301 redirect DNS issues - linux

Question

I think I screwed up something in my DNS configuration and now its bugging me for hours. Any help would be greatly appreciated.
I own a domain lets call it abc.com
Before all the issues happened DNS was configured in the following way at my registrar:
abc.com 'A' record Points to a wordpress server
www.abc.com 'A' record Points to a wordpress server
app.abc.com 'A' record points to amazon server.
We had a requirement where I had to achieve the following:
abc.com point to amazon server. //not the wordpress but amazon.
www.abc.com point to a wordpress server
app.abc.com point to amazon server.
*.abc.com point to amazon server
What I did to achieve this I believe is causing me all the issues. I went ahead and modified the DNS records in the following order
abc.com 'A' record points to amazon server. //earlier pointed to wordpress
www.abc.com 'A' record points to a amazon server
app.abc.com 'A' record points to amazon server.
I changed my nginx configuration in
such a way that
http://*.abc.com would always redirect to https://abc.com and I made the redirect permanent
server{
listen 80; # default;
server_name abc.com *.abc.com;
location / {
include proxy_params;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_headers_hash_max_size 8192;
proxy_headers_hash_bucket_size 256;
return 301 https://$server_name$request_uri;
}
}
After a while I realized I made a mistake as I wanted the www.abc.com to point to wordpres. So I went ahead and modified the DNS records again.
abc.com 'A' record points to amazon server.
www.abc.com 'A' record points to a wordpress //earlier pointed to amazon/nginx
app.abc.com 'A' record points to amazon server.
And whatever I do, the change to www.abc.com isn't reflected on the web. It just redirects to the amazon server. I tried it using different machines, installed browsers afresh still no luck.
I tried pinging abc.com and www.abc.com and they do point to amazon and wordpress (as configured in DNS), I even tried checking DNS propagation at whatsmydns.com and it shows the IPs based on my DNS conf. But I don't understand why they don't work in the browser.
I tried checking the redirect flow of the site at http://redirectcheck.com/index.php and it still shows 301 permanent redirect despite me going ahead and modifying the DNS records.
Any help would be greatly appreciated.

Answer 1

You've made what's called a "DNS propagation" - which can take up to 24 hours to take effect - Domain Names - How long do DNS changes take?
If 24 hours have passed, try Clearing the DNS Cache on Computers and Web Browsers