vaniivan

This plugin warns you of server IP address changes, so you can take care of Search Engine Visibility settings. 
This can happen if you move your database between development, staging and production environments, or on the first deployment of your site. 
It’s bad to keep robots.txt on for production, but could also be bad if you leave the robots.txt off on staging or development, 
since the whole staging.example.com domain could be indexed by Search Engines.
<h3>External Services</h3>
This plugin makes use of the http://ipecho.net service for external IP address resolution. More info here: https://ipecho.net/developers.html

A3 Robots Warning

Warns you of server IP address changes, so you can take care of Search Engine Visibility settings.

iRobots.txt SEO (IRSEO) is a fully customizable robots.txt virtual file generator. IRSEO creates a highly optimized and secure robots.txt file straight out of the box. Users may choose to enable or disable specific user agents, directories or files using intuitive options all of which include detailed instructions.
The robots.txt file is a text file located in the root directory of a website. It’s purpose is to direct user-agents (AKA bots) away from or towards specific files or directories. Inhibiting a bot from indexing specific pages will ensure your website remains keyword optimized and all indexed pages are relevant to your potential customers.
IRSEO also inhibits several WordPress system directories and files by default. Doing this ensures that the search bots do not include security sensitive pages within search results. For example, searching for “inurl:wp-content name size description” in Google will produce a list of sites with indexed and open content directories.
Note that IRSEO creates a virtual robots.txt file. This robots.txt file is displayed whenever access to the robots.txt file is requested.

iRobots.txt SEO

iRobots.txt SEO is a SEO optimized, secure and customizable robots.txt virtual file creator.

A3 Robots Warning vs iRobots.txt SEO