Dyn DDoS attack link under disadvantages of DNS redirects to oracle

[brendonmiranda]

The Dyn DDoS attack link under disadvantages of DNS (http://dyn.com/blog/dyn-analysis-summary-of-friday-october-21-attack/) redirects to Oracle website instead (https://www.oracle.com/cloud/networking/dns/).

I'd say that ideally a new source could replace the above. For example a wikipedia explanation of the occurred: https://en.wikipedia.org/wiki/DDoS_attacks_on_Dyn.

Lmk what you guys think. I'd love to submit a PR to fix that once a new source is agreed and the issue is approved.
Thanks.

[brendonmiranda]

Jfyi I can see that a PR has already been opened in relation to this issue. #572

[mohahhdr]

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