Google's reCaptcha on Roundcube's Login Form

Hi everyone, like the title say, let's add the Google's reCaptcha into the Roundcube's login form. First, this post is based on this article.

Here we go:

Open a terminal and connect to CWP server.

#Installing GIT

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yum install git -y
#Clone the plugin through git

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cd /usr/local/cwpsrv/var/services/roundcube/plugins/
git clone https://github.com/dsoares/rcguard.git rcguard
#Change directory permission

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chown -R cwpsvc:cwpsvc rcguard/
#Rename the config file

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cd rcguard
mv config.inc.php.dist config.inc.php
#Edit the config file and adding the Keys

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nano config.inc.php
Once in there look for:

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// Public key for reCAPTCHA<br>$config['recaptcha_publickey'] = '';
// Private key for reCAPTCHA<br>$config['recaptcha_privatekey'] = '';
Add your Keys, if you don't have any, you can generate them here

NOTE: to save changes in nano editor, press Ctrl+O and Ctrl+X to exit

#Like the original article say:

You can change other settings of the plugin per your needs. For example this one:

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// Number of failed logins before reCAPTCHA is shown
$rcmail_config['failed_attempts'] = 5;
Change it to 0 (zero) to show the captcha always.

#Create a new table in the Roundcube database.

Go to PHPMyAdmin, selec the Roundcube database (roundcube), click the SQL tab and copy/paste the following code:

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CREATE TABLE `rcguard` (
  `ip` VARCHAR(40) NOT NULL,
  `first` DATETIME NOT NULL,
  `last` DATETIME NOT NULL,
  `hits` INT(10) NOT NULL,
  PRIMARY KEY (`ip`),
  INDEX `last_index` (`last`),
  INDEX `hits_index` (`hits`)
) ENGINE = InnoDB CHARACTER SET utf8 COLLATE utf8_general_ci;
Then, click "Go"

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#Last Step

Add 'rcguard' into Roundcube's config file. Should be something like this:

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nano /usr/local/cwpsrv/var/services/roundcube/config/config.inc.php

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$config['plugins'] = array(
    'plugin1',
    'plugin2',
    'rcguard',
That's all, now Roundcube's form login should look like this:

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Works great with CWP v0.9.8.753+ (CentOS 7)
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Thanks AlexG. Works great with CWPpro version: 0.9.8.850 Centos 7.

I used your advice and I like these changes.