Do you use let's encrypt?

3038 votes ~ 15 comments


Performing IMAP queries via curl

Posted by Steve on Thu 14 Jan 2016 at 08:27
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Most people are familiar with curl, the tool that allows you to make HTTP-requests, and FTP-requests, via the command-line. Recently it gained the ability to perform IMAP operations, and this brief article demonstrates how that is done.

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Simplifying repetitive Apache configuration with mod_macro

Posted by Steve on Wed 9 Dec 2015 at 12:34

Apache is one of the more flexible webservers, and most of this is achieved via the use of various extension modules bundled with it, or externally available. mod_macro is a great module allowing you to simplifying configuration of multiple virtual hosts enormously.

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Enabling swap on debian based system

Posted by tuwid on Tue 8 Dec 2015 at 18:01

Recently I found myself without a swap partition (having installed another OS and reworked my disk-setup) so I wanted to share a quick guide to enable swap again.

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Offering IPv4-only services over IPv6

Posted by Steve on Sun 29 Nov 2015 at 08:06

Although IPv6 is clearly the way of the future there are some software services which only support IPv4 access. Here we'll show a simple approach to exporting them to IPv6-based clients.

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Analysing performance problems with systemd

Posted by Steve on Sat 26 Sep 2015 at 18:06

Now that Systemd is the default init-system in fresh installations of Debian GNU/Linux it is worth highlighting some of the new features.

( Read 243 more words ~ 6 comments posted )

Validating SPF and DKIM at SMTP-time with exim

Posted by Steve on Tue 4 Aug 2015 at 07:58
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In our recent articles we've discussed creating SPF-records to avoid spoofed mails, and the creation and setup for DKIM-signing emails, for a similar purpose. Here we'll look at the other side of the coin; performing DKIM and SPF testing on your incoming email.

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Tying together SPF and DKIM with DMARC

Posted by Steve on Mon 3 Aug 2015 at 19:35
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When it comes to increasing deliverabiity of email, and preventing spoofed/forged emails the preferred solution these days is DMARC, which allows the use of SPF and DKIM to be enforced for domains in a unified manner.

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Avoiding mail-spoofing with SPF

Posted by Steve on Sat 1 Aug 2015 at 17:34
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The Sender Policy Framework, or SPF, is an email-validation system which is designed to allow spoofed mails to be indentified. In this brief introduction we'll look at how you can configure your outgoing emails to take advantage of this validation.

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DKIM-signing outgoing mail with exim4

Posted by Steve on Wed 29 Jul 2015 at 06:28

There have been several systems designed to prevent mail spoofing over the years, the two most prominent solutions are DKIM and SPF. Here we're going to document the setup of using DKIM to signing outgoing mails with Debian's default mail transfer agent, exim4.

( Read 1152 more words ~ 18 comments posted )

Setting up a personal secure apt repository

Posted by wijnen on Sun 24 May 2015 at 09:58

Packages under development aren't always ready to be in the main Debian archive. But that doesn't mean it should be hard for people to install them. When asking people to test programs, it is most convenient to present it in the

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