Tue. Oct 19th, 2021


A facebook, instagram, On Monday, WhatsApp and Oculus Outage pushed every corner of Mark Zuckerberg’s empire offline. This is a social media blackout that can be described as the most generous “thorough” and it can prove particularly difficult to fix.

Facebook itself has not confirmed the root cause of its grief, but there are plenty of signals on the Internet. The family of the company’s app effectively surfs the Internet at 11:40 a.m. ET Domain name system Records not accessible. DNS is often called the phone book of the Internet; The URL tab that you type in host names – such as Facebook.com – translates it to the IP address where those sites are located.

DNS accidents are fairly common, and when suspected They are a reason why a given site has gone down. These can occur for all sorts of physical technical reasons, often related to configuration problems and can be relatively straightforward to solve. In this case, though, something more serious seems to be going on.

“Facebook’s disruption is due to DNS; However, this is just a symptom of the problem. The basic problem মু and other experts agree যে is that Facebook has withdrawn the so-called Border Gateway protocol route that has the IP address of the DNS nameserver, Mursh said. If DNS is a phone book on the Internet, BGP is the system on the hall; It decides which route data information travels the superhighway.

“You might think it’s a telephone game, but instead of people playing, it’s a small network that tells each other how to reach them,” said Angelique Medina, director of product marketing at network monitoring firm Cisco Thousandize. “They announce this path to their neighbors and their neighbors will spread it to their peers.”

It’s a lot of jargon, but in simple terms: Facebook has fallen off the map of the Internet. What if you try to ping those IP addresses right now? “The packets end up in a black hole,” Morsh said.

A map shows where Facebook can’t be reached due to DNS resolution failure – basically, it’s everywhere, all together.

Courtesy Cisco Thousand Eyes

The obvious and still unresolved question is why those BGP routes disappeared in the first place. It is not a common disease, especially on this scale or for this period. Facebook said nothing outside of a tweet that it was “working to get things back to normal as soon as possible.” But Internet infrastructure experts who spoke to Wired all suggested that the possible answer was a misconfiguration from Facebook. “It looks like Facebook has done something with their routers, which connect the Facebook network to the rest of the Internet,” said John Graham-Cumming, CTO of Internet infrastructure company Cloudflare. What happened. After all, he says, the Internet is essentially a network of networks, each advertising its presence to each other. For once, Facebook stopped advertising.



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