Deutsche Telekom has said it will be reviewing its business relationship with the supplier of its Speedport routers, Arcadyan, following the outage. It offered firmware updates on Monday to three models, all of which are made by Arcadyan Technology. Stephen Gates, chief research intelligence analyst at NSFOCUS said: "Most people don't know that all broadband service providers have ensured they have backdoors into 'their' customer-edge devices; which can be cable modems, DSL modems, routers, etc. The reason for this is simple. It ensures people don't get services for free, while at the same time allowing the provider access into the remote devices for troubleshooting, updating, billing, etc. This helps reduce associated costs. In this case, it appears that hackers have figured out a way to capitalise on the backdoor, and cause a noteworthy denial of service outage." The fact that it appears to be Deutsche Telekom's lack of security awareness in attempting to leave a 'back door' open will enrage its users.