No personal data is compromised in such attacks, which affect the infrastructure of websites and computer servers. "We would like to reassure customers that no personal data or devices have been compromised," said a spokesman for the Post Office. "We have identified the source of the problem and implemented a resolution which is currently being rolled out to all customers. "For those customers who are still having problems, we are advising them to reboot their router." Talk Talk said it had added emergency security measures to help protect its customers and that it was working with other internet service providers to "review the potential impacts" of the malicious software. Kcom, which also uses the Zyxel AMG302, said: "The vast majority of our customers are now able to connect to and use their broadband service as usual. "Our core network was not affected at any time and we have put in place measures to block future attacks from impacting our customers' routers and their ability to access the internet."
TalkTalk and Post Office routers were taken down by a distributed denial of service attack this week, which targeted Hull’s internet provider Kcom and Germany’s Deutsche Telekom. The attack left over one million customers without internet connection in Germany and the UK, with many customers complaining that TalkTalk and the Post Office had not sufficiently helped them with the issue. The agents behind the attack have not been identified, but the attack used a similar approach to the one used against the Dyn domain name server, which took Twitter, eBay and Reddit offline for a period in October by exploiting vulnerabilities in internet-connected devices.