Asp.net GenericJsonWebHook behind load balancer - asp.net

I'm implementing the ASP.Net Webhook (GenericJsonWebhook) code and it does exactly what I want but requires an https connection. The server is in AWS and SSL termination happening at an AWS Load Balancer, with the "inside" connection being http. Anyone know how to override the https requirement other than downloading and altering the webhook source. (Yes, putting a certificate on the webserver is an answer but that's outside of scope at the moment)
thanks
Richard

Found it - Add MS_WebHookDisableHttpsCheck with a value of true to the config file

Related

Wrap external http url into https

I have url of some external service I need to integrate our legacy system with.
Our legacy system is using some sort of bridges (pre-defined connectors) to talk with external world.
And currently there is only web connector for https. But that external service is available only through http, i.e. no SSL on that end and we can not do anything about it.
So I'm wondering maybe there is some online service, which could wrap http url into https, some sort of public proxy or whatever, so I could get https url in a few clicks.
For now it's just a proof of concept project, so I'm trying to avoid installing any internal proxy in our network etc. Need just the simplest and the quickest solution, which would give me https url.
Thanks in advance for you help, guys.

Setting up SSL on AWS EC2

I'm trying to set up SSL on my wordpress site.
I've an EC2 instance running wordpress on nginx and ubuntu. Database running on RDS.
I've launched an application load balancer with listeners on ports 80 and 443 and attached the SSL certificate which I got via ACM. I've set my targets to point to the EC2 instance I am using.
At this point the how-to guides and information stops. Apparently that's all there is to it and it should now all be working. However it's not. I'm getting connection refused errors when I add the https to my site's URL.
When I put my URL into https://www.sslchecker.com/sslchecker I'm told that no certificates are found.
So clearly I need to something more to get this working - can anyone point me to the next step?
Using the ELB and ACB is the way to go here. It sounds like you might be using the wrong type of ELB though. You mentioned application load balancer, you should use a classic load balancer. Also make sure your security groups are setup correctly to allow your ELB to talk to the EC2 instance.
You didn't mention Route53 but I assume you have the DNS entry setup to point at the ELB as well.
Share more and I will help more. Good luck.

Can not access the website via SSL

We have deployed our website to the live webserver, Windows Server, IIS 7.5. Website asp.net, .NET 4.5
I have configured the website bindings to allow https requests for this website.
Asked the hosting provider to open up the port 443.
I can access the website over internet with port 80, no issues at all. (http://mysite.com)
But I can not access via https, (https://mysite.com).
But I can access the site via SSL from the server itself, that means SSL configurations are fine.(https - localhost)
But I can telnet (telnet mysite.com 443), it responds to GET request via telnet.
I have rechecked the certificate and changed it to a self-signed certificate, issue is still there.
These requests not being tracked in IIS logs as well, seems like the request is not reaching IIS. Hopefully something goes wrong before it reaches the server.
But, when I access the website as http://mysite.com:443, it works.
I m bit confused with this behaviour. Obviously the port 443 is open by the hosting company. But something is wrong with requests over HTTPS, which is supposed to send a request to port 443. Please help.
Because your site is working when you access http://mysite.com:443, I am almost sure that you created wrong binding on IIS. Instead of selecting https from combo box you selected default http.
There is a tutorial on how to do this on youtube: Changing IIS 7.5 Bindings by David Johnson
You've establish that the port is open and the hostname binding is there, otherwise http://mysite.com:443 would not work. Its the SSL part that's not working, hence you can connect directly by port and telnet (port 443 but not SSL) but not a browser via https. It's only a browser connecting to a https url that will expect SSL.. I'm pretty sure I've had the same issue, but cannot recall the exact cause but it was definitely related to an invalid SSL configuration or SSL binding.. The behaviour was like there is no connection, nothing, which is unusual, its the bad config causes the browser to abort the connection. If I remember what, I'll update or comment below.
So you can access the site using https://localhost? Your question is not quite clear on this point... what is the exact URL you are using? If it's https://localhost, that is actually an indication that your certificate is configured incorrectly. You seem to be interpreting this as an indicator that it's working OK and that is not the case. The domain name is tied to the certificate and SSL will work only when accessing the site using that domain name. So if it works for "localhost", something is wrong.
Finally I found the solution. Issue was a setting in the load balancer of the hosting provider. I have asked the question from them and they have figured out the issue. Anyways it was a good learning curve for me. And this knowledge is going to help others.
The firewall was already allowing both HTTP/HTTPS, which is why we could telnet through and run a GET / and still pull down content from the 404 page of the IP address.
It appears there was a certain profile applied to the HTTPS configuration in the load balancer which would only work for HTTP, so they have disabled that.
When they set this up for HTTP and HTTPS they were not able to test HTTPS, because to do so would require an SSL certificate in IIS - which it appears we have already provided.
Thanks everyone for your help on this!

Getting client values of IIS Server Variables in Load Balanced Environment

I have an intranet ASP.NET web application in which I need to get the IP of the client's machine. I do this vis the following code:
HttpContext.Current.Request.ServerVariables.Item("REMOTE_HOST")
It used to work when my ASP.NET site was only hosted on a single server. However once we got the load balancer installed and migrated our apps to a web farm, the code above returns the IP of the Load Balancer device and not of the client anymore.
I am working with the networking folks to determine what can be configured differently with the load balancer, but in the meantime I was wondering if there was another way I could get the client's IP other than using that IIS Server Variable? Or any other suggestions?
Thank you!
Which load balancer are you using? It sounds as if your load balancer is acting as a proxy for the web traffic, hence the reason the source appears to come from the LB. Most hardware load balancers are built on Linux platforms and there is provision for transparency if the kernel supports it:
http://www.mjmwired.net/kernel/Documentation/networking/tproxy.txt
However, this would probably require root access to the unit and some downtime. But it is something that may be worth mentioning to the vendor's support team if they don't have any ideas.
Another (hopefully much easier) option: You may be able to configure the load balancer's proxy to write the client's source IP in the HTTP x-forwarded-for header:
http://en.wikipedia.org/wiki/X-Forwarded-For
And then you'll be able to read this header via ASP.net in a similar way:
Request.ServerVariables("X-Forwarded-For")
This may already work if the proxy is already doing this.
Really your options depend on what your load balancer is capable of, and what is configurable. Note the list of common hardware vendors at the bottom of the wiki page above.

How to set up SSL in a load balanced environment?

Here is our current infrastructure:
2 web servers behind a shared load balancer
dns is pointing to the load balancer
web app is done in asp.net, with wcf services
My question is how to set up the SSL certificate to support https connection.
Here are 2 ideas that I have:
SSL certificate terminates at the load balancer. secure/unsecure communication behind the load balancer will be forwarded to 2 different ports.
pro: only need 1 certificate as I scale horizontally
cons: I have to check secure or not secure by checking which port the request is
coming from. doesn't quite feel right to me
WCF by design will not work when IIS is binded 2 different ports
(according to this)
SSL certificate terminates on each of the server?
cons: need to add more certificates to scale horizontally
thanks
Definitely terminate SSL at the load balancer!!! Anything behind that should NOT be visible outside. Why wouldn't two ports for secure/insecure work just fine?
You don't actually need more certificates at all. Because the externally seen FQDN is the same you use the same certificate on each machine.
This means that WCF (if you're using it) will work. WCF with the SSL terminating on the external load balancer is painful if you're signing/encrypting at a message level rather than a transport level.
You don't need two ports, most likely. Just have the SSL virtual server on the load balancer add an HTTP header to the request and check for that. It's what we do with our Zeus ZXTM 5.1.
You don't have to get a cert for every site there are such things as wildcard certs. But it would have to be installed on every server. (assuming you are using subdomains, if not then you can reuse the same cert across machines)
But I would probably put the cert on the load balancer if not just for the sake of easy configuration.

Resources