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Nick Peng
2019-03-13 22:43:59 +08:00
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ReadMe.md
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![SmartDNS](doc/smartdns-banner.png) ![SmartDNS](doc/smartdns-banner.png)
SmartDNS is a local DNS server. SmartDNS accepts DNS query requests from local clients, obtains DNS query results from multiple upstream DNS servers, and returns the fastest access results to clients. SmartDNS is a local DNS server. SmartDNS accepts DNS query requests from local clients, obtains DNS query results from multiple upstream DNS servers, and returns the fastest access results to clients.
Avoiding DNS pollution and improving network access speed, supports high-performance ad filtering. Avoiding DNS pollution and improving network access speed, supports high-performance ad filtering.
Unlike dnsmasq's all-servers, smartdns returns the fastest access resolution. Unlike dnsmasq's all-servers, smartdns returns the fastest access resolution. （[read more](#faq)）
Support Raspberry Pi, openwrt, ASUS router, Windows and other devices. Support Raspberry Pi, openwrt, ASUS router, Windows and other devices.
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Support standard Linux system (Raspberry Pi), openwrt system various firmware, ASUS router native firmware. Support Windows 10 WSL (Windows Subsystem for Linux). Support standard Linux system (Raspberry Pi), openwrt system various firmware, ASUS router native firmware. Support Windows 10 WSL (Windows Subsystem for Linux).
7. **Support IPV4, IPV6 dual stack** 7. **Support IPV4, IPV6 dual stack**
Support IPV4, IPV6 network, support query A, AAAA record, dual-stack IP selection. Support IPV4, IPV6 network, support query A, AAAA record, dual-stack IP selection, and disale IPV6 AAAA record.
8. **High performance, low resource consumption** 8. **High performance, low resource consumption**
Multi-threaded asynchronous IO mode, cache cache query results. Multi-threaded asynchronous IO mode, cache cache query results.
@@ -597,8 +597,8 @@ Note: Merlin firmware is derived from ASUS firmware and can theoretically be use
Nameserver /.office/office Nameserver /.office/office
``` ```
1. How to use the dual stack IP optimization feature 1. How to use the IPV4, IPV6 dual stack IP optimization feature
At present, IPV6 network is not as fast as IPV4 in some cases. In order to get a better experience in the dual-stack network, SmartDNS provides a dual-stack IP optimization mechanism, the same domain name, and the speed of IPV4. Far faster than IPV6, then SmartDNS will block the resolution of IPV6, let the PC use IPV4, the feature is enabled by `dualstack-ip-selection yes`, `dualstack-ip-selection-threshold [time]` is for threshold. At present, IPV6 network is not as fast as IPV4 in some cases. In order to get a better experience in the dual-stack network, SmartDNS provides a dual-stack IP optimization mechanism, the same domain name, and the speed of IPV4. Far faster than IPV6, then SmartDNS will block the resolution of IPV6, let the PC use IPV4, the feature is enabled by `dualstack-ip-selection yes`, `dualstack-ip-selection-threshold [time]` is for threshold. if you want to disable IPV6 AAAA record complete, please try `force-AAAA-SOA yes`.
1. How to improve cache performace 1. How to improve cache performace
Smartdns provides a domain name caching mechanism to cache the queried domain name, and the caching time is in accordance with the DNS TTL specification. To increase the cache hit rate, the following configuration can be taken: Smartdns provides a domain name caching mechanism to cache the queried domain name, and the caching time is in accordance with the DNS TTL specification. To increase the cache hit rate, the following configuration can be taken:

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ReadMe_zh-CN.md
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![SmartDNS](doc/smartdns-banner.png) ![SmartDNS](doc/smartdns-banner.png)
SmartDNS是一个运行在本地的DNS服务器，SmartDNS接受本地客户端的DNS查询请求，从多个上游DNS服务器获取DNS查询结果，并将访问速度最快的结果返回给客户端，避免DNS污染，提高网络访问速度。 SmartDNS是一个运行在本地的DNS服务器，SmartDNS接受本地客户端的DNS查询请求，从多个上游DNS服务器获取DNS查询结果，并将访问速度最快的结果返回给客户端，避免DNS污染，提高网络访问速度。
同时支持指定特定域名IP地址，并高性匹配，达到过滤广告的效果。 同时支持指定特定域名IP地址，并高性匹配，达到过滤广告的效果。
与dnsmasq的all-servers不同，smartdns返回的是访问速度最快的解析结果。 与dnsmasq的all-servers不同，smartdns返回的是访问速度最快的解析结果。 (详细差异请看[FAQ](#faq))
支持树莓派，openwrt，华硕路由器，windows等设备。 支持树莓派，openwrt，华硕路由器，windows等设备。
@@ -109,7 +109,7 @@ rtt min/avg/max/mdev = 5.954/6.133/6.313/0.195 ms
支持标准Linux系统（树莓派），openwrt系统各种固件，华硕路由器原生固件。以及支持Windows 10 WSL (Windows Subsystem for Linux)。 支持标准Linux系统（树莓派），openwrt系统各种固件，华硕路由器原生固件。以及支持Windows 10 WSL (Windows Subsystem for Linux)。
1. **支持IPV4, IPV6双栈** 1. **支持IPV4, IPV6双栈**
支持IPV4，IPV6网络，支持查询A, AAAA记录，支持双栈IP速度优化。 支持IPV4，IPV6网络，支持查询A, AAAA记录，支持双栈IP速度优化，并支持完全禁用IPV6 AAAA解析。
1. **高性能，占用资源少** 1. **高性能，占用资源少**
多线程异步IO模式，cache缓存查询结果。 多线程异步IO模式，cache缓存查询结果。
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## FAQ ## FAQ
1. SmartDNS和DNSMASQ有什么区别 1. SmartDNS和DNSMASQ有什么区别
SMARTDNS在设计上并不是替换DNSMASQ的，MARTDNS主要功能集中在DNS解析增强上，增强部分有 SMARTDNS在设计上并不是替换DNSMASQ的，SMARTDNS主要功能集中在DNS解析增强上，增强部分有：
* 多上游服务器并发请求，对结果进行测速后，返回最佳结果； * 多上游服务器并发请求，对结果进行测速后，返回最佳结果；
* address，ipset域名匹配采用高效算法，查询匹配更加快速高效，路由器设备依然高效。 * address，ipset域名匹配采用高效算法，查询匹配更加快速高效，路由器设备依然高效。
* 域名匹配支持忽略特定域名，可单独匹配IPv4， IPV6，支持多样化定制。 * 域名匹配支持忽略特定域名，可单独匹配IPv4， IPV6，支持多样化定制。
@@ -603,8 +603,8 @@ rtt min/avg/max/mdev = 5.954/6.133/6.313/0.195 ms
通过上述配置即可实现DNS解析分流 通过上述配置即可实现DNS解析分流
1. 双栈IP优选功能如何使用 1. IPV4, IPV6双栈IP优选功能如何使用
目前IPV6已经开始普及，但IPV6网络在速度上，某些情况下还不如IPV4，为在双栈网络下获得较好的体验，smartdns提供来双栈IP优选机制，同一个域名，若IPV4的速度远快与IPV6，那么smartdns就会阻止IPV6的解析，让PC使用IPV4访问，具体配置文件通过`dualstack-ip-selection yes`启用此功能，通过`dualstack-ip-selection-threshold [time]`来修改阈值。 目前IPV6已经开始普及，但IPV6网络在速度上，某些情况下还不如IPV4，为在双栈网络下获得较好的体验，smartdns提供来双栈IP优选机制，同一个域名，若IPV4的速度远快与IPV6，那么smartdns就会阻止IPV6的解析，让PC使用IPV4访问，具体配置文件通过`dualstack-ip-selection yes`启用此功能，通过`dualstack-ip-selection-threshold [time]`来修改阈值。如果要完全禁止IPV6 AAAA记录解析，可设置`force-AAAA-SOA yes`。
1. 如何提高cache效率，加快访问速度 1. 如何提高cache效率，加快访问速度
smartdns提供了域名缓存机制，对查询的域名，进行缓存，缓存时间符合DNS TTL规范。为提高缓存命中率，可采用如下措施： smartdns提供了域名缓存机制，对查询的域名，进行缓存，缓存时间符合DNS TTL规范。为提高缓存命中率，可采用如下措施：