mortenf

This plugin adds optional per-page user name and password protection, implemented using standard HTTP protocol authorization headers, thus triggering the standard user/password dialog of the browser, and making it possible to make the browser store the credentials.
Subpages of a protected page are protected with the same user name and password as their parent.
Protected pages and their subpages do not show up in menus, search results and page lists.
<h4>Usage</h4>
<ol>
<li>When editing a page, locate the section titled “Page Protection” (probably located near the bottom of the right sidebar).</li>
<li>Check the box “Protect page and subpages”, and provide a user name and password combination.</li>
<li>Optionally, check the box “Make page and subpages searchable”, if you want the page and its subpages turn up in search results, but only with their title, not their content.</li>
<li>Save your page.</li>
</ol>
<h3>License</h3>
Copyright (c) 2009 Morten Høybye Frederiksen <a href="mailto:morten@wasab.dk" rel="nofollow ugc">morten@wasab.dk</a>
Permission to use, copy, modify, and distribute this software for any 
purpose with or without fee is hereby granted, provided that the above 
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES 
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

Page Protection

Protect pages and their subpages with user name/password, and keep protected pages from showing up in menus, search results and page lists.

TrustedLogin

The easiest and safest way to restrict access to your WordPress site’s Dashboard and administrative menus. Remove Dashboard Access is a lightweight plugin that automatically redirects users who shouldn’t have access to the Dashboard to a custom URL of your choosing. Redirects can also be configured on a per-role/per-capability basis, allowing you to keep certain users out of the Dashboard, while retaining access for others.
<ul>
<li>Limit Dashboard access to user roles:
<ul>
<li>Admins only</li>
<li>Admins + editors</li>
<li>Admins, editors, and authors</li>
<li>or restrict by specific user capability</li>
</ul>
</li>
<li>Choose your own redirect URL</li>
<li>Optionally allow users to edit their profiles</li>
<li>Display a message on the login screen so users know why they’re being redirected</li>
<li>Allow specific admin pages through the redirect — paste a list of URLs your customers should still be able to reach (with wildcard support for grouping related pages)</li>
<li>Optionally extend the block to <code>admin-ajax.php</code> requests for stricter lockdown</li>
</ul>
Blocking access to the Dashboard is a great way to prevent clients from breaking their sites, prevent users from seeing things they shouldn’t, and to keep your site’s backend more secure.
Allow only users with roles or capabilities:
You can restrict Dashboard access to Admins only, Editors or above, Authors or above, or by selecting a specific user capability.
Grant access to user profiles:
Optionally allow all users the ability to edit their profiles in the Dashboard. Users lacking the chosen capability won’t be able to access any other sections of the Dashboard.
Show a custom login message:
<ul>
<li>Supply a message to display on the login screen. Leaving this blank disables the message.</li>
</ul>
Allow specific admin pages through the redirect:
Sometimes you want to lock down the Dashboard but still let your customers reach one or two specific admin pages — a payment confirmation, a <a href="https://www.trustedlogin.com/" rel="nofollow ugc">TrustedLogin</a> secret-share screen, a custom report. Paste those URLs into the Allowed URLs box (one per line, relative or absolute), and matching requests will skip the redirect.
Use <code>*</code> as a wildcard inside a query value to match a whole group of pages at once. For example, <code>?page=tl-*</code> allows <code>tl-secrets</code>, <code>tl-config</code>, and any other page whose slug starts with <code>tl-</code>.
Optionally block AJAX requests too:
By default this plugin doesn’t touch requests to <code>admin-ajax.php</code> — most WordPress sites rely on those for legitimate frontend AJAX. If you’d rather the dashboard restriction apply there as well, turn on the “Also block AJAX” checkbox in the Advanced section of the settings page.

Remove Dashboard Access

This plugin is a must-have when working with public roles.

A must-have!

Disable Dashboard access for users of a specific role or capability. Disallowed users are redirected to a chosen URL. Get set up in seconds.

Page Protection vs Remove Dashboard Access