Unfortunately many server administrators get this error ever now and then on their server, netenberg has failed to address the problem and has only provided the following temporary fix everytime the problem arises. This tutorial provides the steps needed to fix the problem on your server. This is a very simple tutorial and throughout most of it you can simply copy and paste via your SSH terminal.

Simple way: (Please note that if this does not work try the complex way):

Linux Code:
cd /tmp
chattr -i ixed
rm -Rf ixed*
wget -N http://netenberg.com/files/ixed.tgz
tar xzpf ixed.tgz
rm -f ixed.tgz
chattr +i ixed

FreeBSD Code:
cd /tmp
chflags noschg ixed
rm -Rf ixed*
wget -N http://netenberg.com/files/ixed.tgz
tar xzpf ixed.tgz
rm -f ixed.tgz
chflags schg ixed

PLEASE NOTE: If you've already done this in the past, but you start receiving errors again, check to see if PHP has been upgraded to a newer version. If so, you may need to fetch newer ixed files to cover your version of PHP. SourceGuardian updates ixed files fairly quickly, but if you can't find an ixed file for your version of PHP, then try renaming the latest version of the ixed file prior to your version to match your version:

FreeBSD and Linux Code:
cd /tmp/ixed
cp ixed.lin.4.3.8.pxp ixed.lin.4.3.9.pxp

This fix may or may not work, on each version of PHP a new ixed file is released, so by doing this you are creating a fake version. As soon as the real ixed files gets released for your version of PHP then replace your fake version with the real version (by following the first set on instructions).

Complex Fix: (Adds ixed decoder files as a Dynamic Extentions to the php.ini file. However CPanel may modify php.ini on a daily basis and you may have to fix over and over again)

Code:
cd /usr/local/cpanel/3rdparty/etc/
rm -f ixed.tgz
wget http://netenberg.com/files/ixed.tgz
tar xzpf ixed.tgz
rm -f ixed.tgz

Linux
chattr -i /usr/local/cpanel/3rdparty/etc/php.ini

FreeBSD
chflags noschg /usr/local/cpanel/3rdparty/etc/php/ini

Last Step
/usr/local/cpanel/bin/checkphpini

Retry to load Fantastico. If you still get the errors, do this:

Code:
/scripts/upcp --force

If you still get errors:

Linux Code:
chattr -i /usr/local/cpanel/3rdparty/etc/php.ini
pico -w /usr/local/cpanel/3rdparty/etc/php.ini

FreeBSD Code:
chflags noschg /usr/local/cpanel/3rdparty/etc/php.ini
pico -w /usr/local/cpanel/3rdparty/etc/php.ini

and edit the following line:
extension_dir = ./ ; directory in which ...

and remove the ./ if it appears (just those two characters, so it is set like this:
extension_dir = ; directory in which ...

instead.

Note: Some users find that changing the extension_dir to "/" (no period) works better for them.

Scroll down to the Dynamic Extentions area of the file and add the following line at the end of this section (before Module Settings):
extension="/usr/local/cpanel/3rdparty/etc/ixed/ixed.lin.4.3.8.pxp"

Change the number in ixed.lin.4.X.X.pxp to match whatever version of PHP you have installed.

If you get no more errors enter this:

Linux Code:
chattr +i /usr/local/cpanel/3rdparty/etc/php.ini

FreeBSD Code:
chflags schg /usr/local/cpanel/3rdparty/etc/php.ini

Last of all if you are still having problems, make sure you ixed directories are all chmoded to 0755:

Code:
chmod -Rf 0755 ixed

This may need to be done in either the /tmp dir or the /usr/local/cpanel/3rdparty/etc/ dir.

Credits: parts of this tutorial from the http://www.netenberg.com website.

Similar Articles : How to install ffmpeg on CentOS or Redhat Enteprirse Linux the easy way (Using RPMs/Yum) , Installing Pico on FreeBSD, Turck MMCache for PHP, Apache 2 Install and Upgrade Guide, lingerd - Setup and Installation, Howto mod_rewrite with Apache, Getting started with SSH Tutorial, How to install PRM (Process Resource Monitor), How to install ionCube loader, Apache Log Files Explained, Server Loads Explained, Guide to .htaccess tutorial and tips, Optimize and Tweak High-Traffic Servers, Common SSH Commands - Linux Shell Commands, Upgrade Guide From Red Hat 7.3 to 9.0, Changing Web Hosts? Step-By-Step Guide, Customizing PHP Safe Mode, Apache 2 PHP 4 and 5 (mod_php) on Linux - Apache2 PHP4 PHP5 Installation, Fantastico Error: enc_restrictions.inc.php is protected by SourceGuardian and requires file ixed.lin.4.X.X.pxp, 4.3.7.pxp, 4.3.8.pxp, 4.3.9.pxp error, How to Copy Files Across a Network/Internet in UNIX/LINUX (Redhat, Debian, FreeBSD, etc) - scp tar rsync, Fixing rndc error in WHM/cPanel: rnd: connection failed: connection refused, wget - how to use tuturial, cPanel Awstats Fix - Stoped Logging on single domain, How to Install Zend Optimizer/Encoder on cPanel/WHM, Upgrading CentOS 3.3 to 3.4 using yum, Redhat 7.3, 8.0, and 9.0 upgrade to CentOS 3 using yum (Red hat), Tutorial/HOW-TO: Kernel 2.6 Compilation with Grsecurity (grsec) - 2.6.5, 2.6.7, 2.6.8, 2.8.1, 2.6.9, 2.6.10, 2.6.11.6 , Repairing a mySQL Database/Table - How to restore/repair/recover, Flood Protection/DoS/DDoS Apache 1.3 and 2.0 - mod_dosevasive (Avoiding Denial of Service Attacks)