yehudah

Add a meta box to all posts, pages, custom post types to add the old url you want to redirect from (old url) to the new post. 
You can use redirection plugin here: <a href="https://wordpress.org/plugins/redirection/" rel="ugc">Redirection Plugin.</a> OR The other option is the website htaccess file.
This will help you create redirects while creating or updating your site posts or pages, so you don’t need to update the old and new links when you finish updating your website.
so you don’t need to remember:
<ul>
<li>The new posts or pages url</li>
<li>which post or page I all ready redirected ?</li>
<li>repeat 50% of the process again and so on ….</li>
</ul>

Redirect To WP

This will help you sync redirects while creating or updating your site posts or pages, This will sync to the redirection plugin or htaccess.

MatteoCandura

This plugin simplifies the life of WordPress users. 
Now you can easily create an htpasswd file to improve security of your site. 
Set and edit username and password, decide whether to enable or not the protection and the plugin will create a .htpasswd file and also add the necessary code to .htaccess file. 
You can also enable or disable protection and choose to change the permissions of .htaccess and .htpasswd files’ and set those to 444. This improve your security.
Plugin available on <a href="https://github.com/MatteoCandura/wp-htpasswd" rel="nofollow ugc">GitHub</a>.

WP htpasswd

This plugin improve the security of your website during development. It’s perfect to protect your directory. Easy to install, very easy to create username & password. Good job!

Security

Works amazing!

WP Htaccess helps you to improve the security of your site.

Redirect To WP vs WP htpasswd