hi @dwarfc
I don’t believe what you require is possible. You are using a shared hosting provider (timeweb.ru)
As such the provider owns your IPs (92.53.96.113 and 2a03:6f00:1:0:0:0:5c35:6071 )
The only way the provider can share this IP among multiple clients is using SNI.
https://www.ssllabs.com/ssltest/analyze.html?d=sotik24.ru&s=92.53.96.113&hideResults=on
So if you go to 92.53.96.113 you will get the message below. You cannot change this as the provider owns the IP. If you need to own the IP you will need to get a dedicated VPS rather than shared hosting.
The reason you cannot turn SNI on or off is because you are using a shared service and the provider owns this functionality.
If your provider is using HTTPS but not using SNI they will get certificate errors as the certificate served up by non SNI requests will be incorrect (your hosters certificate)
Almost every modern programming url library supports SNI by default so it’s more up to your payment gateway to code this correctly
For example: connecting using openssl
OpenSSL with SNI and IP - correct certificate
OpenSSL without SNI and IP - timeweb certificate
Andrei