vaniivan

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


A3 Robots Warning

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

Processby

<p>The plugin allows you to create and edit the robots.txt file on your site.</p>
<h4>Features</h4>
<ul>
<li>Works with multisite network on Subdomains;</li>
<li>An example of the correct file for WordPress;</li>
<li>Works out of the box;</li>
<li>Totally Free.</li>
</ul>


Robots.txt Editor

Lightweight and perfect for multisite installations.

But in documentation need to say where the option/editor is installed (Settings > Read options).

A3 Robots Warning vs Robots.txt Editor