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How to secure an SSL VPN with one-time passcodes and mutual authentication

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's 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.

Installing Xen On An Ubuntu Feisty Fawn Server From The Ubuntu Repositories

Installing Xen On An Ubuntu Feisty Fawn Server From The Ubuntu Repositories

This tutorial provides step-by-step instructions on how to install Xen on an Ubuntu Feisty Fawn (Ubuntu 7.04) server system (i386). You can find all the software used here in the Ubuntu repositories, so no external files or compilation are needed. Xen lets you create guest operating systems (*nix operating systems like Linux and FreeBSD), so called "virtual machines" or domUs, under a host operating system (dom0).

Entering A Safe Mirror When Logging In With Unionfs And Chroot

Entering A Safe Mirror When Logging In With Unionfs And Chroot

When reading a 'hint' on the website of LinuxFromScratch I discovered the special capabilities of unionfs, specially in combination with chroot. Later I read a HowTo on a wikiwebsite of Gentoo, about entering a chrooted homedirectory when using a special script as shell. Combining these two brings me to using a chrooted environment, which you enter when logging in as a special user. This environment is a exact copy (mirror) of the system you're working on. Because you're in safe copy of the real system, you can do whatever you like, it will never change the system, everything stays inside the cache (the readwrite branch).

Postfix Monitoring With Mailgraph And pflogsumm On Debian Etch

Postfix Monitoring With Mailgraph And pflogsumm On Debian Etch

This article describes how you can monitor your Postfix mailserver with the tools Mailgraph and pflogsumm. Mailgraph creates daily, weekly, monthly, and yearly graphs of sent, received, bounced, and rejected emails and also of spam and viruses, if SpamAssassin and ClamAV are integrated into Postfix (e.g. using amavisd-new). These graphs can be accessed with a browser, whereas pflogsumm ("Postfix Log Entry Summarizer") can be used to send reports of Postfix activity per email.

Configuring Samba 3.0 To Use The ADS Security Mode (CentOS)

Configuring Samba 3.0 To Use The ADS Security Mode (CentOS)

The intent of this article is to show you how to configure your Linux machine and Samba server to participate in a Windows 2003 Active Directory domain as a Member Server using Kerberos authentication. This involves using the security = ADS security mode in Samba.

Virtual Hosting With vsftpd And MySQL On Debian Etch

Virtual Hosting With vsftpd And MySQL On Debian Etch

Vsftpd is one of the most secure and fastest FTP servers for Linux. Usually vsftpd is configured to work with system users. This document describes how to install a vsftpd server that uses virtual users from a MySQL database instead of real system users. This is much more performant and allows to have thousands of ftp users on a single machine.

Installing And Working With Xoops Under Ubuntu 6.10

Installing And Working With Xoops Under Ubuntu 6.10

I want to show you how to install Xoops on Ubuntu. I used the Ubuntu 6.10 Server Edition, but it will probably work on other systems as well. Xoops is a modern Content-Management-System which can be extended with a variety of modules.

Setting Up Postfix As A Backup MX

Setting Up Postfix As A Backup MX

In this tutorial I will show how you can set up a Postfix mailserver as a backup mail exchanger for a domain so that it accepts mails for this domain in case the primary mail exchanger is down or unreachable, and passes the mails on to the primary MX once that one is up again.

The Perfect Server - Fedora 7

The Perfect Server - Fedora 7

This is a detailed description about how to set up a Fedora 7 server that offers all services needed by ISPs and hosters: Apache web server (SSL-capable), Postfix mail server with SMTP-AUTH and TLS, BIND DNS server, Proftpd FTP server, MySQL server, Dovecot POP3/IMAP, Quota, Firewall, etc. This tutorial is written for the 32-bit version of Fedora 7, but should apply to the 64-bit version with very little modifications as well.

Setting Up A Subversion Repository Using Apache, With Auto Updatable Working Copy

Setting Up A Subversion Repository Using Apache, With Auto Updatable Working Copy

Subversion is a free/open-source version control system. That is, Subversion manages files and directories over time. A tree of files is placed into a central repository. The repository is much like an ordinary file server, except that it remembers every change ever made to your files and directories. This allows you to recover older versions of your data, or examine the history of how your data changed. In this regard, many people think of a version control system as a sort of “time machine”.

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