CentOS 6 users, because Let’s Encrypt requires at least Python 2.7 to run you need to install a newer version. Luckily you can install 2.7 version aside to the 2.6 version already in your system. To do that you need to put in IUS repository. The installation process is actually very easy. All you need […]
Both Let’s Encrypt intermediate certificates, Let’s Encrypt Authority X1 and Let’s Encrypt Authority X2, received cross-signatures. Web servers will need to be configured to serve the appropriate cross-signature certificate as part of the trust chain. The Let’s Encrypt client will handle this automatically. More info on Let’s Encrypt blog.
It looks like Debconf is on theese days. You can watch it live at here or there’s a video archive of what is happening.
Suppose you really need a highly available service. Normally you would put a load balancer in front of a server farm. But what happens when the load balancer fails? Well, we could have to load balancers, one which is actually active and the second one kicking in when first one fails.
I use X Forwarging over SSH for several things to manage, such as virtual machines with “virt-manager”. Today, when I wanted to run a graphical tool on one of the servers I kept getting this error. Error: Can’t open display: localhost:10.0 I verified all the possible configurations issued, launched the ssh command with -v argument […]
I hate ads. Don’t get me wrong, I understand why they’re here, I understand how the system works, I just hate when ads get in your way. For Chrismas, Santa and my Piggy Bank decided to make me have a Galaxy S5 Duos (Duos stands for Dual SIM). It all went well, short after the […]
When your maillog on a CentOS/*EL machine looks like this: mail postfix/smtpd[19345]: connect from unknown[XXX.YYY.ZZZ.QQQ]
CentOS 7 – still discovering it. ClamAV & ClamAV Milter related things have changed a bit.
Roundcube Webmail is a mature and nice enough web email interface. The installation process is pretty simple: you need to download the package, unpack it, copy it to the web folder, create a database, import the database schema and configure the app. Create the database and the user: mysql-p create database roundcube; grant all on […]
One of biggest problems nowadays is the SPAM or Bulk mails. Added to the initial Postfix’s configuration of RBL’s you can add some further blockers for SPAM that gets thru. Greylisting One of the things you need to know about spammers is that they send tons of spam. They send so much spam that they […]