Bastion Hosts and Custom SSH Configurations

The idea of an SSH bastion host is something I discussed here about 18 months ago. For the most part, it’s a pretty simple concept (yes, things can get quite complex in some situations, but I think these are largely corner cases). For the last few months, though, I’ve been trying to use an SSH bastion host and failing, and I could not figure out why it wouldn’t work. The answer, it turns out, lies in custom SSH configurations.

In my introduction on using SSH bastion hosts (linked above)—or in just about any tutorial out there on using SSH bastion hosts—brief mention is made of adding configuration information to SSH to use the bastion host. Borrowing from my original post, if you had an instance named “private1” that you wanted to access via a bastion named “bastion”, the SSH configuration information might look like this:

Host private1
  IdentityFile ~/.ssh/rsa_private_key
  ProxyCommand ssh user@bastion -W %h:%p

Host bastion
  IdentityFile ~/.ssh/rsa_private_key

Normally, that information would go into ~/.ssh/config, which is the default SSH configuration file.

In my case, I only allow public key authentication to “trusted” systems (I vaguely recall an article I read a while ago about a Continue reading

Bastion Hosts and Custom SSH Configurations

The idea of an SSH bastion host is something I discussed here about 18 months ago. For the most part, it’s a pretty simple concept (yes, things can get quite complex in some situations, but I think these are largely corner cases). For the last few months, though, I’ve been trying to use an SSH bastion host and failing, and I could not figure out why it wouldn’t work. The answer, it turns out, lies in custom SSH configurations.

In my introduction on using SSH bastion hosts (linked above)—or in just about any tutorial out there on using SSH bastion hosts—brief mention is made of adding configuration information to SSH to use the bastion host. Borrowing from my original post, if you had an instance named “private1” that you wanted to access via a bastion named “bastion”, the SSH configuration information might look like this:

Host private1
  IdentityFile ~/.ssh/rsa_private_key
  ProxyCommand ssh user@bastion -W %h:%p

Host bastion
  IdentityFile ~/.ssh/rsa_private_key

Normally, that information would go into ~/.ssh/config, which is the default SSH configuration file.

In my case, I only allow public key authentication to “trusted” systems (I vaguely recall an article I read a while ago about a Continue reading

Technology Short Take #83

Welcome to Technology Short Take #83! This is a slightly shorter TST than usual, which might be a nice break from the typical information overload. In any case, enjoy!

Networking

• I enjoyed Dave McCrory’s series on the future of the network (see part 1, part 2, part 3, and part 4—part 5 hadn’t gone live yet when I published this). In my humble opinion, he’s spot on in his viewpoint that network equipment is increasingly becoming more like servers, so why not embed services and functions in the network equipment? However, this isn’t enough; you also need a strong control plane to help manage and coordinate these services. Perhaps Istio will help provide that control plane, though I suspect something more will be needed.
• Michael Kashin has a handy little tool that functions like ssh-copy-id on servers, but for network devices (leveraging Netmiko). Check out the GitHub repository.
• Anthony Shaw has a good comparison of Ansible, StackStorm, and Salt (with a particular view at applicability in a networking context). This one is definitely worth a read, in my opinion.
• Miguel Gómez of Telefónica Engineering discusses maximizing performance in VXLAN overlay networks.
• Nicolas Michel has a good Continue reading

Bastion Hosts and Custom SSH Configurations

The idea of an SSH bastion host is something I discussed here about 18 months ago. For the most part, it’s a pretty simple concept (yes, things can get quite complex in some situations, but I think these are largely corner cases). For the last few months, though, I’ve been trying to use an SSH bastion host and failing, and I could not figure out why it wouldn’t work. The answer, it turns out, lies in custom SSH configurations.

In my introduction on using SSH bastion hosts (linked above)—or in just about any tutorial out there on using SSH bastion hosts—brief mention is made of adding configuration information to SSH to use the bastion host. Borrowing from my original post, if you had an instance named “private1” that you wanted to access via a bastion named “bastion”, the SSH configuration information might look like this:

Host private1
  IdentityFile ~/.ssh/rsa_private_key
  ProxyCommand ssh user@bastion -W %h:%p

Host bastion
  IdentityFile ~/.ssh/rsa_private_key

Normally, that information would go into ~/.ssh/config, which is the default SSH configuration file.

In my case, I only allow public key authentication to “trusted” systems (I vaguely recall an article I read a while ago about a Continue reading

Technology Short Take #83

Welcome to Technology Short Take #83! This is a slightly shorter TST than usual, which might be a nice break from the typical information overload. In any case, enjoy!

Networking

• I enjoyed Dave McCrory’s series on the future of the network (see part 1, part 2, part 3, and part 4—part 5 hadn’t gone live yet when I published this). In my humble opinion, he’s spot on in his viewpoint that network equipment is increasingly becoming more like servers, so why not embed services and functions in the network equipment? However, this isn’t enough; you also need a strong control plane to help manage and coordinate these services. Perhaps Istio will help provide that control plane, though I suspect something more will be needed.
• Michael Kashin has a handy little tool that functions like ssh-copy-id on servers, but for network devices (leveraging Netmiko). Check out the GitHub repository.
• Anthony Shaw has a good comparison of Ansible, StackStorm, and Salt (with a particular view at applicability in a networking context). This one is definitely worth a read, in my opinion.
• Miguel Gómez of Telefónica Engineering discusses maximizing performance in VXLAN overlay networks.
• Nicolas Michel has a good Continue reading

Get involved with the Moby Project by attending upcoming Moby Summits!

Last month at DockerCon, we introduced the Moby Project: an open-source project sponsored by Docker to advance the software containerization movement. The idea behind the project is to help the ecosystem take containers mainstream by providing a library of components, a framework for assembling them into custom container-based systems and a place for all container enthusiasts to experiment and exchange ideas. Going forward, Docker will be assembled using Moby, see Moby and Docker or the diagram below for more details.

Moby Summit at DockerCon 2017

Knowing that that a good number of maintainers, contributors and advanced Docker users would be attending DockerCon, we decided to organize the first Moby Summit in collaboration with the Cloud Native Computing Foundation (CNCF). The summit was a small collaborative event for container hackers who are actively maintaining, contributing or generally involved or interested in the design and development of components of the Moby project library in particular: LinuxKit, containerd, Infrakit, SwarmKit, libnetwork and Notary.

Here’s what we covered during the first part of the summit:

• 0:05 – Opening words by Patrick Chanezon
• 9:05 – Moby Project Q&A with Solomon Hykes and Justin Cormack
• 60:14 – Quick update on containerd by Michael Continue reading

How to conduct an IoT pen test

Penetration testing was much like taking a battering ram to the door of the fortress. Keep pounding away and maybe find a secret backdoor to enter through. But what happens if pieces of the network are outside of the fortress? With the flurry of Internet of Things devices, is it harder to conduct a pen test with that many devices and end points?Claud Xiao, principal security researcher, Unit 42 at Palo Alto Networks, said for just testing some network services on IoT devices in a black box way, the difficulty level and the steps are similar with regular pen testing. But if you're discovering vulnerabilities via analyzing firmware or via analyzing wireless communications (e.g., Bluetooth or ZigBee), that's much harder.To read this article in full or to leave a comment, please click here

How to conduct an IoT pen test

Penetration testing was much like taking a battering ram to the door of the fortress. Keep pounding away and maybe find a secret backdoor to enter through. But what happens if pieces of the network are outside of the fortress? With the flurry of Internet of Things devices, is it harder to conduct a pen test with that many devices and end points?Claud Xiao, principal security researcher, Unit 42 at Palo Alto Networks, said for just testing some network services on IoT devices in a black box way, the difficulty level and the steps are similar with regular pen testing. But if you're discovering vulnerabilities via analyzing firmware or via analyzing wireless communications (e.g., Bluetooth or ZigBee), that's much harder.To read this article in full or to leave a comment, please click here

Sprint Builds its 5G Clout Through Open Source, NYU Affiliation

“We need network architects to think like software architects.”

Cloudera’s PaaS Targets Big Data Workloads Running in the Cloud

The service is available on AWS and will soon expand to other public clouds.

Get 63% off This 76-in-1 Precision Tool Set For Smartphones, Laptops and Electronics – Deal Alert

This 76-piece repair kit contains everything you need to work on your smartphone, tablet, laptop, stereo, or anything else that requires precision instruments. Everything from screwdrivers, to a suction cup to a plastic spudger, whatever that might be. This kit is highly rated and a #1 best seller on Amazon, where its typical list price of $69.99 has been reduced 63% to $25.99. See this deal now on Amazon.To read this article in full or to leave a comment, please click here

CCNA Wireless – CCNA Wireless Notes Chapter 2

ITU-R

A telecommunications regulatory body that regulates or decides how different parts of the RF spectrum may be used. Countries can also have own regulatory bodies that regulate the spectrum within the country. Maintains spectrum in three different regions:

Region 1: Europe, Africa, Northern Asia
Region 2: North and South America
Region 3: Southern Asia and Australiasa

Most bands in the RF spectrum are tightly regulated and require a license. Using a frequency in a licensed range requires an organization to submit an application to the regulatory body.

ITU-R allocated two two ranges for Industrial, Scientific and Medical (ISM) use:

2.400 to 2500 GHz
5.725 to 5.825 GHz

ISM bands are unlicensed and anyone can use them.

Unlicensed bands are more vulnerable to interference and noise due to them being more accessible.

FCC

Federal Communications Commission (FCC) regulates RF frequencies, channels and transmission power within the US but other countries may also follow the rules of the FCC. FCC has allocated Unlicensed National Information Infrastructure (U-NII) in addition to the ISM band. Consists of four bands in the 5 GHz band.

U-NII-1 5.15 to 5.25 GHz
U-NII-2 5.25 to 5.35 GHz
U-NII-2 Extended Continue reading

Eight steps to the GDPR countdown

One year from today, the recently passed regulation known as “GDPR” (General Data Protection Regulation) goes into effect. While EU-specific, it can still dramatically affect how businesses that work with personal data of citizens and residents of the EU. GDPR was approved a year ago and will be going into effect in another year. It applies directly to organizations within the EU, but also applies to organizations outside the EU if they 1) offer goods and services to the EU, 2) monitor the behavior EU subjects, or 3) process or retain personal data of EU citizens and residents. And the regulation can place very serious fines and sanctions for non-compliance.To read this article in full or to leave a comment, please click here

Eight steps to the GDPR countdown

With only one year until this business-changing regulation goes into effect, it's time for companies to start planning their approach. Let's run through eight steps you can take to be ready.

IDG Contributor Network: SAP sets a course for the future

At its massive customer conference held last week in Orlando, SAP made it clear that it was charting a new course for the future. In announcing Leonardo — what it calls a digital innovation system — and in interviews with company executives, the message was unambiguous: SAP is an important part of the enterprise digital transformation story.While the messaging around Leonardo was a bit muddled and at times felt like a bucket of buzzwords, it represents a decisive step forward in its effort to transform the company from a legacy, back-office technology player into the enterprise’s digital transformation platform and enabler of choice. According to its press release, the goal of Leonardo is to, “enable customers to rapidly innovate and scale that innovation to redefine their business for the digital world.”To read this article in full or to leave a comment, please click here

IDG Contributor Network: IoT devices-as-a-service through Angaza’s SMS based installment payment plan

Can rent-to-buy plans make IoT devices affordable for thousands who need them, but can't afford to buy one?Solar panels can help African farmers with lighting and power, but are often out of reach. How can the purchase price be split into small installment payments that are manageable. How can IoT enable such a business model? How can low-cost devices communicate when both cellular and radio based transmitters aren't viable? How are such devices distributed and payments collected across a vast continent?Angaza’s approach combines IoT devices enabled with SMS based installment payments. BackgroundAround 1.2 billion people live without access to electricity. Off-grid energy appliances and services can address this issue, especially in developing countries. The Global Off-Grid Lighting Association (GOGLA) expects the off-grid energy and appliance market to be a $50 billion per year opportunity.To read this article in full or to leave a comment, please click here

Worth Reading: Who controls the Internet?

Who controls the Internet? How much influence do they have? And what would happen if one of those parties launched an attack or was compromised and used to launch an attack? Previous works have looked at the individual core services, but this paper focuses on their inter-dependencies along attack propagation paths. —the morning paper

The post Worth Reading: Who controls the Internet? appeared first on rule 11 reader.

Donald Trump uses an iPhone with a single app: Twitter

Among the many things we know about Donald Trump, his love of Twitter is perhaps his most comical passion. Whereas previous Presidents and even current politicians tend to tweet sparingly, Trump has a deep affinity for the social networking app and is prone to firing off tweetstorms and incendiary tweets at any given time. In the run-up to the 2016 U.S. Presidential election, for example, Trump made headlines when he went after former Miss Universe Alicia Machado on Twitter at 3 in the morning.Given Trump's love for all things Twitter, it remained unclear if Trump would continue his Tweeting ways once assuming the Oval Office. At the time, many people speculated that the responsibilities of being President, not to mention the strict security guidelines the President has to follow with respect to electronic devices, would result in Trump effectively kissing his Twitter stardom goodbye. Not to fear, Trump hasn't slowed down his tweeting since becoming President earlier this year.To read this article in full or to leave a comment, please click here

Logistics in Application Path of Neural Networks

Accurately forecasting resource demand within the supply chain has never been easy, particular given the constantly changing nature of the data over periods of time.

What may have been true in measurements around demand or logistics one minute might be entirely different an hour, day or week later, which can throw off a short-term load forecast (STLF) and lead to costly over- or under-estimations, which in turn can lead to too much or too little supply.

To improve such forecasts, there are multiple efforts underway to create new models that can more accurately predict load needs, and while they have …

Logistics in Application Path of Neural Networks was written by Jeffrey Burt at The Next Platform.

Rackspace Acquires TriCore Solutions, Names Eazor as CEO

Its new CEO comes from EarthLink, where he led the company's acquisition by Windstream.