SmartDNS

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. supports secure DNS protocols like DoT (DNS over TLS), DoH (DNS over HTTPS), better protect privacy,
Avoiding DNS pollution and improving network access speed, supports high-performance ad filtering.
Unlike dnsmasq's all-servers, smartdns returns the fastest access resolution. （read more）

Support Raspberry Pi, openwrt, ASUS router, Windows and other devices.

Table Of Content

SmartDNS

Software Show

Ali DNS
Use Ali DNS to query Baidu's IP and test the results.

pi@raspberrypi:~/code/smartdns_build $ nslookup www.baidu.com 223.5.5.5
Server:         223.5.5.5
Address:        223.5.5.5#53

Non-authoritative answer:
www.baidu.com   canonical name = www.a.shifen.com.
Name:   www.a.shifen.com
Address: 180.97.33.108
Name:   www.a.shifen.com
Address: 180.97.33.107

pi@raspberrypi:~/code/smartdns_build $ ping 180.97.33.107 -c 2
PING 180.97.33.107 (180.97.33.107) 56(84) bytes of data.
64 bytes from 180.97.33.107: icmp_seq=1 ttl=55 time=24.3 ms
64 bytes from 180.97.33.107: icmp_seq=2 ttl=55 time=24.2 ms

--- 180.97.33.107 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 24.275/24.327/24.380/0.164 ms
pi@raspberrypi:~/code/smartdns_build $ ping 180.97.33.108 -c 2
PING 180.97.33.108 (180.97.33.108) 56(84) bytes of data.
64 bytes from 180.97.33.108: icmp_seq=1 ttl=55 time=31.1 ms
64 bytes from 180.97.33.108: icmp_seq=2 ttl=55 time=31.0 ms

--- 180.97.33.108 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 31.014/31.094/31.175/0.193 ms

smartdns
Use SmartDNS to query Baidu IP and test the results.

pi@raspberrypi:~/code/smartdns_build $ nslookup www.baidu.com
Server:         192.168.1.1
Address:        192.168.1.1#53

Non-authoritative answer:
www.baidu.com   canonical name = www.a.shifen.com.
Name:   www.a.shifen.com
Address: 14.215.177.39

pi@raspberrypi:~/code/smartdns_build $ ping 14.215.177.39 -c 2
PING 14.215.177.39 (14.215.177.39) 56(84) bytes of data.
64 bytes from 14.215.177.39: icmp_seq=1 ttl=56 time=6.31 ms
64 bytes from 14.215.177.39: icmp_seq=2 ttl=56 time=5.95 ms

--- 14.215.177.39 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 5.954/6.133/6.313/0.195 ms

From the comparison, smartdns found the fastest IP address to visit www.baidu.com, so accessing Baidu's DNS is 5 times faster than Ali DNS.

Features

Multiple upstream DNS servers
Support configuring multiple upstream DNS servers and query at the same time.the query will not be affected, Even if there is a DNS server exception.
Return the fastest IP address
Supports finding the fastest access IP address from the IP address list of the domain name and returning it to the client to avoid DNS pollution and improve network access speed.
Support for multiple query protocols
Support UDP, TCP, DOT(DNS over TLS), DOH(DNS over HTTPS) queries, and non-53 port queries, effectively avoiding DNS pollution and protect privacy, and support query DNS over socks5, http proxy.
Domain IP address specification
Support configuring IP address of specific domain to achieve the effect of advertising filtering, and avoid malicious websites.
Domain name high performance rule filtering
Support domain name suffix matching mode, simplify filtering configuration, filter 200,000 recording and take time <1ms.
Linux/Windows multi-platform support
Support standard Linux system (Raspberry Pi), openwrt system various firmware, ASUS router native firmware. Support Windows 10 WSL (Windows Subsystem for Linux).
Support IPV4, IPV6 dual stack
Support IPV4, IPV6 network, support query A, AAAA record, dual-stack IP selection, and filter IPV6 AAAA record.
DNS64
Support DNS64 translation.
High performance, low resource consumption
Multi-threaded asynchronous IO mode, cache cache query results.
DNS domain forwarding
Support DNS forwarding, ipset and nftables. Support setting the domain result to ipset and nftset set when speed check fails.

Architecture

SmartDNS receives DNS query requests from local network devices, such as PCs and mobile phone query requests.
SmartDNS sends query requests to multiple upstream DNS servers, using standard UDP queries, non-standard port UDP queries, and TCP queries.
The upstream DNS server returns a list of Server IP addresses corresponding to the domain name. SmartDNS detects the fastest Server IP with local network access.
Return the fastest accessed Server IP to the local client.

Usage

Use official installation source

smartdns can already be installed using system package management tools.

Download the package

Download the matching version of the SmartDNS installation package. The corresponding installation package is as follows.

system	package	Description
Standard Linux system (Raspberry Pi)	smartdns.xxxxxxxx.arm-debian-all.deb	Support Raspberry Pi Raspbian stretch, Debian 9 system.
Standard Linux system (Armbian arm64)	smartdns.xxxxxxxx.aarch64-debian-all.deb	Support Armbian debian stretch, Debian 9 system.
Standard Linux system (x86_64)	smartdns.xxxxxxxx.x86_64-linux-all.tar.gz	Support for x86_64 Linux systems.
Windows 10 WSL (ubuntu)	smartdns.xxxxxxxx.x86_64-linux-all.tar.gz	Windows 10 WSL ubuntu.
Standard Linux system (x86)	smartdns.xxxxxxxx.x86-linux-all.tar.gz	Support for x86_64 systems.
optware	smartdns.xxxxxxxx.mips-optware-all.ipk	Support the MIPS big-endian architecture for optware。
optware	smartdns.xxxxxxxx.mipsel-optware-all.ipk	Support the MIPS little-endian architecture for optware。
optware	smartdns.xxxxxxxx.arm-optware-all.ipk	Support the arm architecture for optware。
openwrt	smartdns.xxxxxxxx.mips-openwrt-all.ipk	Support the MIPS big-endian architecture for openwrt。
openwrt	smartdns.xxxxxxxx.mipsel-openwrt-all.ipk	Support the MIPS little-endian architecture for openwrt。
openwrt	smartdns.xxxxxxxx.arm-openwrt-all.ipk	Support the arm architecture for openwrt。
openwrt LUCI	luci-app-smartdns.xxxxxxxxx.all.ipk	Openwrt management interface.
openwrt LUCI	luci-app-smartdns.xxxxxxxxx.all-luci-compat-all	Compat Openwrt management interface for early openwrt.

The released packages are statically compiled. If you need a small size package, please compile it yourself or obtain it from the openwrt / entware repository.
Please download from the Release page: Download here
```
https://github.com/pymumu/smartdns/releases
```
For MacOS, Windows, you can try rust version of smartdns: SmartDNS-rs
For the installation procedure, please refer to the following sections.

Standard Linux system installation/Raspberry Pi, X86_64 system

Installation

Download the installation package like smartdns.xxxxxxxx.arm-debian-all.deb and upload it to the Linux system. Run the following command to install
```
dpkg -i smartdns.xxxxxxxx.arm-debian-all.deb
```
For X86-64 system, download the installation package like smartdns.xxxxxxxx.x86_64-linux-all.tar.gz and upload it to the Linux system. Run the following command to install
```
tar zxf smartdns.xxxxxxxx.x86_64-linux-all.tar.gz
cd smartdns
chmod +x ./install
./install -i
```
For Ubuntu system:
- systemd-resolved occupies TCP53 and UDP53 ports. You need to manually resolve the port occupancy problem or modify the SmartDNS listening port
- Log files in /var/log/smartdns/smartdns.log
Configuration

After the installation is complete, you can configure the upstream server to smartdns. Refer to the Configuration Parameters for specific configuration parameters.
In general, you only need to add server [IP]:port, server-tcp [IP]:port configuration items.
Configure as many upstream DNS servers as possible, including servers at home and abroad. Please refer to the Configuration Parameters section for configuration parameters.
```
vi /etc/smartdns/smartdns.conf
```
smartdns.conf example:
```
# set listen port
bind []:53 
# set upstream servers
server 1.1.1.1
server-tls 8.8.8.8
# set domain rules
address /example.com/1.2.3.4
domain-rule /example.com/ -address 1.2.3.4
```

Start Service

systemctl enable smartdns
systemctl start smartdns

Forwarding DNS request to SmartDNS

Modify the DNS server of the local router and configure the DNS server as SmartDNS.
- Log in to the router on the local network and configure the Raspberry Pi to assign a static IP address.
- Modify the WAN port or DHCP DNS to the Raspberry Pi IP address. Note: I. Each router configuration method is different. Please search Baidu for related configuration methods. II. some routers may not support configuring custom DNS server. in this case, please modify the PC's, mobile phone's DNS server to the ip of Raspberry Pi.
Check if the service is configured successfully

Query domain name with nslookup -querytype=ptr smartdns
Check if the name item in the command result is displayed as smartdns or hostname, such as smartdns
```
pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
Server:         192.168.1.1
Address:        192.168.1.1#53

Non-authoritative answer:
smartdns         name = smartdns.
```

openwrt

Installation

Upload the software to the /root directory of the router with winscp or other tool, and execute the following command to install it.
```
opkg install smartdns.xxxxxxxx.xxxx.ipk
opkg install luci-app-smartdns.xxxxxxxx.xxxx.all.ipk
```
- Note: For versions before openwrt 19.07, please install luci-app-smartdns.xxxxxxxxx.all-luci-compat-all package.
Configuration

Log in to the openwrt management page and open Services->SmartDNS to configure SmartDNS.
- Add upstream DNS server configuration to Upstream Servers. It is recommended to configure multiple DNS servers at home and abroad.
- Specify the IP address of a specific domain name in Domain Address, which can be used for ad blocking.
Start Service

There are two ways to use the SmartDNS service, one is directly as the primary DNS service, the other is as the upstream of dnsmasq.
By default, SmartDNS uses the first method. You can choose according to your needs in the following two ways.

Method 1: SmartDNS as primary DNS Server
- Enable SmartDNS as primary DNS Server
  
  Log in to the router, click on Services->SmartDNS->port, input port 53, smartdns will run as primary DNS Server.
- Check if the service is configured successfully
  
  Query domain name with nslookup -querytype=ptr smartdns See if the name item in the command result is displayed as smartdns or hostname, such as smartdns
```
pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
Server:         192.168.1.1
Address:        192.168.1.1#53

Non-authoritative answer:
smartdns         name = smartdns.
```
Start Service

Check the `Enable' in the configuration page to start SmartDNS server.
Note
- When the port of smartdns is 53, it will automatically take over dnsmasq as the primary dns. When configuring other ports, dnsmasq is re-enabled as primary dns.
- If an exception occurs during this process, you can use the following command to restore dnsmasq as the primary DNS
```
uci delete dhcp.@dnsmasq[0].port
uci commit dhcp
/etc/init.d/dnsmasq restart
```

ASUS router native firmware / Merlin firmware

Note: Merlin firmware is derived from ASUS firmware and can theoretically be used directly with the ASUS package. However, it is currently unverified. If you have any questions, please submit an issue.

Prepare

When using this software, you need to confirm whether the router supports U disk and prepare a USB disk.
Enable SSH login

Log in to the management interface, click System Management-> Click System Settings and configure Enable SSH to Lan Only.
The SSH login username and password are the same as the management interface.
Install Download Master

In the management interface, click USB related application-> click Download Master to download.
After the download is complete, enable Download Master. If you do not need the download function, you can uninstall Download Master here, but make sure that Download Master is enabled before uninstalling.
Install SmartDNS

Upload the software to the router's /tmp/mnt/sda1 directory using winscp. (or copy the network neighborhood to the sda1 shared directory)
```
ipkg install smartdns.xxxxxxx.mipsbig.ipk
```
Restart router

After the router is started, use nslookup -querytype=ptr smartdns to query the domain name.
See if the name item in the command result is displayed as smartdns or hostname, such as smartdns
```
pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
Server:         192.168.1.1
Address:        192.168.1.1#53

Non-authoritative answer:
smartdns         name = smartdns.
```

Note

In the above process, smartdns will be installed to the root directory of the U disk and run in optware mode.
Its directory structure is as follows: (only smartdns related files are listed here)

USB DISK
└── asusware.mipsbig
        ├── bin
        ├── etc
        |    ├── smartdns
        |    |     └── smartdns.conf
        |    └── init.d
        |          └── S50smartdns
        ├── lib
        ├── sbin
        ├── usr
        |    └── sbin
        |          └── smartdns
        ....

To modify the configuration, you can use ssh to login to the router and use the vi command to modify it.

vi /opt/etc/smartdns/smartdns.conf

smartdns.conf example:

# set listen port
bind []:53 
# set upstream servers
server 1.1.1.1
server-tls 8.8.8.8
# set domain rules
address /example.com/1.2.3.4
domain-rule /example.com/ -address 1.2.3.4

It can also be modified from Network Neighborhood. From the neighbor sharing directory sda1 you can't see the asusware.mipsbig directory, but you can directly enter asusware.mipsbig\etc\init.d in File Manager to modify it.

\\192.168.1.1\sda1\asusware.mipsbig\etc\init.d

optware/entware

Prepare

When using this software, you need to confirm whether the router supports USB disk and prepare a USB disk.
Install SmartDNS

Upload the software to /tmp directory of the router using winscp, and run the following command to install.
```
ipkg install smartdns.xxxxxxx.mipsbig.ipk
```
Modify the smartdns configuration
```
Vi /opt/etc/smartdns/smartdns.conf
```
smartdns.conf example:
```
# set listen port
bind []:53 
# set upstream servers
server 1.1.1.1
server-tls 8.8.8.8
# set domain rules
address /example.com/1.2.3.4
domain-rule /example.com/ -address 1.2.3.4
```
Note: if you need to support IPV6, you can set the work-mode to 2, this will disable the DNS service of dnsmasq, and smartdns run as the primary DNS server. Change SMARTDNS_WORKMODE in the file /opt/etc/smartdns/smartdns-opt.conf to 2.
```
SMARTDNS_WORKMODE="2"
```
Restart the router to take effect

After the router is started, use nslookup -querytype=ptr smartdns to query the domain name. See if the name item in the command result is displayed as smartdns or hostname, such as smartdns
```
Pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
Server: 192.168.1.1
Address: 192.168.1.1#53

Non-authoritative answer:
smartdns        name = smartdns.
```
Note: If the service does not start automatically, you need to set optware/entware to start automatically. For details, see the optware/entware documentation.

Windows 10 WSL Installation/WSL ubuntu

Install Windows 10 WSL ubuntu

Install the Windows 10 WSL environment and select Ubuntu as default distribution. Please refer to WSL installation instructions for installation steps

Install smartdns

download install package smartdns.xxxxxxxx.x86_64-linux-all.tar.gz，and unzip to the D:\ directory, after decompression, the directory is as follows:
```
D:\SMARTDNS
├─etc
│  ├─default
│  ├─init.d
│  └─smartdns
├─package
│  └─windows
├─src
└─systemd
```
Double-click install.bat in the D:\smartdns\package\windows directory for installation. Please enter the password for WLS ubuntu when input password.
Configuration

Edit smartdns.conf configuration file in D:\smartdns\etc\smartdns directory, you can configure the upstream server to smartdns. Refer to the Configuration Parameters for specific configuration parameters.
In general, you only need to add server [IP]:port, server-tcp [IP]:port configuration items.
Configure as many upstream DNS servers as possible, including servers at home and abroad. Please refer to the Configuration Parameters section for configuration parameters.

smartdns.conf example:
```
# set listen port
bind []:53 
# set upstream servers
server 1.1.1.1
server-tls 8.8.8.8
# set domain rules
address /example.com/1.2.3.4
domain-rule /example.com/ -address 1.2.3.4
```
Start Service

Double-click reload.bat in the D:\smartdns\package\windows directory for reload.
Forwarding DNS request to SmartDNS

Modify the default DNS server for Windows to 127.0.0.1, with these steps referred to IP configuration
Check if the service is configured successfully

Query domain name with nslookup -querytype=ptr smartdns
Check if the name item in the command result is displayed as smartdns or hostname, such as smartdns
```
pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
Server:         192.168.1.1
Address:        192.168.1.1#53

Non-authoritative answer:
smartdns         name = smartdns.
```

Configuration parameter

FAQ

What is the difference between SmartDNS and DNSMASQ?
Smartdns is not designed to replace DNSMASQ. The main function of Smartdns is focused on DNS resolution enhancement, the difference are:
- Multiple upstream server concurrent requests, after the results are measured, return the best results;
- address, ipset domain name matching uses efficient algorithms, query matching is faster and more efficient, and router devices are still efficient.
- Domain name matching supports ignoring specific domain names, and can be individually matched to IPv4, IPV6, and supports diversified customization.
- Enhance the ad blocking feature, return SOA record, this block ads better;
- IPV4, IPV6 dual stack IP optimization mechanism, in the case of dual network, choose the fastest network.
- Supports the latest TLS, HTTPS protocol and provides secure DNS query capabilities.
- DNS anti-poison mechanism, and a variety of mechanisms to avoid DNS pollution.
- ECS support, the query results are better and more accurate.
- IP blacklist support, ignoring the blacklist IP to make domain name queries better and more accurate.
- Domain name pre-fetch, more faster to access popular websites.
- Domain name TTL can be specified to make access faster.
- Cache mechanism to make access faster.
- Asynchronous log, audit log mechanism, does not affect DNS query performance while recording information.
- Domain group mechanism, specific domain names use specific upstream server group queries to avoid privacy leakage.
- The second DNS supports customizing more behavior.
What is the best practices for upstream server configuration?
Smartdns has a speed measurement mechanism. When configuring an upstream server, it is recommended to configure multiple upstream DNS servers, including servers in different regions, but the total number is recommended to be around 10. Recommended configuration
- Carrier DNS.
- Public DNS, such as 8.8.8.8, 8.8.4.4, 1.1.1.1.
For specific domain names, if there is a pollution, you can enable the anti-pollution mechanism.
How to enable the audit log
The audit log records the domain name requested by the client. The record information includes the request time, the request IP address, the request domain name, and the request type. If you want to enable the audit log, configure audit-enable yes in the configuration file, audit-size, Audit-file, audit-num configure the audit log file size, the audit log file path, and the number of audit log files. The audit log file will be compressed to save space.
How to avoid DNS privacy leaks
By default, smartdns will send requests to all configured DNS servers. If the upstream DNS servers record DNS logs, it will result in a DNS privacy leak. To avoid privacy leaks, try the following steps:
- Use trusted DNS servers.
- Use TLS servers.
- Set up an upstream DNS server group.
How to block ads
Smartdns has a high-performance domain name matching algorithm. It is very efficient to filter advertisements by domain name. To block ads, you only need to configure records like the following configure. For example, if you block *.ad.com, configure as follows:
```
Address /ad.com/#
```
The suffix mode of the domain name, filtering *.ad.com, # means returning SOA record. If you want to only block IPV4 or IPV6 separately, add a number after #, such as #4 is for IPV4 blocking. If you want to ignore some specific subdomains, you can configure it as follows. e.g., if you ignore pass.ad.com, you can configure it as follows:
```
Address /pass.ad.com/-
```
DNS query diversion
In some cases, some domain names need to be queried using a specific DNS server to do DNS diversion. such as.
```
.home -> 192.168.1.1
.office -> 10.0.0.1
```
The domain name ending in .home is sent to 192.168.1.1 for resolving The domain name ending in .office is sent to 10.0.0.1 for resolving Other domain names are resolved using the default mode. The diversion configuration for this case is as follows:
```
# Upstream configuration, use -group to specify the group name, and -exclude-default-group to exclude the server from the default group.
Server 192.168.1.1 -group home -exclude-default-group
Server 10.0.0.1 -group office -exclude-default-group
Server 8.8.8.8

#Configure the resolved domain name with specific group
Nameserver /.home/home
Nameserver /.office/office
```
You can use the above configuration to implement DNS resolution and offload. If you need to implement traffic distribution on the requesting port, you can configure the second DNS server. The bind configuration is added. The group parameter specifies the traffic distribution name.
```
Bind :7053 -group office
Bind :8053 -group home
```
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. if you want to disable IPV6 AAAA record complete, please try force-AAAA-SOA yes.
How to improve cache performance
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:
- Increase the number of cache records appropriately
  Set the number of cache records by cache-size. In the case of a query with a high pressure environment and a machine with a large memory, it can be appropriately adjusted.
- Set the minimum TTL value as appropriate
  Set the minimum DNS TTL time to a appropriate value by rr-ttl-min to extend the cache time. It is recommended that the timeout period be set to 10 to 30 minutes to avoid then invalid domain names when domain ip changes.
- Enable domain pre-acquisition
  Enable pre-fetching of domain names with prefetch-domain yes to improve query hit rate. by default, Smartdns will send domain query request again before cache expire, and cache the result for the next query. Frequently accessed domain names will continue to be cached. This feature will consume more CPU when idle.
- Cache serve expired feature
  Enable cache serve expired feature with serve-expired yes to improve the cache hit rate and reduce the CPU consumption. This feature will return TTL = 0 to the client after the TTL timeout, and send a new query request again at the same time, and cache the new results for later query.
How does the second DNS customize more behavior?
The second DNS can be used as the upstream of other DNS servers to provide more query behaviors. Bind configuration support can bind multiple ports. Different ports can be set with different flags to implement different functions, such as
```
# Binding 6053 port, request for port 6053 will be configured with the upstream query of the office group, and the result will not be measured. The address configuration address is ignored.
bind [::]:6053 -no-speed-check -group office -no-rule-addr
```
How to get SPKI of DOT
The SPKI can be obtained from the page published by the DNS service provider. If it is not published, it can be obtained by the following command, replace IP with your own IP.
```
echo | openssl s_client -connect '1.0.0.1:853' 2>/dev/null | openssl x509 -pubkey -noout | openssl pkey -pubin -outform der | openssl dgst -sha256 -binary | openssl enc -base64
```
How to solve the problem of slow DNS resolution in iOS system? Since iOS14, Apple has supported the resolution of DNS HTTPS (TYPE65) records. This function is used for solving problems related to HTTPS connections, but it is still a draft, and it will cause some functions such as adblocking fail. It is recommended to disable it through the following configuration.
```
force-qtype-SOA 65
```
How to resolve localhost ip by hostname?
smartdns can cooperate with the dhcp server of DNSMASQ to support the resolution of local host name to IP address. You can configure smartdns to read the lease file of dnsmasq and support the resolution. The specific configuration parameters are as follows, (note that the DNSMASQ lease file may be different for each system and needs to be configured according to the actual situation)
```
dnsmasq-lease-file /var/lib/misc/dnsmasq.leases
```
After the configuration is complete, you can directly use the host name to connect to the local machine. But need to pay attention:
- Windows system uses mDNS to resolve addresses by default. If you need to use smartdns to resolve addresses under Windows, you need to add . after the host name, indicating that DNS resolution is used. Such as ping smartdns.
How to use the domain set?
To facilitate configuring domain names by set, for configurations with /domain/, you can specify a domain name set for easy maintenance. The specific method is:
- Use domain-set configuration domain set file:
```
domain-set -name ad -file /etc/smartdns/ad-list.conf
```
The format of ad-list.conf is one domain per line:
```
ad.com
site.com
```
- To use the domain set, you only need to configure /domain/ to /domain-set:[collection name]/, such as:
```
address /domain-set:ad/#
domain-rules /domain-set:ad/ -a #
nameserver /domain-set:ad/server
...
```
How to use ipset and nftset?
Similar to Dnsmasq, smartdns supports ipset and nftset, and can transparently forward specific domain names through TPROXY. The comparison of transparent forwarding and tool modes is as follows:
1. Tools: iptable, nftable
  
  iptable: a mature routing rule configuration tool. nftable: A more powerful rule configuration tool that is becoming mainstream.
2. Mode: TPROXY, REDIRECT
  
  TPROXY: supports UDP and TCP forwarding, and the configuration is a little complicated. REDIRECT: only supports TCP, easy to configure.
Here we only take the configuration of the most commonly used iptable/REDIRECT with ipset as an example. The specific forwarding configuration is as follows:
- Set the list of domain names that need to be transparently forwarded in smartdns.conf, for example, example.com needs to be transparently forwarded. Then use the ipset option and set the ipset rule of example.com to proxy.
```
# set rules
# -ipset proxy: The matching domain name is set to ipset:proxy.
# -c none: Disable speed check.
# -address #6: Filter IPV6 record.
domain-rules /example.com/ -ipset proxy -c none -address #6
```
- Execute shell commands, set iptable rules, and transparently forward matching domain name requests. The rules are as follows:
```
# create ipset
ipset create proxy hash:net
# Set forwarding rules to forward matching requests to port 1081 of this machine
iptables -t nat -I PREROUTING -p tcp -m set --match-set proxy dst -j REDIRECT --to-ports 1081
```
- Open the forwarding program of REDIRECT mode on port 1081 of this machine.
More questions
More questions, please read issue: https://github.com/pymumu/smartdns/issues

Compile

smartdns contains scripts for compiling packages, supports compiling luci, debian, openwrt, optware installation packages, and can execute package/build-pkg.sh compilation.

Donate

If you feel that this project is helpful to you, please donate to us so that the project can continue to develop and be more perfect.

ReadMe_en.md 45 KB

Lịch sử Raw

SmartDNS

Table Of Content

Software Show

Features

Architecture

Usage

Use official installation source

Download the package

Standard Linux system installation/Raspberry Pi, X86_64 system

openwrt

ASUS router native firmware / Merlin firmware

optware/entware

Windows 10 WSL Installation/WSL ubuntu

Configuration parameter

FAQ

Compile

Donate

PayPal

Alipay

Wechat

Open Source License

ReadMe_en.md 45 KB Lịch sử Raw

SmartDNS

Table Of Content

Software Show

Features

Architecture

Usage

Use official installation source

Download the package

Standard Linux system installation/Raspberry Pi, X86_64 system

openwrt

ASUS router native firmware / Merlin firmware

optware/entware

Windows 10 WSL Installation/WSL ubuntu

Configuration parameter

FAQ

Compile

Donate

PayPal

Alipay

Wechat

Open Source License

ReadMe_en.md 45 KB

Lịch sử Raw