With apologies for not posting earlier about this, but this morning the DOS attack expanded to all of our nameservers, however we have managed to maintain DNS availability.
So far every single customer who has reported a problem with DNS availability over the course of the DOS attack has, upon inspection of their domain’s nameserver delegation, only been delegated to a subset of the full nameserver cluster.
In many cases users using third-party registrars were still only delegated to 2 nameservers. This misses much of the benefit having an expanded nameserver cluster exposes your domain to elevated risk of DNS-outage during events such as this.
So please, if you’re using an external registrar, check your delegation and make sure your domains are delegated to all 6 of our nameservers: