DNS on an Orbi 850 translates names into addresses, and when pages fail to load while the connection looks fine, or when one site is slow or blocked, the DNS setting is a likely culprit, and the Orbi lets you choose which servers it uses. Sign in at orbilogin.com or the Orbi app and open Internet, where the Domain Name Server setting is either Get automatically from ISP or Use these DNS servers. By default the router takes the provider's servers, which are sometimes slow or unreliable.
The checks in more detail
To test, switch to a public resolver, entering a primary and a secondary address from a service you trust, apply and restart the router. If sites load faster or start working, the provider's DNS was at fault. Some checks help to confirm. From a computer, run a lookup for a site and see whether it takes long or fails, and test the same lookup against a public server. If an address works by number but not by name, DNS is the cause. A device can have its own DNS setting, set manually or by a VPN, that overrides the router,
and a browser may use its own secure DNS, so a site that is blocked on one device and not another is a hint. Parental controls and filters that use DNS, including the router's, can block sites by category, and a site that is blocked for no reason may be caught by them. If you use the Orbi's DNS-based filtering or a service such as OpenDNS, check that the account and the settings are correct. Clear the device's DNS cache, which on Windows is done in a command prompt and on a phone by toggling Airplane mode.
After a router change, flush the cache and restart. Avoid entering two servers from different providers with different filtering, since the device may use either at random. Make sure that the router's date is correct, because secure DNS needs it. If DNS errors continue on every server, a problem with the connection itself is more likely, so power cycle the modem and router in order. Keep the default if everything works, since a fast provider's DNS is fine. Contact Netgear if the setting does not save, with the serial number.
Differential
Likely causes of “NETGEAR Orbi 850 Series mesh cannot open websites because DNS fails”, and how to tell them apart
- 1
A slow or failing provider DNS
What separates it Pages fail or load slowly
How to confirm Use a public DNS resolver in Internet settings
- 2
A device-level DNS override
What separates it One device behaves differently
How to confirm Set the device to automatic
- 3
A filter blocking a category
What separates it A site is blocked for no reason
How to confirm Check the router's filters
- 4
A browser's secure DNS
What separates it A site is blocked on one browser only
How to confirm Review the browser's DNS setting
- 5
A cached bad lookup
What separates it The fault persists after a fix
How to confirm Clear the cache and restart
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which sites fail
- The DNS setting in Internet
- Whether the problem is on one device
- Whether a filter is on
Try in this order
0 of 6 completedOpen Internet settings
ReversibleIn orbilogin.com or the app.
Switch to a public resolver
ReversiblePrimary and secondary.
Restart the router
ReversibleAnd devices.
Clear the device cache
ReversibleOr toggle Airplane mode.
Check filters and browsers
ReversibleFor overrides.
Power cycle the modem
ReversibleIf all servers fail.
Model-specific
What is true of this model and not of its siblings
- Default
- The router uses the provider's DNS.
- Override
- Devices and browsers can use their own.
Stop boundary
When this stops being a self-service repair
- !If DNS fails on every server, check the connection and the modem
- !If the setting does not save, contact Netgear with the serial number
- !Keep a note of the previous setting
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why would I change DNS?+
The provider's may be slow or unreliable.
Where is it set?+
Under Internet in the Orbi settings.
Can a device override it?+
Yes.
Can DNS block sites?+
Filters can.