Do you use Ubiquiti gear for your home network?
Ubiquiti has 2 lines of products, EdgeRouters, and Unifi. EdgeRouters are for uber-nerds (like us). Unifi is a GUI based solution that is used by pro-sumers who want more than a basic router but aren’t comfortable typing text commands in ssh windows. If you don’t know what I just wrote, you are a Unifi person, not an EdgeRouter person. Ubiquiti has some “discovery” features which result in “noise” being generated out the WAN port of their devices. This discovery traffic/server has been hijacked and used to deny service to other subscribers.
If you have an EdgeRouter device, disable ubnt-discovery and ubnt-discovery-server. There is no reason for you to have these services enabled; they are for WAN facing discovery, which is useless for you. The server is used in weak DDOS amplification attacks. We have watched it happen on the network.
If you are using a modern Ubiquiti Dream Machine (UDM base or UDM pro), upgrade to 1.10.0. It is safe, I promise. I have upgraded 4 UDMs with no trouble and the general read from the forums is we finally have a stable platform. If you are running a version lower than 1.9.3 you are a “noise maker/DDOS participant” on the Net253 network and I will be reaching out to you to urge you to upgrade.
Thanks!
Your internet janitor and bottle washer.