What many have suspected has now been confirmed – the root cause of the many netsplits on the freenode IRC network during the last days have been caused by ongoing DDoS attacks on their sponsors.
Freenode staffer JonathanD writes in their blogpost that they are experiencing a “heavy DDoS against several locations at which some of our servers are hosted. The attack is ongoing and cause a lot of disruption, both to users of the network and unfortunately to projects/companies/individuals whos infrastructure is hosted at the same locations as us” but also writes that they are “working hard to try curb the attacks as best they can.”
He also writes that they will keep their staffblog updated on the issues and recommends that “users of the network will also be able to receive (infrequent) status updates via global notice and slightly more frequent updates via wallops for those who have chosen to go +w (/umode +w or /mode yournick +w) will enable wallops in your irc client should you wish to see these.”
In closing he apologizes for “the inconvenience this no doubt causes for you and your project(s) and we would like to thank you all (in particular, our very generous and dedicated sponsors) for the patience and support while the issues are still ongoing.”