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Fixes you need after upgrading Ubuntu from 14.04 to 16.04

Apache

Ubuntu 16.04 ships Apache 2.4, there's no mysql auth module for Apache available, so you must disable all mysql auth related settings in Apache config files. For example:

• /etc/apache2/apache2.conf
• /etc/apache2/conf-available/awstats.conf
• /etc/apache2/conf-available/cluebringer.conf

Postfix

postconf -e daemon_directory='/usr/lib/postfix/sbin'
postconf -e shlib_directory='/usr/lib/postfix'

• Incorrect daemon_directory causes Postfix cannot start.
• Incorrect shlib_directory causes Postfix cannot find pcre/mysql/pgsql/ldap modules.

iRedAPD

iRedAPD requires package python-pymysql:

apt -y install python-pymysql

Roundcube webmail

Make sure you have settings below in Roundcube config file config/config.inc.php:

// Required if you're running PHP 5.6 or later
$config['imap_conn_options'] = array(
    'ssl' => array(
        'verify_peer'  => false,
        'verify_peer_name' => false,
    ),
);

// Required if you're running PHP 5.6 or later
$config['smtp_conn_options'] = array(
    'ssl' => array(
        'verify_peer'      => false,
        'verify_peer_name' => false,
    ),
);

PHP [OPTIONAL]

NOTE: This step is toally optional if you're fine with old PHP release.

php was not upgraded to 7.0 automatically, have to install them manually:

apt-get install php-json php-gd php-mcrypt php-curl mcrypt php-intl php-xml php-mbstring php-mysql libapache2-mod-php

Nginx and php-fpm

If you're running Nginx, you must install package php-fpm too:

apt install php-fpm

php-fpm daemon socket file is changed:

• old one: /var/run/php-fpm.socket
• new one: /var/run/php/php7.0-fpm.sock

iRedMail hard-codes php-fpm socket file in /etc/nginx/nginx.conf or /etc/nginx/conf.d/default.conf, you must update them to use new socket file.

Fail2ban

After upgrading Fail2ban, it will fail to start due to duplicate parameter port = in file /etc/fail2ban/jail.conf under section [pam-generic] like below:

[pam-generic]
...
port = all
...
port = anyport

Please comment out either one of them, then Fail2ban should be happy to start.