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This is what likely caused Facebook’s outage - and why SA banks should be concerned

Source: Business Insider SA, 04/07/2019


Several global websites such as OkCupid, Buzzfeed and Medium have
also experienced problems due to Cloudflare.
Goldstuck believes Cloudflare is the likely cause as only parts of
the social media platforms were affected, such as posting photos
on Instagram, or sending voice notes on WhatsApp.
“Social media networks make use of different DNS providers, and
the DNS server of Cloudflare for the specific services on the
platforms likely failed,” Goldstuck told Business Insider South
Africa.
A DNS server allows computer and mobile browsers to connect to
website addresses, by rooting the correct information to the
browser.
“This is why, for example, users could not load photos as the DNS
server was unable to send the correct information to the end user
but users were still able to use their feeds.”

Facebook, which owns and operates Instagram and WhatsApp, is yet
to disclose the cause of their network issues.
Goldstuck, with over thirty years of experience in the technology
sector, said it is extremely worrying that an established company
such as Cloudflare has experienced these repeated issues.
While current outages have not affected essential services,
Goldstuck believes the next outage may well hit emergency and
financial services hosted online.
He said South African financial services such as banks are
especially prone to be hit by such an outage.
“We don’t have much readiness in South Africa’s banking industry.
To avoid a DNS outage heavily affecting a bank’s service it should
have multiple points of entry outside of just online. We are just
not seeing that with South African banks.”
New South African banks such as TymeBank and Discovery Bank are
almost exclusively hosted online.
Goldstuck does not believe users’ personal data is at risk as a
DNS outage does not give access to an individual’s information.
He, however, said that cyber warfare teams in countries like North
Korea would be prompted by the outages to treat DNS as a point of
vulnerability that they could attack to bring digital government
and financial services to a halt.

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