Jump-start a successful IoT journey.
Update: The problem described in this article was logged with JTAC. It took a while but eventually they informed me they had resolved an issue with provisioning VMX in the Junosphere system. I have tried it since and the issue does appear to have gone away. However I am leaving this post up in case it has simply become more intermittent. Please let me know if you experience a situation like what is described below.
I usually use the ‘experimental’ VMX in my Junosphere topologies because I don’t like the VJX all that much. The VJX has security code in it, so it’s not quite like an MX really. Also I’ve seen oddities where it came up in flow mode with a default firewall policy of denying everything, and I was never able to work out why.
So instead I use the VMX for everything – which is better these days because it doesn’t use two VM units for the data and control planes like it used to. Why VMX is still ‘experimental’ after so long is a mystery to me.
However one thing just keeps cropping up with this that is just Continue reading
I usually use the ‘experimental’ VMX in my Junosphere topologies because I don’t like the VJX all that much. The VJX has security code in it, so it’s not quite like an MX really. Also I’ve seen oddities where it came up in flow mode with a default firewall policy of denying everything, and I was never able to work out why.
So instead I use the VMX for everything – which is better these days because it doesn’t use two VM units for the data and control planes like it used to. Why VMX is still ‘experimental’ after so long is a mystery to me.
However one thing just keeps cropping up with this that is just a bit annoying. Every so often I start a topology I know was working, but one or more routers aren’t accessible for some reason. The problem is usually caused by the way Junosphere has put the management address onto the VM. To get access to the VM you instead need to telnet to it via the console server at 10.233.255.254 using a specific port number
The fxp0 IP address should be created in the Continue reading
I’ve been doing a lot of reading and video watching on securing industrial control and automation systems (ICAS) (sometimes referred to as SCADA systems) so this POI has a few links related to that and ends with a link to an editorial piece about privacy and why privacy matters to us all.
This is a funny but also educational and truthful presentation by James Arlen that every IT person needs to watch if they intent to work with and gain any credibility with their counterparts in Operations Technology (OT).
https://www.digitalbond.com/tools/quickdraw/
https://github.com/digitalbond/quickdraw
Quickdraw is a set of IDS/IPS signatures for Snort (and other IDS/IPS software that understands the Snort rule language) that deals specifically with ICAS protocols such as DNP3, Modbus/TCP, and EtherNet/IP. The rules appear to be generic in nature and not focused on any particular ICAS vendor equipment.
Digital Bond also wrote Snort preprocessors for DNP3, EtherNet/IP, and Modbus/TCP which some of the rules depend on. I tried browsing through Digital Bond’s diffs to Snort 2.8.5.3 but they are very hard to read because the Continue reading
While prior versions of the Ansible Tower documentation focused on a single PDF, we've gone in a different direction for this release. You will still have all of the great content available from earlier releases, but in a documentation set comprised of guides focused on getting you going, installation and reference, administration, and more. I have to say that all of the outstanding documentation that was created for prior versions gave me a strong foundation to work with for this release and I'm grateful for the hard work put in before I joined the Ansible team.
With Ansible Tower 2.2, we are ensuring that access to HTML as well as PDF versions of the Tower documents are easily available from the docs website. Our Ansible Tower HTML documents also look and feel more similar to the Ansible documentation available online that you've come to know and love. And, they've been indexed to help you find the information you need as quickly as possible.
First, we're introducing Ansible Tower to new users with our Quick Installation and Quick Setup Guides. These manuals are geared toward getting Ansible Tower installed and setup to the point of running a simple playbook. They Continue reading
One of the topics I’m addressing in the Enterprise IPv6 101 webinar (after all, it’s an introductory-level webinar) is the question of “what exactly is IPv6”. After all the promises, myths, in the end it turns out all we got were bigger addresses (and ton of additional complexity).