Is it possible to have two domains listen to 1 IP?

I have a server that hosts 2 websites (Website A & Website B) with 2 IPs (IP A & IP B).
Website A uses IP A.
Website B uses IP B.

I want to add a 3rd domain/website to IP B.

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I used this guide to add the third domain so that I'd have the Letsencrpt SSL cert immedinately - Using Centmin Mod acmetool.sh addon for Nginx HTTP/2 based HTTPS with free Letsencrypt SSL certificates

Is it possible to configure the 3rd domain to listen to IP B?

I tried but the 3rd domain keeps redirecting to Website B.

If it helps, IP A & IP B redirect to their respective websites when I enter them into the web browser. I don't see a default nginx centminmod page.

Or would I need to get a 3rd IP for the third website?

 

I see the second IP (IP B) there.

These are the guides I followed to set it up in the past.

But if I try to add another website to IP B (the IP defined in SECOND_IP via custom_config), when I visit the 3rd domain name it goes to Website B instead of the files I uploaded to the 3rd domain path.

https://community.centminmod.com/threads/rdns-and-spf.22359/#post-91590
In this post, Website A also sends emails from IP B when it really should be IP A.

Maybe I did something wrong?

 

I found the issue.

When I run the script from Using Centmin Mod acmetool.sh addon for Nginx HTTP/2 based HTTPS with free Letsencrypt SSL certificates

It deletes my domain.conf and changes it to domain.ssl.conf which has:

Code (Text):

listen IP-B:443 ssl http2 reuseport;

If I remove ssl http2 reuseport, Website C loads as intended. If I add it back, Website B loads instead.

What's the purpose of ssl http2 reuseport and do I need it for SSL?

 

Can confirm that only reuseport was the issue.