The NCA fingered the collar of the 29 year old Brit at one of London’s airports, the coppers said in a statement.
The attack on Deutsche Telekom, Germany’s largest telecom company, took place in late November. Internet outages hit as many as 900,000 of its users, or about 4.5 percent of its fixed line customers.
German security experts thought the internet outages that have hit hundreds of thousands of Deutsche Telekom customers in Germany were part of a worldwide attempt to hijack routing devices.
Dirk Backofen, a senior Deutsche Telekom security executive said the attack was not an attack against Deutsche Telekom. “It was a global attack against all kinds of devices. How many other operators were affected, we don’t know,” he said.
Deutsche Telekom said the problems seemed to be connected to an attempt to make customers’ routers part of the Mirai botnet.