I-Blocklist Denial Of Service Attack The recent downtime was caused by a sizable denial of service attack that began February 28th at 12:00am GMT. I-Blocklist has taken steps to mitigate the attack and service should now be restored. There is no risk to you or your data however slow and/or intermittent service is possible in the short term. I take this attack as testimony of the importance and effectiveness of the service I-Blocklist provides. Thank you for your patience and continued support.