Asterisk on Raspberry Pi

RaspPBX is a project which brings the free and open source Asterisk and FreePBX into Raspberry Pi board. RaspPBX turns Pi into a communications server which can be used by small businesses with up to 12 extensions. FreePBX is a web-based open source GUI  that controls and manages Asterisk. Our goal is to show installation of the latest RaspPBX into Raspberry Pi 3 Model B Rev 1.2.

The latest image available for download includes Asterisk 13.20.0 and FreePBX 14.0.2.10.

1. Download, Extract and Copy RaspPBX Image to SD Card

$ wget http://download.raspberry-asterisk.org/raspbx-04-04-2018.zip
$ sudo dd bs=4M if=raspbx-04-04-2018.img of=/dev/mmcblk0 status=progress conv=fsync
$ unzip raspbx-04-04-2018.zip

2. Utilize all space on your SD card

By default the image utilizes only 4GB of your SD card space. Login to the console with username root and password raspberry and issue the command below.

# raspi-config

Navigate to Advanced Options-> A1 Expand Filesystem Ensures that all of the SD card storage is available to the OS. The filesystem will be enlarged upon the next reboot.

3. Configure Static IP Address

Set static IP address for interface eth0.

# echo "interface eth0" >> /etc/dhcpcd.conf
# echo Continue reading

BGP Implicit and Explicit Withdraw

BGP Implicit and Explicit Withdraw are important BGP messages. Understanding these two mechanisms not only help for understanding BGP convergence but also helps for BGP path diversity.    While I was explaining BGP Add-Path in my Instructor Led CCDE course, I used the term ‘BGP Implicit Withdraw’ Then someone asked what is ‘ BGP Explicit …

Continue reading "BGP Implicit and Explicit Withdraw"

The post BGP Implicit and Explicit Withdraw appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Whither Network Engineering? (Part 1)

An article on successful writers who end up driving delivery trucks. My current reading in epistemology for an upcoming PhD seminar. An article on the bifurcation of network engineering skills. Several conversations on various slacks I participate in. What do these things have in common? Just this:

What is to become of network engineering?

While it seems obvious network engineering is changing, it is not so easy to say how it is changing, and how network engineers can survive those changes. To better understand these things, it is good to back up and take in a larger view. A good place to start is to think about how networks are built today.

Networks today are built using an appliance and circuit model. To build a network, an “engineer” (we can argue over the meaning of that word) tries to gauge how much traffic needs to be moved between different points in the business’ geographical space, and then tries to understand the shape of that traffic. Is it layer 2, or layer 3? Which application needs priority over some other application?

Once this set of requirements is drawn up, a long discussion over the right appliances and circuits to purchase to Continue reading

Response: Modchips, Hardware Implants and Bloomberg falsehoods

This video was presented at the 35C3 conference in Germany last week. The presenter is highly credible on the topic. Hardware implants and supply chain attacks have been in the news recently, but how feasible are they and what can we do about them? In this talk we’ll examine the design of a proof of […]

The post Response: Modchips, Hardware Implants and Bloomberg falsehoods appeared first on EtherealMind.

AT&T Sells Its Colocation Data Centres

AT&T has finally found a buyer for its colocation business. AT&T Inc announced today that it has completed the sale of its data center colocation operations and assets to Brookfield Infrastructure and its institutional partners (“Brookfield”). The company previously announced a strategic alliance with Brookfield that included the transfer of these operations and assets. Why […]

The post AT&T Sells Its Colocation Data Centres appeared first on EtherealMind.

Flor de Ceibo Conecta2: Sharing Experiences

Today’s guest author is María Julia Morales González, the “Flor de Ceibo Conecta2” project manager and a professor at the Department of Sociology and Interdisciplinary Space of the University of the Republic Uruguay.

The Internet Society Uruguay Chapter, in partnership with the The University of the Republic and the Consejo de Formación en Educación, as well as with financial support from the Beyond the Net Funding Programme, has taken significant steps to help children and teenagers to develop digital skills in a creative and innovative way in three of the nineteen segments in which Uruguay is politically divided: Paysandú, Rivera, and Salto. Their project Flor de Ceibo Conecta2 aims to train young people from disadvantaged communities using digital resources in creative and challenging classes to help them improve their everyday lives and expand their chances for a better future.

Hoy queremos acercarles 2 experiencias que estamos transitando en el Proyecto Flor de Ceibo Conecta2.

Una de ellas se desarrolla en la ciudad de Salto en el liceo N° 7 del Barrio Artigas, zona de alta vulnerabilidad. Allí el equipo está trabajando en el uso de redes sociales y en particular en este taller en referencia al uso de whatsapp.

Se Continue reading

IDG Contributor Network: Did IoT cyberattacks cause NY power transformers to explode?

Officials blamed a power surge for the blackout on Dec. 28th that left LaGuardia airport in the dark for about 45 minutes, grounding flights. A look at the trend of power outages at American airports shows a disturbing pattern and possibly sinister cause.Background Attacking an adversary’s infrastructure is asymmetrical warfare. It causes a lot of damage for a very small cost. Cyberattacks are an ideal weapon as they disguise who might be behind them, making retaliation much harder.  Attacks on the power grid for airports are especially devastating as they ground flights, stranding passengers and disrupting business nationwide. Just take a look at recent power outages:To read this article in full, please click here

History Of Networking – EVPN – Rahul Aggarwal

EVPN is one of the more promising protocols to come out in recent history. In this episode, Rahul Aggarwal joins Network Collective to discuss the history of EVPN and how it came to be.
Rahul Aggarwal
Guest
Russ White
Host
Donald Sharp
Host

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post History Of Networking – EVPN – Rahul Aggarwal appeared first on Network Collective.

How blockchain will transform the IoT

Two giant industrials, Bosch and Volkswagen, are among companies that are taking seriously the idea that the Internet of Things (IoT) and decentralized data marketplaces should co-exist. That means a type of "blockchain meets IoT" is likely in our future.Both German organizations have recently teamed up with fellow-country, decentralized transactional platform IOTA on various development projects. IOTA’s Tangle is a transactional data transfer and settlement system for connected devices.[Also see our corporate guide to addressing IoT security. ] Bosch announced in November that it intends to use a combination of its XDK (Cross Domain development Kit) product (an IoT prototyping and programmable sensor module used as a come-on to get organizations to work with Bosch on custom mass production and series engineering), and morph XDK with IOTA marketplace along a masked communications channel.To read this article in full, please click here

The Week in Internet News: India Pushes for Sites to Remove ‘Unlawful’ Content, Break Encryption

Not this again: India’s government wants websites and social media platforms to remove content regulators determine as “unlawful” within 24 hours and to create automated tools to identify this material, BuzzFeed reports. The government also wants the tech companies to trace the source of the content, requiring platforms like WhatsApp to break encryption. This follows passage of an Australian law that forces online services to provide the government there with encryption workarounds.

The Wire of India defends the proposal, however, saying it’s aimed at holding websites and social media platform more responsible for the content they distribute.

More blocking: The government of Sudan has shut down most Internet access in the country and blocked access to social media platforms, Rogue Media Labs says. The government blamed the shutdown on massive protests over income inequality and other issues.

Missed assignments: In a related story, some college students in the Indian region of Kashmir have missed deadlines for submitting online application forms of their bachelors of education examination because of frequent and lengthy Internet shutdowns there, reports Kashmir Reader. Students are asking the University of Kashmir to extend its deadline.

Blockchain vs. national security? An ex-CIA official is targeting blockchain, saying the Continue reading

Six IoT predictions for 2019

This time of year, it can seem like the world is swimming in predictions for the new year, and the Internet of Things (IoT) is no exception. In fact, in fast-evolving areas like IoT, multitudes of trends and opportunities and challenges are in play, making predictions ridiculously easy — just about anything can happen, and probably will.[ Also read: Gartner’s top 10 IoT trends for 2019 and beyond | Get regularly scheduled insights: Sign up for Network World newsletters ] So, my goal here is to identify a set of IoT predictions that are both likely to happen … and likely to have a significant impact on the development and implementation of the technology.To read this article in full, please click here

Six IoT predictions for 2019

This time of year, it can seem like the world is swimming in predictions for the new year, and the Internet of Things (IoT) is no exception. In fact, in fast-evolving areas like IoT, multitudes of trends and opportunities and challenges are in play, making predictions ridiculously easy — just about anything can happen, and probably will.[ Also read: Gartner’s top 10 IoT trends for 2019 and beyond | Get regularly scheduled insights: Sign up for Network World newsletters ] So, my goal here is to identify a set of IoT predictions that are both likely to happen … and likely to have a significant impact on the development and implementation of the technology.To read this article in full, please click here

Six IoT predictions for 2019

This time of year, it can seem like the world is swimming in predictions for the new year, and the Internet of Things (IoT) is no exception. In fact, in fast-evolving areas like IoT, multitudes of trends and opportunities and challenges are in play, making predictions ridiculously easy — just about anything can happen, and probably will.[ Also read: Gartner’s top 10 IoT trends for 2019 and beyond | Get regularly scheduled insights: Sign up for Network World newsletters ] So, my goal here is to identify a set of IoT predictions that are both likely to happen … and likely to have a significant impact on the development and implementation of the technology.To read this article in full, please click here

2019 Is The King of Content

2018 was a year full of excitement and fun. And for me, it was a year full of writing quite a bit. Not only did keep up my writing here for my audience but I also wrote quite a few posts for GestaltIT.com. You can find a list of all the stuff I wrote right here. I took a lot of briefings from up-and-coming companies as well as talking to some other great companies and writing a couple of series about SD-WAN.

It was also a big year for the Gestalt IT Rundown. My co-host with most Rich Stroffolino (@MrAnthropology) and I had a lot of fun looking at news from enterprise IT and some other fun chipset and cryptocurrency news. And I’ve probably burned my last few bridges with Larry Ellison and Mark Zuckerberg to boot. I look forward to recording these episodes every Wednesday and I hope that some of you will join us on the Gestalt IT Facebook page at 12:30 EST as well.

Content Coming Your Way

So, what does that leave in store for 2019? Well, since I hate predictions on an industry scale, that means taking a look at what I Continue reading

CircleCI, Docker and Systemd

I have been battling to get the combination of CircleCI, Docker and systemd to play together. After much frustration, I have a workable solution. Machine Executor, privileged: true, cgroup passthrough, and disabling AppArmor.

Background: CircleCI for Ansible Linting & Checks

In the StackStorm team we use CircleCI with most of our repositories. We check things like code style checks, and run unit tests. With every Pull Request we trigger these checks, and checks must pass before merging. Some repos also use CircleCI for post-merge deployment steps.

We use Ansible and Terraform to manage some of our internal infrastructure. All configurations are stored in Git. All changes to that configuration must be submitted as a Pull Request. All PRs need approval, and all commit checks must pass. We use CircleCI to run these commit checks.

We run multiple checks, but for Ansible playbooks, they include using ansible-lint, and ansible-playbook --syntax-check. We then spin up a Docker container using CircleCI and run some of our playbooks twice, checking that it passes both times, and that the second run records no changes.

Here’s a snippet of some of our CircleCI configuration:

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CircleCI, Docker and Systemd

I have been battling to get the combination of CircleCI, Docker and systemd to play together. After much frustration, I have a workable solution. Machine Executor, privileged: true, cgroup passthrough, and disabling AppArmor.

Background: CircleCI for Ansible Linting & Checks

In the StackStorm team we use CircleCI with most of our repositories. We check things like code style checks, and run unit tests. With every Pull Request we trigger these checks, and checks must pass before merging. Some repos also use CircleCI for post-merge deployment steps.

We use Ansible and Terraform to manage some of our internal infrastructure. All configurations are stored in Git. All changes to that configuration must be submitted as a Pull Request. All PRs need approval, and all commit checks must pass. We use CircleCI to run these commit checks.

We run multiple checks, but for Ansible playbooks, they include using ansible-lint, and ansible-playbook --syntax-check. We then spin up a Docker container using CircleCI and run some of our playbooks twice, checking that it passes both times, and that the second run records no changes.

Here’s a snippet of some of our CircleCI configuration:

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