Advisory - Imperva CDN Connectivity - 29/04


Issue has now been resolved.
If you are unable to access any sites behind Imperva DNS, please do let our team know.

Problem Identified

We are continuing to work with network and security teams across ANZ and Imperva to resolve this issue.
Our team are assisting these teams as much as possible with their resolutions, and expect to see resolution soon.
We apologise for the inconvenience caused.


Some customers using our DNS servers may be experiencing issues when trying to connect to websites behind Imperva’s Content Delivery Network (CDN), which includes some banking websites.
We have reached out to Imperva to investigate and remedy this and are awaiting resolution. Once we have received feedback this has been completed, we will update this advisory.
In the meantime, if access is urgently required, changing your DNS servers to alternate providers, such as Cloudflare ( or Quad9 ( does appear to resolve this issue.

8 Affected Services: