Public DNS Cloudflare or Google Which is the fastest in the world ...?

SC2 2018-04-06

2021-08-31

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Cloudflare DNS

Cloudflare (1.1.1.1 | 1.0.0.1), the world's fastest public DNS service, has launched.

It is estimated that the number of users using Google Public DNS will be enormous, but the number of users is thought to be small since Cloudflare DNS has just started.

If you use it now.
... ('oh')

Provider DNS fastest theory

Considering the network route from PC to Web server, I think that the provider's DNS response is the fastest.

However,

The story changes if the provider DNS refers to Cloudflare or Google Public DNS.

Restless talk

I tried Cloudflare DNS and Google Public DNS, so I will share the setting procedure of each DNS.

If you hear which is the fastest ...

···Is the same.

If you measure it, you may get a difference in milliseconds, but it is the same on the experience.

DNS information

Setting information
	Google	Cloudflare
DNS1 /IPv4	8.8.8.8	1.1.1.1
DNS2 /IPv4	8.8.4.4	1.0.0.1
DNS1 /IPv6	2001: 4860: 4860 :: 8888	2606: 4700: 4700 :: 1111
DNS2 /IPv6	2001: 4860: 4860 :: 8844	2606: 4700: 4700 :: 1001

Cloudflare (Google Public DNS) setup instructions

Here are the steps to set up Cloudflare DNS for your wireless network connection.

For Google Public DNS, use the value of Google Public DNS.

Our PC had priority on TCP /IPv6 DNS settings, so let's change both TCP /IPv4 and TCP /IPv6 DNS settings.

When setting Cloudflare DNS only for TCP /IPv4, the setting that gives priority to TCP /IPv4 is required.

[Setting flow]

View wireless network connection properties
Set Cloudflare DNS values for TCP /IPv4
Set Cloudflare DNS values for TCP /IPv6

Wireless network connection properties

Win10> Start menu Right-click> Settings> Network and Internet> Change adapter options> Double-click the wireless network connection> Click Properties

TCP/IPv4

Internet Protocol Version 4 (TCP /IPv4)> Properties

Only the DNS is changed while the IP address is DHCP.

TCP/IPv6

Internet Protocol Version 6 (TCP /IPv6)> Properties

Only the DNS is changed while the IP address is DHCP.
In my environment, IPv6 DNS settings were used, so it is recommended to set IPv6.

DNS check

Let's check if it works properly after changing DNS.

[procedure]

Start Windows PowerShell (or command prompt)
Run nslookup
Default server is displayed
End of procedure

If Google (or Cloudflare) DNS is displayed in step 3, you are successful.

Google Public DNS
>_	Windows PowerShell	ー □ ×
PS C:\> nslookup Default server: google-public-dns-a.google.com Address: 2001:4860:4860::8888

Cloudflare
>_	Windows PowerShell	ー □ ×
PS C:\> nslookup Default server: 1dot1dot1dot1.cloudflare-dns.com Address: 2606:4700:4700::1111

Afterword

How do I give priority to IPv4 DNS settings?

My PC used TCP /IPv6 DNS settings for name resolution.

If you want to give priority to TCP /IPv4 DNS settings, open the "TCP /IP Advanced Settings" on the DNS setting screen, uncheck Automatic Metrics, and specify the interface metric value.

Smaller values take precedence.

[procedure]