Linux Tutorials on the topic “security”

  • Thoughts on intermediate compatibile SSL with Let's Encrypt certificates

    tux Author: Patrik HabdakTags: , Comments: 2

    Many people have decided to implement Let's Encrypt into their production sites. I find this still a very bad idea to be done without being very (but really very) careful. Let's Encrypt brings you freedom but also limits you in using the certificate with SHA-256 RSA Encryption. Support for SHA-256 has improved over the last few years. Most browsers, platforms, mail clients and mobile devices already support SHA-256. However, some older operating systems such as Windows XP pre-SP3 do not support SHA-256 encryption. Many organizations will be able to convert to SHA-256 without running into user experience issues, and many may want to encourage users running older, less secure systems to upgrade. In this tutorial, we are going to deal with this incompatibility in a simple, but still nasty way.

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  • SSL Certificates For PostgreSQL

    tux Author: thebrain.caTags: , , Comments: 10

    SSL Certificates For PostgreSQL This describes how to set up ssl certificates to enable encrypted connections from PgAdmin on some client machine to postgresql on a server machine. The assumption is that postgresql (compiled with ssl support) and openssl are already installed and functional on the server (Linux). PgAdmin is already installed on the client (either Windows or Linux).

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  • How to install and configure vsftpd with TLS on Debian 8 (Jessie)

    debian VMWare Image Download Author: Till BrehmTags: , , Comments: 6

    This article explains how to set up a TLS enabled vsftpd server on a Debian 8 server. FTP is a very insecure protocol by default 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.

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  • How to Encrypt your Data with EncFS on Debian 8 (Jessie)

    debian Author: Till BrehmTags: , Comments: 4

    EncFS provides an encrypted filesystem in user-space. It runs without any special permissions and uses the FUSE library and Linux kernel module to provide the filesystem interface. It is a pass-through filesystem, not an encrypted block device, which means it is created on top of an existing filesystem. This tutorial shows how you can use EncFS on Debian Jessie to encrypt your data.

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  • How to install ProFTPd with TLS support on Ubuntu 15.10

    ubuntu VMWare Image Download Author: Till BrehmTags: , , , , Comments: 0

    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 15.10 server, how to add an FTP user and to use FileZilla to connect securely with TLS.

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  • How To Get LTS updates for Debian 6 (Squeeze)

    debian Author: Till BrehmTags: , , Comments: 3

    Debian Squeeze (6.0) is the so named "Old Stable" branch of Debian, the official support for this version ended in april 2014. Squeze is still used on many servers, so a group of Debian developers decided to provide security patches for a longer timespan for this release. These so called LTS updates (LTS = Long Term Support) are not available on the normal Debian update repository and not every user might be aware that he wont get these updates automatically. The following short guide explains how to enable the LTS repository and install the updates.

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  • How to Encrypt Directories/Partitions with eCryptfs on Debian 8 (Jessie)

    debian Author: falkoTags: , , Comments: 5

    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 Jessie

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  • How to safely wipe your data with Dariks Boot and Nuke bootable live CD

    linux Author: Bill ToulasTags: , Comments: 3

    Sometimes, we need to completely and irreversibly wipe all data contained in a disk to keep them from falling into the wrong hands. This may not be something we are doing on a day to day basis, but if you want to do it, you should do it right and ensure that the data cannot be recovered by experts. One of the many ways of doing this is through Darik's Boot and Nuke bootable live CD. This tool is made from the same team that develops the professional-grade Blancco data eraser, only it is available for free and without guarantee or support. The reason I like DBaN is because it is very simple to use and does the job fast.

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  • Encrypt your data with EncFS on Ubuntu 15.10

    ubuntu Author: falkoTags: , Comments: 0

    EncFS provides an encrypted filesystem in user-space. It runs without any special permissions and uses the FUSE library and Linux kernel module to provide the filesystem interface. It is a pass-through filesystem, not an encrypted block device, which means it is created on top of an existing filesystem. This tutorial shows how you can use EncFS on Ubuntu 15.10 (Wiley Werewolf) to encrypt your data.

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  • How to do image steganography on Linux

    linux Author: Bill ToulasTags: , , , , , Comments: 0

    Steganography is the ancient art of the information concealment. People have found numerous methods to achieve this such as “invisible” inks, messages hidden in objects, and the famous “null cipher”. The word “steganography” comes from the Greek words “steganos” and “graphy” which means “impenetrable writing”. The years have passed and steganography has evolved into a sophisticated part of cryptography.

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