DNS traffic rise causes StarHub broadband service failure

Friday 21 April 2017 | 10:25 CET | News

The Infocomm Media Development Authority (IMDA) and the Cyber Security Agency of Singapore (CSA) have completed the investigations into StarHub’s home broadband network disruptions that occurred on 22 and 24 October 2016. The investigations revealed that the disruptions were caused by a surge in legitimate Domain Name System (DNS) traffic and did not point towards a Distributed Denial of Service (DDoS) attack.

The two incidents affected some StarHub home fibre broadband customers in several parts of Singapore and lasted 130 and 55 minutes respectively. During the incidents, affected customers encountered intermittent difficulties accessing the internet as StarHub’s DNS servers could not fully handle the high volume web requests.

In the course of investigations, IMDA and CSA have also identified areas of improvement in StarHub’s home broadband network infrastructure. Since the incidents, IMDA says StarHub has taken the necessary steps to mitigate future risks, including increasing its home broadband DNS server capacity and enhancing traffic monitoring.

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