Tags » SysAdmin

Hello macOS Sierra, bye bye El Cap

We welcome the beautiful and wonderful macOS Sierra (10.12) and say good bye to the old and weary El Capitan (OS X 10.11.6)…. Wait, not so fast. 231 more words


How to connect complex networking infrastructures with Open vSwitch and LXC containers

Some days ago, I learned How to create a overlay network using Open vSwitch in order to connect LXC containers. In order to extend the features of the set-up that I did there, I wanted to introduce some services: a DHCP server, a router, etc. 1,914 more words


disable or enable ipv6 ssh

You may experience problems with ssh and ipv6. If so edit the /etc/ssh/sshd_config file
and enable the ListenAddress option. You can also enable (unpound) the ipv6… 31 more words


Service Window: git.kolab.org migration

It’s been a while since we last updated Phabricator, and it’s been a while since the overall system that runs git.kolab.org was paid attention to. 51 more words

Creating A Bootable USB Thumb Drive For Kali Linux

Welcome back friends, here’s a quick tutorial on how to create a bootable USB thumb drive for Kali Linux using Mint 18.  First head over to… 156 more words


How to create a overlay network using Open vSwitch in order to connect LXC containers.

Open vSwitch (OVS) is a virtual switch implementation that can be used as a tool for Software Defined Network (SDN). The concepts managed by OVS are the same as the concepts managed by hardware switches (ports, routes, etc.). 1,769 more words


Fixing ssl/tls vulnerabilities on CentOS 7.1

OpenSSL 1.0.1e is the latest available version for CentOS 7.1
By default, all ciphers and macs are enabled. To fix the SSL/TLS vulnerabilities, the weak ciphers and macs must be explicitly disabled as follows. 90 more words