We deeply regret the current problems with the DOAJ site. After much investigation and active measures, we can state that the DOAJ is effectively under attack from an unknown third party.
We have deployed a number of counter-measures to halt this attack, but with limited success, and are therefore forced to take even more extreme measures to attempt to mitigate this. We hope that this will work but we cannot predict the outcome at this stage.
The DOAJ team would like to apologise for the intermittent service and to let you know we are doing our best to go back to normal operations.