nginx-ipbased.conf

# https://www.tecmint.com/nginx-name-based-and-ip-based-virtual-hosts-server-blocks #
# https://linuxconfig.org/configuring-virtual-network-interfaces-in-linux #

# /etc/nginx/sites-available/ or /etc/nginx/sites-enabled/
# *
# http { #

    # include mime.types; #

    server {

        listen 127.0.0.1:80;
        server_name site1.example.com;
    }

    server {

        listen 127.0.0.2:80;
        server_name site2.example.com;
    }
# } #

# /etc/hosts
# *
# 127.0.0.1 site1.example.com
# 127.0.0.2 site2.example.com