You often connect to the Internet and often feel late.
In most cases, the contracted line is slow or the line is crowded during the connected time.But what if DNS is slow and the Internet is slow?Changing the settings may increase the speed of the Internet.
What is DNS in the first place?
When communicating with computers through the Internet, we identify the other party using something like an IP address.However, the IP address is just a number, so it is very difficult to remember which website was which IP address.Therefore, by adding the domain name (for example, www.gizmodo.jp) and the IP address that is easy for humans to remember, if you know the domain name, you can communicate with the other computer.Was devised.
We use DNS when accessing websites and web services on PCs and smartphones.When accessing the website with a browser, first contact the DNS server for the domain name included in the URL.When the DNS server tells you the IP address, communicate with a computer with that IP address and download the website data.In this way, you can display the website for the first time.
Of course, if you know the IP address, you do not need DNS processing.But given countless websites, it's hard to remember the IP address by individuals.In this way, DNS supports a comfortable Internet environment, though not usually conscious.
Why change DNS settings?
In the first place, you may not have been conscious of DNS settings.In most cases, the DNS server provided by the ISP (Internet Service Provider) is automatically set, so you don't have to think.However, if you are worried about privacy, speed, security, and reliability when using the Internet, you need to review the DNS settings.
From a privacy perspective, changing the DNS server can keep your access records that are not perfect.For example, DNS providers, such as CloudFlare, have set a record of inquiry to the DNS server every 24 hours to protect user privacy.It also provides services such as blocking access to fishing sites and malicious sites.Of course, ISPs sometimes provide such services.
However, information about which website accesses are tracked in a way other than DNS.Also, if you switch the DNS server from ISP to another provider, it is another matter whether the provider is reliable.If you really want to keep your access records, consider using VPN and encrypted DNS.
In terms of speed and reliability, it can be greatly improved by changing the DNS server.The faster and stable DNS server response, the faster the website accessories and the more stable.However, the response speed and stability of the DNS server does not necessarily improve because there are parts that depend on the contracted ISP and physical distance.You need to check the compatibility with the DNS server with a tre -and error.
In addition, from the viewpoint of setting flexibility, it is only a DNS level, but we do not want to access the website blocked by ISP and the government, or to access adult sites.It is possible to block.If you want to create your favorite access restrictions, you may consider switching to a DNS provider that can be set.
If you are connected to a public wireless LAN, you should be careful about setting the DNS server.It is set to contact a malicious DNS server and may be guided to a fishing site.Be careful when connecting to a public Wi-Fi, such as switching the DNS server to a trusted one to avoid such danger.
DNS provider choice
I've checked the benefits of changing the DNS server, but which DNS provider is better?Here, I would like to introduce four popular DNS providers.
CloudFlare
CloudFlareは新興のDNSプロバイダーで、速くてプライバシーに配慮している点が売りです。DNSサーバーのIPアドレスはとても覚えやすく、1.1.1.1と1.0.0.1(プライマリとセカンダリ)になっています。DNSサーバーのレスポンス速度を計測したテストでも、圧倒的な速度を記録しています。
グーグルのパブリックDNSも覚えやすいIPアドレスで、8.8.8.8と8.8.4.4になっています。CloudFlare同様、スピードとセキュリティが売りで、さらにグーグルならではの信頼感があります。匿名化されたものを保存しておくものの、IPアドレスのログは48時間以内に削除される設定です。
Quad9
The advantage of Quad9 is the speed and the safety using the threat intelligence database provided by partner companies such as IBM.As a Quad9 stance, it is designed to consider the privacy and security of the user, and is designed not to save the user's personal information and not allow other use.The IP address of the DNS server is 9.9.9.9 and 149.112.112.112.
OpenDns
OpenDnsは、フィルタリングと子どもの安全性にフォーカスしているDNSプロバイダーです。また、中小企業向けに有償パッケージも提供しています。DNSプロバイダーの中でも老舗であり、2015年にCisco社に買収されています。無償の家族向けパッケージのDNSサーバーとして、208.67.222.222と208.67.220.220が提供されています。アカウントを作成することで、無償のものを含むその他のパッケージを使うことができます。
How to change the DNS server
Changing the DNS server settings is not so difficult.In the case of a wireless LAN router, the change method varies depending on the model, but you can usually change the DNS server by accessing the router setting screen with a browser.If you change the DNS settings with a wireless LAN router, you do not need to change the settings for each connected device.
For Windows
Select the setting icon from the start menu and open the network and the Internet.Select Change the adapter option, right -click the adapter to be changed, and select the property.After selecting the Internet Protocol version 4 in the list, click the property and set the DNS server IP address from the next DNS server address.
For macOS
Click the network from the system environment settings.Select the connection to be changed and open the DNS tab from the details button.Use the plus button to add a new DNS server settings.
For Android
Changing the DNS server setting takes a little time.First, you must change the IP address of the Android device steadily, but it is necessary to consider the router side settings so that the IP address does not overlap.If the IP address does not overlap, select the network and the Internet from the settings.Tap the Wi-Fi to select the connected network setting icon and select the pencil mark (or press and hold the Wi-Fi name to change the network).You can change the DNS server settings after tapping the detailed options and changing the IP settings steadily (fixed).
For iOS
After selecting Wi-Fi from the settings, tap the connected network.Select DNS configuration, tap manual, and then add the DNS server.
最後に、Wi-Fiではなくキャリアの回線を使っている場合は、DNSサーバーの変更が面倒になります。For iOS、アプリの追加なしに変更することはできません。また、For Androidは、Android 9 Pieである必要があります。iOSではDNS Overrideというアプリを、AndroidではDNS Changerというアプリを使うことで、キャリアの回線でもDNSサーバーの設定を変えることができます。セルラー回線でどうしてもDNSを変えたいということであれば、これらのアプリを検討してみてはいかがでしょうか。