Site Maintenance

I am performing some site maintenance in conjunction with a move to a new VPS server. (Thank you Hetzner (some irony may be involved)).

Hopefully everything should be reachable, but some minor UI tweaks may occur.

Thanks for understanding.

/Kim

Last Week on ipSpace.net (2019W6)

Last week Howard Marks completed the Hyperconverged Infrastructure Deep Dive trilogy covering smaller HCI players (including Cisco’s Hyperflex) and explaining the intricacies of costing and licensing HCI solutions.

On Thursday I finally managed to start the long-overdue Data Center Interconnects update. The original webinar was recorded in 2011, and while the layer-3 technologies haven’t changed much (with LISP still being mostly a solution in search of a problem), most of the layer-2 technologies I described at that time vanished, with OTV being a notable exception. Keep that in mind the next time your favorite $vendor starts promoting another wonderful technology.

You can get access to both webinars with standard ipSpace.net subscription.

ExFaKT: a framework for explaining facts over knowledge graphs and text

ExFaKT: a framework for explaining facts over knowledge graphs and text Gad-Elrab et al., WSDM’19

Last week we took a look at Graph Neural Networks for learning with structured representations. Another kind of graph of interest for learning and inference is the knowledge graph.

Knowledge Graphs (KGs) are large collections of factual triples of the form \langle subject\ predicate\ object \rangle (SPO) about people, companies, places etc.

Today’s paper choice focuses on the topical area of fact-checking : how do we know whether a candidate fact, which might for example be harvested from a news article or social media post, is likely to be true? For the first generation of knowledge graphs, fact checking was performed manually by human reviewers, but this clearly doesn’t scale to the volume of information published daily. Automated fact checking methods typically produce a numerical score (probability the fact is true), but these scores are hard to understand and justify without a corresponding explanation.

To better support KG curators in deciding the correctness of candidate facts, we propose a novel framework for finding semantically related evidence in Web sources and the underlying KG, and for computing human—comprehensible explanations for facts. We refer to our framework as ExFaKT (Ex Continue reading

How to run stunnel on your Android device

Overview

In this post we’re going to talk about how to run the amazing stunnel program on your Android device, and do so properly!

Later, this would allow us to setup a lot of cool things like:

  • Wrapping OpenVPN traffic with it
  • Using it as a SOCKS VPN
  • Adding proper IMAPS/SMTPS support to our old email apps
  • …

For this, we’re not going to use the old and very limited SSLDroid. It’s a bad idea, I don’t know why different sites still keep pushing it. It almost certainly has unpatched vulnerabilities. Please don’t use it.

Instead, we are going to use the official stunnel program, with the help of a proper wrapper.

stunnel Android binary

stunnel already supports Android devices and even the compiled version of it is available in it’s download page.

This file is compiled for ARM architecture. Even though most Android devices run on ARM, this is particularly important to note for those devices that are not (e.g, Android-x86).

Since we’ll be using the compiled binary, you may need to compile stunnel yourself for your specific Android architecture before continuing1. Chances are though, that your device is running on ARM and you are ready Continue reading

Juniper eBGP

6 steps to configure eBGP. Configure a router-id Configure an autonomous system number Configure a BGP group and define the peer type Add neighbors to the peer group Define a routing policy to export routes Assign the routing policy to the BGP group Configuration ...continue reading

Building static routes with ExaBGP

In our last post we covered the basic setup and configuration of ExaBGP. While we were able to make use of ExaBGP for dynamic route advertisement, it wasn’t able to help us when it came to actually programming the servers routing table. In this post, I want to show you how you can leverage ExaBGP from a more programatic perspective. We’ll start by handling route advertisement to our peer and then tackle reading and processing received route updates. We’ll also start using another Python module (pyroute2) to program the routing table of the bgp_server host so that it begins acting more like a normal router. Enough talk – let’s dive in!

Im going to assume you’re starting off at the end of the last post. So the first thing we need to do is clean up a couple of items. We’re not going to rely on the static route we provisioned so to clean that up we can simply reapply the netplan network configuration using the command sudo netplan apply…

user@bgp_peer:~$ ip route
default via 192.168.127.100 dev ens3 proto static 
10.10.10.0/30 dev ens7 proto kernel scope link src 10.10.10.1 
10. Continue reading

Juniper VRRP

7 steps to configure VRRP. Enable VRRPv3 Define a VRRP group number Configure a virtual IP address Configure a virtual link-local address (IPv6 only) Configure a priority Configure preempt (optional) Configure router advertisement properties (IPv6 only) ...continue reading

Cisco pushes silicon photonics for enterprise, webscale networking

Cisco said it's closed its deal to buy optical-semiconductor firm Luxtera for $660 million, bringing it the advanced optical technology customers will need for speed and throughput for future data-center and webscale networks.When Cisco announced the deal in December, Rob Salvagno, Cisco's vice president of Corporate Business Development, said, “As system port capacity increases from 100GbE to 400GbE and beyond, optics plays an increasingly important role in addressing network infrastructure constraints, particularly density and power requirements.”To read this article in full, please click here

Cisco pushes silicon photonics for enterprise, webscale networking

Cisco says it's closed its deal to buy optical-semiconductor firm Luxtera for $660 million bringing it the advanced optical technology customers will need for speed and throughput for future data-center and webscale networks.When Cisco announced the deal in December, Rob Salvagno, Cisco vice president of Corporate Business Development, said, “As system port capacity increases from 100GbE to 400GbE and beyond, optics plays an increasingly important role in addressing network infrastructure constraints, particularly density and power requirements.”To read this article in full, please click here

Cisco pushes silicon photonics for enterprise, webscale networking

Cisco says it's closed its deal to buy optical-semiconductor firm Luxtera for $660 million bringing it the advanced optical technology customers will need for speed and throughput for future data-center and webscale networks.When Cisco announced the deal in December, Rob Salvagno, Cisco vice president of Corporate Business Development, said, “As system port capacity increases from 100GbE to 400GbE and beyond, optics plays an increasingly important role in addressing network infrastructure constraints, particularly density and power requirements.”To read this article in full, please click here

Cisco pushes silicon photonics for enterprise, webscale networking

Cisco says it's closed its deal to buy optical-semiconductor firm Luxtera for $660 million bringing it the advanced optical technology customers will need for speed and throughput for future data-center and webscale networks.When Cisco announced the deal in December, Rob Salvagno, Cisco vice president of Corporate Business Development, said, “As system port capacity increases from 100GbE to 400GbE and beyond, optics plays an increasingly important role in addressing network infrastructure constraints, particularly density and power requirements.”To read this article in full, please click here

Dell CTO talks modern data centers, the edge, and digital disruption

Dell’s CTO has laid out the company’s vision of where enterprise technology is headed in 2019, and it’s not what people were predicting a few years ago.Gone is the talk of the demise of the data center. Instead, the data center is being repurposed, and some of its tasks are being moved to the edge, said Robert Hormuth, CTO and vice president of Dell EMC Server Infrastructure Solutions. This, he said, is a time to be disruptive before your competition.[ Read also: Edge computing best practices and Edge computing is the place to address a host of IoT security concerns | Get regularly scheduled insights: Sign up for Network World newsletters ] In a recent blog post, Hormuth said IT must be the enabler of the transformational journey for IT. “Businesses must transform and embrace the digital world, or get run over by a new, more agile competitor with a new business model benefiting from advanced technologies like data analytics, AI, ML, and DL. No business is safe from the wave of digital disruption,” he wrote.To read this article in full, please click here

Dell CTO talks modern data centers, the edge, and digital disruption

Dell’s CTO has laid out the company’s vision of where enterprise technology is headed in 2019, and it’s not what people were predicting a few years ago.Gone is the talk of the demise of the data center. Instead, the data center is being repurposed, and some of its tasks are being moved to the edge, said Robert Hormuth, CTO and vice president of Dell EMC Server Infrastructure Solutions. This, he said, is a time to be disruptive before your competition.[ Read also: Edge computing best practices and Edge computing is the place to address a host of IoT security concerns | Get regularly scheduled insights: Sign up for Network World newsletters ] In a recent blog post, Hormuth said IT must be the enabler of the transformational journey for IT. “Businesses must transform and embrace the digital world, or get run over by a new, more agile competitor with a new business model benefiting from advanced technologies like data analytics, AI, ML, and DL. No business is safe from the wave of digital disruption,” he wrote.To read this article in full, please click here

Dell CTO talks modern data centers, the edge, and digital disruption

Dell’s CTO has laid out the company’s vision of where enterprise technology is headed in 2019, and it’s not what people were predicting a few years ago.Gone is the talk of the demise of the data center. Instead, the data center is being repurposed, and some of its tasks are being moved to the edge, said Robert Hormuth, CTO and vice president of Dell EMC Server Infrastructure Solutions. This, he said, is a time to be disruptive before your competition.[ Read also: Edge computing best practices and Edge computing is the place to address a host of IoT security concerns | Get regularly scheduled insights: Sign up for Network World newsletters ] In a recent blog post, Hormuth said IT must be the enabler of the transformational journey for IT. “Businesses must transform and embrace the digital world, or get run over by a new, more agile competitor with a new business model benefiting from advanced technologies like data analytics, AI, ML, and DL. No business is safe from the wave of digital disruption,” he wrote.To read this article in full, please click here

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