Sharing Outlook calendar with Nextcloud
I use a personal server running Nextcloud, a cloud solution to access, share and protect files, calendars, contacts, communication and more at home and in enterprise environments. There, I keep my personal calendar, which is synced to a variety of mobile devices. However, at work I am forced to use Microsoft Outlook with Exchange for my calendar and contact. To have access to my work calendar on my personal device would force me to enrol my personal device in a corporate environment. However, that would entail certain policies and restrictions I’m not comfortable with on my personal device. Fortunately, I found a way of sharing Outlook calendar with Nextcloud.
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It is just one of those things that as an admin, you sometimes come across. There’s a directory somewhere that fills up with clutter. Every day, programs dump temporary files there or users upload stuff and before long, there are thousands of files of debris and cruft. How do you keep this directory neat and tidy? Easy, you just make a small script that will delete files older than x days. Continue reading “Delete files older than”
Recently, I was asked if it was possible to require Transport Layer Security (TLS) for sending email for certain domains, through a specific relay. For added complexity, the list of domains would need to be updated daily. Of course it’s possible, I said. And yes, Postfix is up to the challenge. Here’s how to require TLS for certain domains in Postfix.
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If you have any kind of system connected to the Internet, you are no doubt aware that no matter how small or unimportant it might seem, it is frequently probed, tested or subject to various attempts at abuse. These attacks come from so many malicious hosts that it is impossible to keep track by hand. So I started looking for a way to implement an automated blacklist to use with iptables. Continue reading “Using blacklists with iptables”
If, like me, you like to use the openSUSE Linux distribution, both personally and professionally and you need to connect to a VMWare View environment, you’ll be unpleasantly surprised: there’s no supported client for openSUSE or other RPM based distributions. There is however, an Ubuntu package.. Continue reading “Installing the VMWare View client on openSUSE 13.1”
In this post, we’ll take a look at how to migrate spamassassin from the default db files to a MySQL database. The assumption is that you have a working mail server that already does spam scanning and where spamassassin stores its information in the default db files. In order to improve speed, especially for auto-expiry but certainly also for spam filtering itself, it is advisable to store the data in a faster database. Continue reading “Migrating spamassassin from db files to MySQL”