Security

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How To Add Two-Factor Authentication To Openvpn AS With The WiKID Strong Authentication Server

How To Add Two-Factor Authentication To Openvpn AS With The WiKID Strong Authentication Server

It's been a while since our last tutorial on how to add two-factor authentication to OpenVPN using the WiKID Strong Authentication System. The people at OpenVPN have been very active lately and it seems like a good time to take a look at what they've done. It's still dead simple to configure, but it is mostly done via the new slick web interface.

How To Set Up An SSL Vhost Under Apache2 On Ubuntu 9.10/Debian Lenny

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.

Setting Up ProFTPd + TLS On Ubuntu 9.10 (Karmic Koala)

Setting Up ProFTPd + TLS On Ubuntu 9.10 (Karmic Koala)

FTP is a very insecure protocol because all passwords and all data are transferred in clear text. By using TLS, the whole communication can be encrypted, thus making FTP much more secure. This article explains how to set up ProFTPd with TLS on an Ubuntu 9.10 server.

Dansguardian Content Filtering With Transparent Proxy On Ubuntu 9.10 Karmic

Dansguardian Content Filtering With Transparent Proxy On Ubuntu 9.10 Karmic

This tutorial explains how you can add content filtering to an existing Ubuntu 9.10 system, and how you can prevent users from bypassing the filtering system. We will use Dansguardian content filtering to set up a transparent proxy.

Block Spam, Preventing URL Injection And Block HTTP Attacks With mod_dnsblacklist

Block Spam, Preventing URL Injection And Block HTTP Attacks With mod_dnsblacklist

mod_dnsblacklist is a Lighttpd module that use DNSBL in order to block spam relay via web forms, preventing URL injection, block http DDoS attacks from bots and generally protecting your web service denying access to a known bad IP address.

Setting Up ProFTPd + TLS On Ubuntu 9.04 (Jaunty Jackalope)

Setting Up ProFTPd + TLS On Ubuntu 9.04 (Jaunty Jackalope)

FTP is a very insecure protocol because all passwords and all data are transferred in clear text. By using TLS, the whole communication can be encrypted, thus making FTP much more secure. This article explains how to set up ProFTPd with TLS on an Ubuntu 9.04 server.

Linux Security Notes - AIDE File Integrity

Linux Security Notes - AIDE File Integrity

AIDE (Advanced Intrusion Detection Enviornment) is a tool to check the file integrity. It is an opensource substitute for TRIPWIRE. It allows to take snapshots of all the major configuration files, binaries as well as libraries stats. And helps to find which binaries have been changed in case of compromisation of the system.

How To Prevent Brute Force Attacks With Brutelock

How To Prevent Brute Force Attacks With Brutelock

Brutelock is an open source program that actively monitors various system logs and immediately blocks malicious IPs trying to attack your server. Brutelock not only protects against ssh attacks but also other common systems such as ftp, pop and imap.  It has an extendible rules format that allows you to monitor an unlimited number of other services by simply supplying the log file and a simple regex search pattern.

Installation & Configuration Of Intrusion Detection With Snort, ACIDBASE, MySQL, And Apache2 On Ubuntu 9.04 Using SPM

Installation & Configuration Of Intrusion Detection With Snort, ACIDBASE, MySQL, And Apache2 On Ubuntu 9.04 Using SPM

This tutorial describes how to install and configure Snort intrusion detection system (IDS), ACIDBASE (Basic Analysis and Security Engine), MySQL, and Apache2 on Ubuntu 9.04 using packages from Ubuntu’s Synaptic Package Manager. Snort will assist you in monitoring your network and alert you about possible threats. Snort will output its log files to a MySQL database which ACIDBASE will use to display in a graphical interface in web browser.

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