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Setting Up ProFTPd + TLS On Ubuntu 11.04 (Natty Narwhal)
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 11.04 server.
Mounting Remote Directories With SSHFS On Debian Squeeze
This tutorial explains how you can mount a directory from a remote server on the local server securely using SSHFS. SSHFS (Secure SHell FileSystem) is a filesystem that serves files/directories securely over SSH, and local users can use them just as if the were local files/directories. On the local computer, the remote share is mounted via FUSE (Filesystem in Userspace). I will use Debian Squeeze for both the local and the remote server.
Tiny Web Proxy And Content Filtering Appliance On CentOS 6 (Version 1.4)
This small HOWTO will show you how to set up a small virtual machine to speed up and secure your home / small enterprise web surfing network using CentOS 6, Squid 3.1 and QuintoLabs Content Security 1.4 applications deployed in a VMware Virtual Player running on Windows 7 x64 as a host operating system. This howto is targeted at novice users and may sometimes seem too thorough for more advanced gurus.
How To Set Up SSL Vhosts Under Nginx + SNI Support (Ubuntu 11.04/Debian Squeeze)
This article explains how you can set up SSL vhosts under nginx on Ubuntu 11.04 and Debian Squeeze 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. In addition to that I will show how to make use of SNI (Server Name Indication) to allow multiple SSL vhosts per IP address.
Restricting Users To SFTP Plus Setting Up Chrooted SSH/SFTP (Debian Squeeze)
This tutorial describes how to give users chrooted SSH and/or chrooted SFTP access on Debian Squeeze. With this setup, you can give your users shell access without having to fear that they can see your whole system. Your users will be jailed in a specific directory which they will not be able to break out of. I will also show how to restrict users to SFTP so that they cannot use SSH (this part is independent from the chroot part of this tutorial).
Using scponly To Allow SCP/SFTP Logins And Disable SSH Logins On Debian Squeeze
scponly is an alternate shell that restricts users to SCP and SFTP logins, but disallows SSH logins. It is a wrapper to the OpenSSH suite of applications. With the help of scponly, you can allow your users to use clients such as WinSCP or FileZilla to upload/download files, but you refuse SSH logins (e.g. with PuTTY) so that your users cannot execute files/programs. This tutorial shows how to install and use scponly on Debian Squeeze.
Xtables-Addons On Centos 6 & Iptables GeoIP Filtering
This tutorial will explain how to install aditional modules for the kernel to use with iptables rules sets (netfilter modules). Xtables-addons is the successor to patch-o-matic(-ng). Likewise, it contains extensions that were not, or are not yet, accepted in the main kernel/iptables packages. Xtables-addons is different from patch-o-matic in that you do not have to patch or recompile the kernel.
Setting Up ProFTPd + TLS On Debian Squeeze
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 a Debian Squeeze server.
How To Encrypt Directories/Partitions With eCryptfs On Debian Squeeze
eCryptfs is a POSIX-compliant enterprise-class stacked cryptographic filesystem for Linux. You can use it to encrypt partitions and also directories that don't use a partition of their own, no matter the underlying filesystem, partition type, etc. This tutorial shows how to use eCryptfs to encrypt a directory on Debian Squeeze.
Securing OpenVPN With A One Time Password (OTP) On Ubuntu
So, you got yourself a nice OpenVPN box. People need to login with their certificates but... if their laptop is stolen anyone could login. Sure, you could add password login but thats a bit outdated. The solution for this is using a OTP (one time password).
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