Hi,

Yes. Stunnel can do this, but in this case I don't think it will solve your problem. The issue is in the destination server and as far as I know in this case it can be circumvented from the client. If I understand well, this is caused by the fact that the server has a wildcard certificate with multiple vhosts configured with mismatched SSL settings.

Anyway, I understand all you need is to be able to send SMSs using the application the site web service. This can be easily achieved using curl from the command line or a small utility can be developed using libcurl. I have done this before and is my recommendation in this case. curl is included in windows. You can try this:

curl -v "https://api.interactsms.com/HTTP_API/V1/sendmessage.aspx?user=User1&password=Password1&api_id=9876&to=353879999999&text=HelloWorld&from=YourCompany"


You can read about the issue here:

mod_http2 - Apache HTTP Server Version 2.4



 How to Solve Frustrating 421 Misdirected Request Errors Forever 



Regards,
Jose


On Wednesday, August 7, 2024 at 06:36:46 AM GMT-5, <d.arlo.421642@gmail.com> wrote:


Thank you.  We have a software that can send to http only. I thought I could use stunnel to bridge this gap then lift it from http to https traffic.  Can stunnel do this? We don't own the destination so can't get destination private key. Alternatively I think I need reverse proxy such as haproxy?

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