HTTP/2 is finally officially adopted, and it brings significant improvements regarding server<-> client communication, making worth to try be amongst the first to have the service up. This is a relatively newRead More…
In many cases, it’s inportant to determine the average load of the server, so one can decide if an expansion of resources is needed. The easyest way to determine CPU load inRead More…
If you upgrade phplist or import an old database, it will most probably show an error message similar or exact to the one in the picture below. The issue is that thereRead More…
Postscreen is a handy feature of Postfix 2.9 and on, if you want to prevent degrading the performance of your server box with frequent external invalid requests. It actually implements a setRead More…
Compression in web servers is used to improve website loading performance, and is often measured and evaluated by search engines. Enabling gzip compression in Nginx is quite easy, since it’s already thereRead More…
This is a short article mostly optimized for use with WordPress. First, very simply insert this into your virtual host config file (probably in /etc/httpd/conf.d or in /etc/httpd/conf/httpd.conf if you’re using theRead More…
One problem that can comes up with the fantastic Centos Linux distro is that it sticks to the proven but also old packages. I needed some newer features several times. One ofRead More…
DMARC (stands for Domain-based Message Authentication, Reporting & Conformance) is a TXT record implenented in a _dmarc subdomain on your DNS server that after DKIM and SPF are implemented ultimatively advises theRead More…
Implementing Sender Policy Framework (SPF) is another mechanism to authenticate your domain as a legitimate mail sender and that means lowering your SPAM score in antispam mechanisms. It is done on theRead More…
Centos can accept and easily handle VLAN trunks just as same as doing Access mode. Let’s suppose that you have a WAN interface in access mode (so to say, it’s a plainRead More…