Redirect HTTP to HTTPS and Configure IP Whitelist in Nginx

To redirect traffic from port 80 to 443, add a server block listening on 80 and use a rewrite rule that permanently redirects to the same host over HTTPS.

server {
    listen 80;
    server_name oa.dalu.com;
    rewrite ^(.*)$ https://${server_name}$1 permanent;
}

For HTTPS, configure a server block listening on 443 with the appropriate server name, document root, and log files.

server {
    listen 443;
    #server_name default;
    server_name oa.dalu.com;
    root /data/web/;
}

To restrict access to specific client IPs, create a server block with an allow list and a final deny rule.

server {
    listen 80;
    server_name www.test.com;
    root /var/www/html/test;
    access_log /var/www/logs/access.log main;
    error_log /var/www/logs/error.log;
    allow 100.110.15.16;
    allow 100.110.15.17;
    allow 100.110.15.18;
    allow 127.0.0.1;
    deny all;
}