Write-up published
Read our write-up of this incident at https://blakemarkproductions.com/wp-content/uploads/2025/11/2025-11-26-dns-issues.pdf
Resolved
Traffic levels have normalised and both nameservers are now stable.
A full post-incident report will be published.
Monitoring
Filtering has been deployed to suppress abnormal traffic patterns.
NS2 performance is improving and we are monitoring closely.
Identified
To stabilise DNS services, we have taken NS2 offline to increase compute capacity.
DNS resolution remains available via NS1.
Identified
The elevated request load on NS2 is increasing and causing intermittent DNS failures.
We are exploring both scaling options and traffic filtering to stabilise the nameserver.
NS1 continues to operate normally.
Investigating
We have confirmed that NS2 is experiencing degraded performance, resulting in slow or failed DNS responses for domains using that nameserver.
All other services remain operational.
We are investigating the cause of the degraded performance and assessing next steps.
Investigating
We are continuing to investigate the root cause.
Early signs suggest the issue is isolated to NS2, while NS1 remains fully operational.
We are reviewing traffic patterns and system performance on NS2.
Investigating
Our monitoring has detected intermittent DNS resolution failures affecting a number of domains.
This appears to be affecting some queries made via our secondary nameserver (NS2).
We are investigating and will update within 30 minutes.