This tutorial shows how to harden PHP5 with Suhosin on a CentOS 5.4 server. From the Suhosin project page: "Suhosin is an advanced protection system for PHP installations that was designed to protect servers and users from known and unknown flaws in PHP applications and the PHP core. Suhosin comes in two independent parts, that can be used separately or in combination.

This tutorial shows how to harden PHP5 with Suhosin on a CentOS 5.0 server. From the Suhosin project page:

Debian 5.0, "Lenny" was released on 14 February 2009 after nearly two years of development. It includes more than 25 000 packages including many security enhancements such as SELinux included with all new installs (although it is disabled by default) and PHP's Suhosin system.

This tutorial shows how to harden PHP5 with Suhosin on a CentOS 5.3 server.

This tutorial shows how to harden PHP5 with Suhosin on a Fedora 7 server.

I personally applaud the initiative on a technical level, and if I was a Firefox user, I would install the extension in a heart beat. But, on a fundamental level, the extension will fail to make any real improvement in the security of the web for one simple reason – users are the biggest weakness in any security system, and there is no patch for users.

Updating FreeBSD server system is quite easy. You can apply security patch to keep freebsd system up to date.

The group responsible for maintaining the internet's most popular domain name software BIND has admitted it caused problems by fast-tracking a security patch designed to fix the widescale DNS flaw discovered by researcher Dan Kaminsky this month.

The GNU diff and patch utilities let you compare files to generate a patch that describes the changes between files. You can then apply the patch file on that machine or another. You might think to use diff and patch on XML files, since they are just text files -- and depending on your application, diff and patch might serve your needs well.