Archive

Category Archives for "Networking"

Your Voice Matters: The World Can Learn from Canada’s Inclusive Solutions to Make Citizens Safer Online

Andrew Sullivan presenting at the Canadian IoT event

Canada has shown great leadership in its innovative approach to secure our connected future by drawing on the diverse strengths, backgrounds, and perspectives our country has to offer.

While the wrap up of a collaborative effort to produce policy recommendations to keep us safe online is definitely worth celebrating, the real work for Canadians has just begun.

The Internet has profoundly changed the way we do things, expanding opportunity as it shrinks distances between people, cultures, and ideas. With connected devices hitting the shelves of major Canadian retailers like never before, the Internet of Things (IoT) is adding countless facets to a new era of human potential.

It has also brought new and complex challenges in areas such as privacy and security.

Many of us worry about our security when we log on. Despite recent calls by governments around the world to create regulation to keep citizens and information safe online, it is critical to consider that not one person or government can solve these issues alone.

If there’s anything the world of Internet governance has shown us, it’s that we get better answers to tough questions when a range of experts and interests can meaningfully take part in the Continue reading

Huawei flap should prompt supply chain scrutiny

Aggressive efforts to keep China-based telecom vendor Huawei out of the U.S. market by the Trump administration have thrust a slow-burning debate in the networking space about the security implications of using Chinese-made technology into the limelight over the last two weeks, yet the real-world implications for business users are less than apocalyptic.The basics of the administration's case against Huawei are simple. The company’s close ties to the Chinese government, coupled with China’s history of industrial and political espionage against the U.S., means that its products can’t be trusted not to slip important information back to Beijing. The current crisis is only two weeks old, but  these concerns about Huawei and other China-based tech vendors date back years.To read this article in full, please click here

The Week in Internet News: Broadband Goes to Space

The final countdown: After two delays, SpaceX has launched a rocket containing 60 satellites designed to deliver broadband to Earth-bound people, Marketwatch reports. SpaceX plans to eventually deploy up to 12,000 satellites in an effort to provide broadband service across the globe. SpaceX sees the satellite network as a way to fund future Mars missions.

Banning rural broadband: Moves by U.S. President Donald Trump’s administration to ban products from Chinese telecom hardware company Huawei may hurt rural broadband access, Phys.org says. Many small broadband and mobile providers serving rural areas use inexpensive telecom equipment from Huawei and other Chinese companies.

The (un)connected tractor: Meanwhile, the U.S. is far from the only country facing challenges with rural broadband. Farmers in Brazil often lack access, Reuters reports. Even as many pieces of new farm equipment require Internet access, less than 10 percent of Brazilian farms are connected, according to one estimate.

Dividing line: The Internet is dividing between a Chinese and a Western view of how it should operate, says ABC.net.au. And Chinese companies, aided by their government, are spreading their technologies and philosophies across the globe, the story suggests.

Expensive bugs: An 11-year-old laptop loaded with Continue reading

Pragmatic Debian packaging (2019)

Notice

This guide is an updated version of a previous edition. If you need to target distributions older than Debian Stretch and Ubuntu Bionic, please have a look at the older version instead.

While the creation of Debian packages is abundantly documented, most tutorials are targeted to packages implementing the Debian policy. Moreover, Debian packaging has a reputation of being unnecessarily difficult1 and many people prefer to use less constrained tools2 like fpm or CheckInstall.

However, building Debian packages with the official tools can become straightforward if you bend some rules:

  1. No source package will be generated. Packages will be built directly from a checkout of a VCS repository.

  2. Additional dependencies can be downloaded during build. Packaging individually each dependency is a painstaking work, notably when you have to deal with some fast-paced ecosystems like Java, Javascript and Go.

  3. The produced packages may bundle dependencies. This is likely to raise some concerns about security and long-term maintenance, but this is a common trade-off in many ecosystems, notably Java, Javascript and Go.

The BGP Monitoring Protocol (BMP)

If you run connections to the ‘net at any scale, even if you are an “enterprise” (still a jinxed term, IMHO), you will quickly find it would be very useful to have a time series record of the changes in BGP at your edge. Even if you are an “enterprise,” knowing what changes have taken place in the routes your providers have advertised to you can make a big difference in tracking down an application performance issue, or knowing just when a particular service went off line. Getting this kind of information, however, can be difficult.

BGP is often overloaded for use in data center fabrics, as well (though I look forward to the day when the link state alternatives to this are available, so we can stop using BGP this way). Getting a time series view of BGP updates in a fabric is often crucial to understanding how the fabric converges, and how routing convergence events correlate to application issues.

One solution is to set up the BGP Monitoring Protocol (BMP—an abbreviation within an abbreviation, in the finest engineering tradition).

BMP is described in RFC7854 as a protocol intended to “provide a convenient interface for obtaining route views.” Continue reading

A deeper dive into Linux permissions

Sometimes you see more than just the ordinary r, w, x and - designations when looking at file permissions on Linux. Instead of rwx for the owner, group and other fields in the permissions string, you might see an s or t, as in this example:drwxrwsrwt One way to get a little more clarity on this is to look at the permissions with the stat command. The fourth line of stat’s output displays the file permissions both in octal and string format:$ stat /var/mail File: /var/mail Size: 4096 Blocks: 8 IO Block: 4096 directory Device: 801h/2049d Inode: 1048833 Links: 2 Access: (3777/drwxrwsrwt) Uid: ( 0/ root) Gid: ( 8/ mail) Access: 2019-05-21 19:23:15.769746004 -0400 Modify: 2019-05-21 19:03:48.226656344 -0400 Change: 2019-05-21 19:03:48.226656344 -0400 Birth: - This output reminds us that there are more than nine bits assigned to file permissions. In fact, there are 12. And those extra three bits provide a way to assign permissions beyond the usual read, write and execute — 3777 (binary 011111111111), for example, indicates that two extra settings are in use.To read this article in full, please click here

It’s Time for Another Pet Project

More than a decade ago I decided to start a pet project: a blog describing interesting details of networking technologies. The idea quickly morphed into vendor-neutral webinars - the first one took place in February 2010. A year or two later I had my first guest speaker and as of today we had more than 50 industry experts participating in ipSpace.net webinars and online courses.

In the meantime the ipSpace.net team grew: I had video and audio editors for years, Irena Marčetič took over marketing, logistics, and production in 2018, and we got a team of webinar moderators that will help us with guest speaker webinars (last week we ran the first guest speaker webinar where I didn’t have to be involved - hooray ;)

Read more ...

Dell R610 Ubuntu 1804 Install Error

When attempting to install the Ubuntu 1804 server spin on a Dell R610 I use for labs I encountered an error. The image that is available from the main downloads page links to a live installer. When I tried to install from this image, the installer would crash and restart when trying to...
1 … 1,026 1,027 1,028 1,029 1,030 … 3,442