This means your website is accessible through domain and IP, both of which could cause duplicate content if the search engine indexes both URL and IP. Duplicate content is not good for SEO, and this is something you should fix it immediately if found. In this article, I will talk about how to test and fix IP canonical problems in Nginx and Apache webserver.
Test IP Canonicalization
You can either access your IP address manually to check if it’s getting redirected or use the following online tools to test.
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Fix IP Canonical issue in Nginx
Login to your Nginx server. Take a backup of nginx.conf file Create a new server block like below
Very obvious, you have to change the IP and domain name with yours. Restart Nginx, and you are all good now.
Fix IP Canonical issue in Apache
Login to your Apache server Take a backup of httpd.conf file Ensure mod_rewrite is enabled
Add following Rewrite rule
Make sure you change 128.199.100.xxx to your actual IP. This is one of the hundreds of SEO metrics, and if interested in more, you should analyze your website for SEO.
