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If you’ve found yourself in a situation where your end users for some reason are getting bounce notifications for emails they didn’t send out don’t panic. Sometimes it _could_ mean your server has been compromised (i.e.: someone managed to guess the users password and is sending mail using their account). However unless your mail queuesRead more

Credits go to John Shiells, sysadmin @ Nucleus If you run a system that handles millions of small files (like a windows-based mail server), you may encounter a problem where RAM seems to “disappear” and services on said server slowly slow down because of swapping.  If you look under task manager, you don’t see a smokingRead more

Although many IT administrators already know this bit and your firewall or router already comes with VPN Server capabilities (like a Cisco Firewall for instance and its Cisco VPN client), setting up a quick and dirty VPN server on Windows (7, 2008, and 2012) is pretty simply to do provided you can connect to anRead more

pfSense is one of the most popular open-source firewalls available. It’s basically a fork of m0n0wall project by Chris Buechler and Scott Ullrich. It can be found on imbedded devices, servers, and as pre-configured virtual machines for various hypervisors. Many small and medium sized businesses use pfSense because of its simplicity and its dual roleRead more

Most people who read this blog are technology-competent folks who generally never get infected by anything; although, if they do, they know how to deal with. By the same token, we are often called upon by friends and family to serve as free technical support and more often than not, it’s because they clicked on aRead more