How to 301 redirect IP to domain? Basically my site is accessible from abc.com and the relevant ip on which it is pointing

Create a default server block if you haven’t got one already with

server {
	listen 80 default_server;
	return 301 http://abc.com/;
}

If you already have a default server block, all you have to add is the return line.

This will redirect any requests that do not match a configured virtual host (server block in nginx)