In our Linux Debian section the following articles have been published during the last weeks:

How to secure your Debian server by changing the SSH port number (read tutorial here)
How to secure your Debian server by setting up SSH for passwordless login via public- and private-key cryptography (read tutorial here)
How to secure your Debian server by [...]

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In our Linux Debian section the following articles have been published during the last weeks:

How to secure your Debian server by changing the SSH port number (read tutorial here)
How to secure your Debian server by setting up SSH for passwordless login via public- and private-key cryptography (read tutorial here)
How to secure your Debian server by [...]

[Read more →]

I. Abstract
No doubt, configuring a web server won’t work without being in the know of basics about the terminal, vim or nano. Anyway many tasks can also performed by administrating a server using a GUI. The problem is: only Windows 2003 or Windows 2008 come with a preinstalled remote desktop connection – and they are [...]

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I. Abstract
It has been found by Luciano Bello that the Debian OpenSSL package has a severe security bug since 2006. By removing some lines of code from the md_rand.c source code that originally caused the memory check tool Valgrind to alert (see original Debian discussion here) the box of pandorra has been opened and the [...]

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I. Abstract
Sometimes we experience the situation we need to upload or download something and there is no ftp installed yet. The following article provides information about uploading (push’ing) or downloading (pull’ing) via SSH using the terminal only.
II. Push commands (Upload to server)

client$ ssh remote_address cat <localfile ">" remote_file
client$ ssh remote_address cat <localfile – ">" [...]

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I. Abstract
All of us know, there are lots of bad guys out there just trying to brute force our ssh ports. The following article provides information about the first steps to be performed when setting up a new webserver running Debian Etch.
For security reasons we recommend applying these how to’s before proceeding

Mandatory: How to secure [...]

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Are you also tired of those weird guys, script kiddies and wanna-be-hackers, who are trying to ssh your server on port 22? All those connection attempts cost your server time and in the end your money.
I. Abstract:
By just changing the standard ssh port of your server you can reduce the amount of unwanted login attempts [...]

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I. Abstract
Some of you may already have experienced the same phenomenon. We wanted to secure one of our servers and disallow any password login. We configured the passwordless login to use ssh and use public-, private-key mode (see here) instead. But after having saved the sshd_config file, we eventually couldn’t reconnect to our Debian server [...]

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