necrux

Print Until it Makes Sense!

  • Who am I?

SSH

(S)FTP(S) or: How I Learned to Stop Worrying and Love File Transfer

December 29, 2015 / Leave a Comment

File transfer is a fundamental concept of the Internet, however there are a plethora of configuration options that often lead to confusion. In this article I am going to discuss installation and configuration of FTP, FTPS, and SFTP as well as how to chroot (i.e. jail) users for these services. FTP, The Basics FTP is … [Read more…]

Posted in: FTP, Linux, SFTP, SSH Tagged: Active FTP, FTP, FTPS, Passive FTP, SFTP

The Anatomy of an SSH Connection

December 19, 2015 / Leave a Comment

Over the last couple of days I have become increasingly interested in unraveling the mysteries behind establishing an SSH connection. The process is very intricate and some of the documentation seems scattered, so I decided to write a bit about it in the hopes that someone else may benefit. Prior to writing this article I … [Read more…]

Posted in: Linux, SSH Tagged: KexAlgorithm, Key Exchange, Linux, SSH, SSH Encryption

SSH Match Statements

September 17, 2015 / Leave a Comment

An often underused feature of OpenSSH is the Match statement. Match statements work on OpenSSH 4.4+; applicable versions ship with RHEL/CentOS 6+ and Ubuntu 12.04+. The Match directive accepts the following options: Match User Match Group Match Host Match LocalAddress Match LocalPort Match Address Match statements can be used to help harden SSH but can … [Read more…]

Posted in: Linux, SSH Tagged: Linux, Match Statements, SSH

Recent Posts

  • SMTP Sender-Dependent SASL Authentication in Postfix
  • My Adventures with Multiple Monitors on Linux
  • Parse Log Files with sed
  • Backup and Restore Permissions in Linux
  • Bind Mounts in Linux

Recent Comments

  • D. Axel on SMTP Sender-Dependent SASL Authentication in Postfix

Archives

  • January 2016
  • December 2015
  • September 2015

Categories

  • Bash
  • email
  • FTP
  • Linux
  • Mailgun
  • Permissions
  • Postfix
  • sed
  • SFTP
  • SSH
  • Virtualization

Meta

  • Log in
  • Entries feed
  • Comments feed
  • WordPress.org