Facebook, Instagram and WhatsApp experienced a global outage on Wednesday, September 25th. The three services were down for hours after users started complaining of not being able to access them.
The Facebook, Instagram and WhatsApp outage is a question that has been asked by many people. There are many different theories about what caused the outage. Read more in detail here: is facebook down today 2021.
For approximately six to seven hours on Monday evening, Facebook, Instagram, and Whatsapp were unavailable worldwide. Configuration modifications on backbone routers that coordinate network traffic between Facebook data centers, according to the firm, were creating problems.
Facebook made the news on Monday. They apologized and said that the services have been restored and that support staff are trying to restore the full operation as quickly as possible.
In layman’s terms, the problem was caused by DNS names for Facebook and its associated services not being resolved, as well as infrastructure IP addresses being unavailable. According to Cloudflare, it would be the equivalent of someone unplugging all cables from all servers in all of their data centers at the same time.
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Cloudflare first filed an internal issue named “Facebook DNS lookup returning SERVFAIL” at 16:51 UTC because they were concerned that something was amiss with their 126.96.36.199 DNS resolver. However, after further examination, the firm discovered that the problem was far more severe.
The problem was caused by an incorrect configuration update in the backbone routers that coordinated network traffic across Facebook’s data centers, as we previously said. This also affected several of the company’s internal tools, significantly limiting its capacity to identify and address the problem.
Facebook’s erroneous BGP update | Cloudflare
Cloudflare saw a spike in routing modifications from Facebook about 15:40 UTC on Monday, which is when the problem began. Facebook’s services started to vanish from the internet when they sent an erroneous BGP (Border Gateway Protocol) update to its backbone routers.
Facebook had ceased broadcasting its DNS prefix routes at 16:58 UTC. This meant that at least Facebook’s DNS servers were down, preventing Cloudflare’s 188.8.131.52 DNS resolver from responding to any Instagram or Facebook queries.
Other Facebook IP addresses were routed at the same time, but they couldn’t be accessed since their DNS was down – the whole network was essentially inaccessible. Facebook’s DNS resolvers across the globe stopped responding as a result of the erroneous update, which had a knock-on impact on Cloudflare.
Because Facebook ceased broadcasting its DNS prefixes through BGP, Cloudflare and other DNS resolvers were unable to connect to them. SERVFAIL replies were generated, as were 184.108.40.206, 220.127.116.11, and other important DNS resolvers. This resulted in a surge of extra DNS traffic since applications would not accept an error as a response and will continue retrying. Human behavior also had a role, with an increasing number of individuals attempting to connect to these services.
DNS activity for alternative platforms has increased | Source: Cloudflare
Active services like Signal and Twitter experienced a significant increase in DNS activity as people began searching for alternatives and methods to communicate what was going on.
Cloudflare detected additional BGP activity from Facebook at 21:00 UTC, peaking at 21:17 UTC. Facebook was trying to correct the erroneous configuration modifications. At approximately 2120 UTC, Facebook’s DNS resolution finally came back up.
DNS availability on Facebook | Source: Cloudflare
It may take some time for their services to completely recover, but as of 21:28 UTC, Facebook seems to be back up and connected to the worldwide internet, with its DNS working again.
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The Facebook, Instagram and WhatsApp outage was caused by a problem with the company’s data center in North Carolina. Facebook has not yet revealed what caused the issue. Reference: facebook outage reason.
Frequently Asked Questions
What caused Facebook and Instagram to go down?
Facebook and Instagram went down due to a DDoS attack. A DDoS attack is when hackers are able to overwhelm the servers of a website or service with so many requests that they cannot handle them, causing it to crash.
What caused Instagram outage?
Instagram was down for a few hours because of an internal server error.
Why did the Facebook outage happen?
Facebook had a massive outage that lasted for about an hour on February 4th, 2019. The cause of the outage was due to a hardware failure in one of their data centers.
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