Hello,
I'm trying to sens a SMS from a 4G router using a home-made program in .NET. I plan on using a sample code I found:
 

I can connect access the router, but when I try to login (using admin:password as credentials), I get a 403 error (forbidden).

I believe it must be a router configuration error, but I can't find which. The router is using the default configuration at the moment. I can however send SMS manually, but that won't fit my need.

Thanks in advance for your help