- How To Password-Protect Directories With mod_auth_mysql On Apache2 (Debian Squeeze)
This guide explains how to password-protect web directories (with users from a MySQL database) with mod_auth_mysql on Apache2 on a Debian Squeeze server. It is an alternative to the plain-text password files provided by mod_auth and allows you to use normal SQL syntax to create/modify delete users. You can also configure mod_auth_mysql to authenticate against an existing MySQL user table.
- How To Patch BIND9 Against DNS Cache Poisoning On Debian Etch
Dan Kaminsky earlier this month announced a massive, multi-vendor issue with DNS that could allow attackers to compromise any name server - clients, too. These two articles explain how you can fix a BIND9 nameserver on Debian Etch and Fedora/CentOS so that it is not vulnerable anymore to DNS cache poisoning.
- How To Run Fully-Virtualized Guests (HVM) With Xen 3.2 On Debian Lenny (x86_64)
This guide explains how you can set up fully-virtualized guests (HVM) with Xen 3.2 on a Debian Lenny x86_64 host system. HVM stands for HardwareVirtualMachine; to set up such guests, you need a CPU that supports hardware virtualization (Intel VT or AMD-V). Hardware virtualization allows you to install unmodified guest systems (in contrast to paravirtualization where the guest kernel needs to be modified); that way you cannot only virtualize OpenSource operating systems like Linux and BSD, but also closed-source operating systems like Windows where you cannot modify the kernel.
- How To Run LinOTP On OpenSuSE 12.3 With PostgreSQL
This tutorial describes the installation of LinOTP on OpenSUSE 12.3 using PostgreSQL as a token database. LinOTP is a two factor authentication solution with One Time Passwords. In the following Howto we are showing how to enable SSH authentication with LinOTP.
- How To Run Your Own DNS Servers (Primary And Secondary) With ISPConfig 3 (Debian Squeeze)
This tutorial shows how you can run your own DNS servers (primary and secondary) with ISPConfig 3. To do this, you need two servers with two different public IP addresses and with ISPConfig 3 installed. I will use Debian Squeeze for both DNS servers here to demonstrate the base system setup process and ISPConfig 3 installation, but once you have ISPConfig 3 installed on your servers, the configuration inside ISPConfig 3 is identical, no matter what distribution you use.
- How To Save Traffic With Lighttpd's mod_compress (Debian Squeeze)
In this tutorial I will describe how to configure mod_compress on a Lighttpd web server (on Debian Squeeze). mod_compress allows Lighttpd to compress files and deliver them to clients (e.g. browsers) that can handle compressed content which most modern browsers do. With mod_compress, you can compress HTML, CSS, Javascript, text or XML files to approx. 20 - 30% of their original sizes, thus saving you server traffic and making your modem users happier.
- How To Save Traffic With mod_deflate On Lighttpd 1.4 (Debian Etch)
In this tutorial I will describe how to install and configure mod_deflate on a lighttpd 1.4 web server on Debian Etch. mod_deflate is included by default in lighttpd 1.5, but not in 1.4 where mod_compress is used instead. The advantage of mod_deflate over mod_compress is that it can compress static and dynamic files (such as PHP files), whereas mod_compress can compress static files only. The lighttpd version coming with Debian Etch is 1.4.13, so we have to patch it to support mod_deflate. mod_deflate allows lighttpd to compress files and deliver them to clients (e.g. browsers) that can handle compressed content which most modern browsers do. With mod_deflate, you can compress HTML, text or XML files to approx. 20 - 30% of their original sizes, thus saving
- How to secure an SSL VPN with one-time passcodes and mutual authentication
SSL-based VPNs were designed to eliminate the need for complex configurations on the user's PC. Unfortunately, that was before the dangers of public WiFi networks and tougher regulatory requirements came into being. Thanks to WiFi, many attacks that were difficult are now quite simple. In particular, a man-in-the-middle attack can intercept SSL-encrypted traffic, rendering SSL-based VPNs useless - even if it is protected by a typical one-time password system. The man-in-the-middle can easily feed the one-time password into the SSL-based VPN within the alloted time.
- How to secure VNC remote access with two-factor authentication
VNC is the most popular remote access solution today. However, it was developed to provide remote access, not to provide secure remote access. Administrators have to add security to VNC by tunneling it through an encrpyted channel such as SSH and adding a layer of authentication. In this article, we will show you how to combine the NoMachine NX server to encrpyt VNC and remote X session combined with two-factor authentication from WiKID Systems to create a secure, fast remote access solution.
- How to secure WebDAV with SSL and Two-Factor Authentication | HowtoForge
This guide documents how to configure a WebDAV resource using SSL and two-factor authentication and how to access that resource from Windows, Linux and Mac.
by 2 users - How To Set Up A Caching Reverse Proxy With Squid 2.6 On Debian Etch
This article explains how you can set up a caching reverse proxy with Squid 2.6 in front of your web server on Debian Etch. If you have a high-traffic dynamic web site that generates lots of database queries on each request, you can decrease the server load dramatically by caching your content for a few minutes or more (that depends on how often you update your content).
- How To Set Up A Facebook RSS Feed Reader Application For Your Blog
This guide shows how you can build an RSS feed reader application for the social network Facebook that will display your blog's/web site's RSS feed on the profile pages of Facebook users (that have installed the RSS feed reader application). Each item of the RSS feed will have a Share button so that people can share the story with their friends, and the application will have an Invite link so that people can invite up to ten friends at once to also install this feed reader application. I will use PHP5 to build the RSS feed reader application. To parse the RSS feed and generate HTML from it, I will use Magpie RSS.
by 2 users - How To Set Up A Load-Balanced MySQL Cluster With MySQL 5.1
This tutorial shows how to configure a MySQL 5.1 cluster with five nodes: 1 x management, 2 x storage nodes and 2 x balancer nodes. This cluster is load-balanced by an Ultra Monkey package which provides heartbeat (for checking if the other node is still alive) and ldirectord (to split up the requests to the nodes of the MySQL cluster).
- How To Set Up A Loadbalanced High-Availability Apache Cluster Based On Ubuntu 8.04 LTS
This tutorial shows how to set up a two-node Apache web server cluster that provides high-availability. In front of the Apache cluster we create a load balancer that splits up incoming requests between the two Apache nodes. Because we do not want the load balancer to become another "Single Point Of Failure", we must provide high-availability for the load balancer, too. Therefore our load balancer will in fact consist out of two load balancer nodes that monitor each other using heartbeat, and if one load balancer fails, the other takes over silently.
- How To Set Up A Terminal Server In Linux Using Ubuntu 9.10 And FreeNX
FreeNX is an open source implementation of NoMachine's NX Server. It is a bit more akin to Microsoft's RDP protocol than the usual VNC, so while keeping bandwidth to a minimum, it maintains good visual quality and responsiveness.
- How To Set Up A USB-Over-IP Server And Client With Debian Lenny
This tutorial shows how to set up a USB-over-IP server with Debian Lenny as well as a USB-over-IP client (also running Debian Lenny). The USB/IP Project aims to develop a general USB device sharing system over IP network. To share USB devices between computers with their full functionality, USB/IP encapsulates "USB I/O messages" into TCP/IP payloads and transmits them between computers. USB-over-IP can be useful for virtual machines, for example, that don't have access to the host system's hardware - USB-over-IP allows virtual machines to use remote USB devices.
- How To Set Up A USB-Over-IP Server And Client With Mandriva 2010.0
This tutorial shows how to set up a USB-over-IP server with Mandriva 2010.0 as well as a USB-over-IP client (also running Mandriva 2010.0). The USB/IP Project aims to develop a general USB device sharing system over IP network. To share USB devices between computers with their full functionality, USB/IP encapsulates "USB I/O messages" into TCP/IP payloads and transmits them between computers. USB-over-IP can be useful for virtual machines, for example, that don't have access to the host system's hardware - USB-over-IP allows virtual machines to use remote USB devices.
- How To Set Up A USB-Over-IP Server And Client With OpenSUSE 11.2
This tutorial shows how to set up a USB-over-IP server with OpenSUSE 11.2 as well as a USB-over-IP client (also running OpenSUSE 11.2). The USB/IP Project aims to develop a general USB device sharing system over IP network. To share USB devices between computers with their full functionality, USB/IP encapsulates "USB I/O messages" into TCP/IP payloads and transmits them between computers. USB-over-IP can be useful for virtual machines, for example, that don't have access to the host system's hardware - USB-over-IP allows virtual machines to use remote USB devices.
- How To Set Up An SSL Vhost Under Apache2 On Ubuntu 9.10/Debian Lenny
This article explains how you can set up an SSL vhost under Apache2 on Ubuntu 9.10 and Debian Lenny so that you can access the vhost over HTTPS (port 443). SSL is short for Secure Sockets Layer and is a cryptographic protocol that provides security for communications over networks by encrypting segments of network connections at the transport layer end-to-end. We use the mod_ssl Apache module here to provide strong cryptography for Apache2 via SSL by the help of the Open Source SSL toolkit OpenSSL.
- How To Set Up Apache2 With mod_fcgid And PHP5 On Debian Etch
This tutorial describes how you can install Apache2 with mod_fcgid and PHP5 on Debian Etch. mod_fcgid is a compatible alternative to the older mod_fastcgi. It lets you execute PHP scripts with the permissions of their owners instead of the Apache user.
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