Malicious hackers are increasingly using compromised, consumer-grade routers to amplify the power of their DDoS attacks. Ordinary users are often unaware that their network devices can be compromised, and even less likely to recognize any actual compromise.
Adding to the problem is the slow pace – or utter lack – of security updates from device manufacturers. Even when updates are made available, users are unlikely to know about them, and in most cases don’t possess the skill required to install them.
All of this makes routers attractive targets. Ars Technica reports on one DDoS-for-hire service that uses a vast network of compromised routers.
There’s a related post on Brian Krebs’ blog. Scroll down to ‘ROUTER SECURITY 101’ for some useful recommendations. At the very least, log in to your router’s admin interface and check for any available security updates.