sure that TCP/IP endpoint is not available from the Internet (I can't reach it). So, that's why it fails for you.
You can take this URL
https://196.84.32.112:8443/low-level-sample
and paste it into your BlackBerry device's browser, and it will work. Your device is configured for BES, which uses your company's internal servers. Those internal servers can reach the 196.84.32.112:8443 endpoint, so it seems to work for you. But, that's because you haven't hardcoded the transport, as you have in the push code that uses getConnectionSuffix(). The device browser is smart enough to figure out a transport that works, and BES works to reach that intranet server.
Hopefully, that explains the confusing part.
Solutions
As others have said, a solution is to get your company's IT people to make IP address 196.84.32.112 and port 8443 accessible through their firewall. That would allow the BlackBerry servers to reach it successfully.
Another solution would be to change the PushUtils.java code to avoid the BIBS transport:
private static String getConnectionSuffix() {
return ";deviceside=false";
}
If you want really flexible code, then I'd suggest rewriting that PushUtils.java code, because it appears to use the pre-5.0 HTTP connection logic. ConnectionFactory in OS 5.0+ makes this easier, and more robust, when supporting multiple transports ...
To answer your question about supporting users with multiple transports, take a look at this blackberry.com example, specifically the MyConnectionFactory class. It allows you to select which transports your app allows, and which it tries first.
Ultimately, the decision to make your server public or not depends on how it's going to be used, and whether you'll have non-corporate internet clients trying to register with your corporate server.
Let me first explain the registration flow for BB Push Demo:
When you click on Register the device will
Inform your web application that the device wants to register. For this it will send the information about the device to your Web Application (the so called ContentProvider). You are expected to store that information in your database. This step happens in the ContentProviderProtocol.performCommand() method of the push demo.
Inform the BB Push Server that the device wants to register for receiving push notifications from your application. This happens in the BpasProtocol.register() method of the push sdk.
Step 1 is only necessary if you want to know who all are registered for push notifications (maybe if you want to send individual push notifications to each device and not broadcast the message to all registered users). In that case, you will probably need other information like that user's preferences etc for customizing the push anyway.
Now the error you are getting is from the step 1. For step 1 to succeed, your device should be able to connect to your web app which it is not able to.
To solve this problem, either you have to make your web app publicly accessible (and be ready to handle the load) or comment out the step 1 from the app by making ContentProviderProtocol.performCommand() return without doing anything.
PS: The webapp used in step 1 need not be same as your push initiator. The webapp is simply being used for tracking who all is registered for receiving the push and should ideally be located in the cloud on a distributed architecture if you expect a lot of users.

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