Upstream DNS provider limits

[pwjw]

Not strictly nxfilter product related, but who are people using for their upstream DNS provider?

Does anyone have any experience of whether public DNS providers (Google/Cloudflare/OpenDNS etc) have limits on queries coming from the same IP(s)?

For example, if we have 100m requests a day that come to nxfilter and thus proxied to an upstream DNS provider for the initial non-cached query, will they have a problem with this?

If blocking/limiting occurs it will of course have a knock on effect to nxfilter and our users who query it.

Thanks

[support200]

NxFilter and NxCloud has its own cache. If there are 1000 queries for google.com in a minute and if it's in within its TTL then NxFilter makes only one query to its upstream server. I don't think it looks too big to these upstream servers.

And you also can install your own recursive DNS servers and use them as your upstream servers. You even can install them in the same system as NxCloud. https://tutorial.nxfilter.org/h-nxfi...-server.php#rx