Lumen aka CenturyLink is generating routing incidents via former Level3 network, again
Radar

AS203, belonging to what was formerly known as "Level3", acquired by "CenturyLink" in 2016, latter rebranded as "Lumen" in 2020, is a frequent visitor within the incident reports of the Qrator.Radar team. We are not here to blame anyone, but such occurrence of routing incidents for a single organization is worrying - we hope this article would help you to understand how even a small event could reach enormous impact with specific prerequisites met.

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Cybersecurity Newsletter, October 12 - 18
Qrator

Welcome to the regular networking and cybersecurity newsletter. Let's take a look at the most interesting articles published between October 12 and 18, 2020.

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Cybersecurity Newsletter, October 5 - 11
Qrator

Hello and welcome to the regular networking and cybersecurity newsletter! Relevant articles published between October 5 and October 11, 2020, are following. 

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Cybersecurity Newsletter, September 28 - October 4
Qrator

Welcome to the regular networking and cybersecurity newsletter, brought to you by Qrator Labs!
This time we are interested in the most interesting materials published between September 28 and October 4, 2020.

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AS1221 hijacking 266 ASNs in 51 countries
Radar

On Tuesday, September 29, 2020 AS1221 - Telstra announced 472 prefixes in a BGP hijack event that affected 266 other ASNs in 50 countries, with the most damage rendered to the U.S. and U.K. based networks. Worldwide it affected more than 1680 IPv4 prefixes, creating almost 2000 path challenge conflicts.

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Cybersecurity Newsletter, September 21 - 27
Qrator

Welcome to the regular networking and cybersecurity newsletter. 
Let's take a look at the relevant articles published between September 21 and 27, 2020. 

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Cybersecurity Newsletter, September 14 - 20
Qrator

Welcome to the networking and cybersecurity newsletter! 
Let's take a look at the interesting articles and repositories published between September 14 and 20, 2020.

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Cybersecurity Newsletter, September 7 - 13
Qrator

Let's take a look at the most relevant materials published between September 7 and 13, 2020.

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The 2020 National Internet Segment Reliability Research
Reports

 

The National Internet Segment Reliability Research explains how the outage of a single Autonomous System might affect the connectivity of the impacted region with the rest of the world. Most of the time, the most critical AS in the region is the dominant ISP on the market, but not always.

As the number of alternate routes between AS’s increases (and do not forget that the Internet stands for “interconnected network” - and each network is an AS), so does the fault-tolerance and stability of the Internet across the globe. Although some paths are from the beginning more important than others, establishing as many alternate routes as possible is the only viable way to ensure an adequately robust network.

The global connectivity of any given AS, regardless of whether it is an international giant or regional player, depends on the quantity and quality of its path to Tier-1 ISPs.

Usually, Tier-1 implies an international company offering global IP transit service over connections with other Tier-1 providers. Nevertheless, there is no guarantee that such connectivity will be maintained all the time. For many ISPs at all “tiers”, losing connection to just one Tier-1 peer would likely render them unreachable from some parts of the world.

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Cybersecurity Newsletter, August 31 - September 6
Qrator

Welcome to the regular networking and cybersecurity newsletter! With this letter, it is all about the most exciting articles published between August 31 and September 6, 2020.

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