Networks

Happy 50th Birthday Ethernet

ome 50 years ago, at the Palo Alto Research Centre of that renowned photocopier company Xerox, a revolutionary approach to local digital networks was born. On the 22nd of May 1973, Bob Metcalf authored a memo that described "X-Wire," a 3Mbps common bus office network system developed at Xerox's Palo Alto Research Center (PARC). more

Cisco Collaboration Summit - Where Unified Communications Could Be Going

This year's Cisco Collaboration Summit was a step up from last year, and I say that for good reason. Last year's event was good -- all of Cisco's events are good -- but the venue was too small and it took away from the messaging. For 2010, Cisco went out of town to the classy and classic Arizona Biltmore in Phoenix. They don't build them like this anymore, and to me, this setting did far more justice for what Cisco has to say about collaboration. more

Call for Participation - DNSSEC Workshop at ICANN 54 in Dublin, Ireland

Would you like to present an idea you have related to DNSSEC or DANE to a gathering of people within the DNSSEC community? Do you have an idea for a new tool or service? Have you recently implemented DNSSEC or DANE and want to share your story? The deadline is Monday, August 17, so please send your proposal soon! We are open to proposals on a wide range of topics... more

Name Collisions II - A Call for Research

This post is a heads up to all uber-geeks about a terrific research initiative to try to figure out causes and mitigation of name-collision risk. There's a $50,000 prize for the first-place paper, a $25,000 prize for the second place paper and up to five $10,000 prizes for third-place papers. That kind of money could buy a lot of toys, my peepul. And the presentation of those papers will be in London -- my favorite town for curry this side of India. Interested? Read on. more

Cybersecurity Considerations in the Work-From-Home Era

Verisign is deeply committed to protecting our critical internet infrastructure from potential cybersecurity threats, and to keeping up to date on the changing cyber landscape. Over the years, cybercriminals have grown more sophisticated, adapting to changing business practices and diversifying their approaches in non-traditional ways. We have seen security threats continue to evolve in 2020, as many businesses have shifted to a work from home posture due to the COVID-19 pandemic. more

Do We Need IPv4 at Home/SOHO Any More?

CLAT/NAT64 is utilized across many mobile networks globally, and I am only talking about Ethernet and Wi-Fi in home and small office/home office (SOHO) environments. I experimented by completely disabling IPv4 at home and established a SSID where my MacBook Pro operates without an actual IPv4 address. The MacBook supports CLAT (RFC 6877), and by implementing PREF64 (RFC 8781) and DHCP Option 108 (RFC 8925) in my network, I was able to achieve a 100% IPv6 environment. more

Big Internet Outages - There Is No Such Thing as a Routine Software Upgrade

Last year I wrote about big disruptive outages on the T-Mobile and the CenturyLink networks. Those outages demonstrate how a single circuit failure on a transport route or a single software error in a data center can spread quickly and cause big outages. I join a lot of the industry in blaming the spread of these outages on the concentration and centralization of networks where the nationwide routing of big networks is now controlled by only a handful of technicians in a few locations. In early October, we saw the granddaddy of all network outages... more

From Net Neutrality to Seizing Opportunity

Network neutrality is important in the context of assuring the opportunity to innovate in how we communicate and connect. We can't define it in terms of specific outcomes but rather in terms of what we enable. The Internet is just one example of what we can do when given the opportunity to use software to fashion our own solutions... I thought about this more when I found myself in my hospital room (after knee surgery) unable to open and close the shades by myself. But yet I could control the lights in my house! more

Disruptive Google Fiber Is Shaking up the Telco World

The Google Fiber project is receiving international attention. This in itself is a good thing, since it brings the benefits of high-speed FttH infrastructure to the attention of large numbers of people in business and government who will not have to deal with such developments on a regular basis... At the same time we have to look at Google Fiber from the point of view of operating in the American regulatory environment. Yes, we can all learn from its disruptive model, and particularly when the results of the more innovative elements of the services begin to kick in; but for other reasons there is no way that this model can be replicated elsewhere. more

Iranian Protesters Urged Not to DDoS Gov Sites, Could Backfire as Country’s Networks Are Centralized

In the midst of heavy demonstrations in the street of Iran against current regime and controversial election results, online activist have began organizing online attacks against government websites. Activists are asking supporters to use tools currently being spread via Twitter, Facebook, and other social networking sites to participate in the attack. However as one blogger writes, the attack might in fact back fire in a country like Iran where network infrastructure is relatively centralized... more

China’s QUESS and Quantum Communications

In mid-August China launched "QUESS" (Quantum Experiments at Space Scale), a new type of satellite that it hopes will be capable of "quantum communications" which is supposed to be hack-proof, through the use of "quantum entanglement". This allows the operator to ensure that no one else is listening to your communications by reliably distributing keys that are then used for encryption in order to be absolutely sure that there is no one in the middle intercepting that information. more

Global Spam Levels Drop Following Certain Events

If you haven't noticed lately, spam levels around the world have started dropping especially in October after a couple of events occurred. The first is a Russian crackdown on alleged spam king Igor Gusev, thought to be involved in the operations of SpamIt.com. SpamIt mysteriously shut down in late September, perhaps because Gusev caught wind of law enforcement starting to take notice of him. more

IPv6 Security Considerations

When rolling out a new protocol such as IPv6, it is useful to consider the changes to security posture, particularly the network's attack surface. While protocol security discussions are widely available, there is often not "one place" where you can go to get information about potential attacks, references to research about those attacks, potential counters, and operational challenges. more

Internet Root Servers Hit with Unusual DNS Amplification Attack

On Nov. 30 and Dec. 1, several of the Internet Domain Name System's root name servers received high rate of suspicious queries, reaching as high as 5 million queries per second, according to a report released by the Root Server System Advisory Council. The incident has been categorized as a unique type of DNS amplification attack. more

The Evolution of 5G

Technology always evolves, and I've been reading about where scientists envision the evolution of 5G. The first generation of 5G, which will be rolled out over the next 3-5 years, is mostly aimed at increasing the throughput of cellular networks. According to Cisco, North American cellular data volumes are growing at a torrid 36% per year, and even faster than that in some urban markets where the volumes of data are doubling every two years. The main goal of the first-generation 5G is to increase network capacity to handle that growth. more