Since approximately 22:00 on 05/06/24 our core network has been exhibiting severe packet loss. Investigations are ongoing, but we have no ETF yet. We apologise for the poor performance.

Update:-

We believe the problem last night was caused by a flood of TCP SYN packets. They don’t use much bandwidth, but do use a lot of CPU resource, leading to the packet loss. We are working with the FireBrick development team to see what improvements can be made to mitigate the effect should it occur again.