Network

After a recent OpenStack-Ansible (OSA) deployment on CentOS, I found that keepalived was not starting properly at boot time:

I opened up a noVNC console to a virtual machine today in my OpenStack cloud but found that the console wouldn’t take keyboard input.

Thanks to everyone who attended my talk at the OpenStack Summit in Barcelona!

I ran into an interesting problem recently in my production OpenStack deployment that runs the Mitaka release.

NOTE: This post is a work in progress.

Earlier today, I wrote a post about my first thoughts on the Supermicro 5028D-T4NT server.

My upgrade to Fedora 22 on the ThinkPad X1 Carbon was fairly uneventful and the hiccups were minor.

There are some situations where you want to do the opposite of creating a wireless hotspot and you want to share a wireless connection to an ethernet connection. For example, if you’re at a hotel that offers only WiFi internet access, you could share that connection to an ethernet switch and plug in more devices. Also, you could get online with your wireless connection and create a small NAT network to test a network device without mangling your home network.

There are plenty of guides out there for making ethernet bridges in Linux to support virtual machines using built-in network scripts or NetworkManager.

I do a bunch of Linux-related tasks daily.

Managing firewall rules with iptables can be tricky at times.

Red Hat Enterprise Linux and CentOS 7 users can now install httpry 0.

While using a Dell R720 at work today, we stumbled upon a problem where the predictable network device naming with systemd gave us some unpredictable results.

We’re all familiar with live booting Linux distributions.

Amid all of the Docker buzz at the Red Hat Summit, Project Atomic was launched.

In my previous post about installing Fedora via PXE, I forgot to mention a big time saver for the installation.

Outside of the RHCA exams, I haven’t configured a PXE system for my personal needs.

Changing my ssh port from the default port (22) has been one of my standard processes for quite some time when I build new servers or virtual machines.

Kristóf Kovács has a fantastic post about some lesser-known Linux tools that can really come in handy in different situations.

I’ll be the first one to admit that Kerberos drives me a little insane.

It’s no secret that I’m a big fan of the Routerboard devices and the RouterOS software from Mikrotik that runs on them.

Anyone who has used a 3G ExpressCard or USB stick knows how handy they can be when you need internet access away from home (and away from Wi-Fi).

The guide to redundant cloud hosting that I wrote recently will need some adjustments as I’ve fallen hard for the performance and reliability of DRBD and OCFS2.

One of the most common questions that I see in my favorite IRC channel is: “How can I secure sshd on my server?

As many of you might have noticed from my previous GlusterFS blog post and my various tweets, I’ve been working with GlusterFS in production for my personal hosting needs for just over a month.

After I wrote a recent post on best practices for iptables, I noticed that I forgot to mention comments for iptables rules.

When you need to measure network throughput and capacity, I haven’t found a simpler solution than iperf.

Regardless of the type of hosting you’re using - dedicated or cloud - it’s important to take network interface security seriously.