So to solve all the problems with installing dnscrypt with entware (or similar) then setting up various scripts to handle dnscrypt-proxy starting up including the ntp issue, I made my own installer for dnscrypt-proxy.

Requirements:

• ARM based ASUS routers
• asuswrt-merlin firmwares or compatible
• jffs support and script enabled

Incompatibilities:

• No known issue

Current features:

• dnscrypt-proxy version 2 with DoH and DNSCrypt version 2 protocols, multiple resolvers, and other features
• Running as nobody through nonroot binary (using --user requires change to passwd)
• Support ARM and MIPSEL based routers
• Support OpenDNS dynamic IP update by entering your OpenDNS account information
• Handling ntp update at router boot up by starting dnscrypt-proxy with cert_ignore_timestamp option
• Redirect all DNS queries on your network to dnscrypt if user chooses to
• Install haveged/rngd for better speed with dnscrypt and other cryptographic applications
• Support various HW RNG such as TrueRNG (tested with v3), TrueRNGpro, OneRNG, EntropyKey
• Ability to setup a swap file
• Ability to setup timezone file (/etc/localtime) used by dnscrypt-proxy and other apps
• Ability to reconfigure dnscrypt-proxy without reinstalling unlike previous installer for dnscrypt-proxy version 1.x.x

Changelog:

https://github.com/thuantran/dnscrypt-asuswrt-installer/commits/master

Install/Update/Reconfig/Uninstall:

Run this command from ssh shell and following the prompt for dnscrypt-proxy version 2:

curl -L -s -k -O https://raw.githubusercontent.com/AlexPeregudov/dnscrypt-asuswrt-installer/master/installer && sh installer ; rm installer

User can safely update from dnscrypt-proxy version 1 to version 2 with above command.

If you want to use dnscrypt-proxy version 1, run this command:

curl -L -s -k -O https://raw.githubusercontent.com/AlexPeregudov/dnscrypt-asuswrt-installer/dnscrypt-proxy-v1/installer && sh installer dnscrypt-proxy-v1; rm installer

How to check if it works

If you use OpenDNS, run this command on Windows cmd

nslookup -type=txt debug.opendns.com

You should see something like

"dnscrypt enabled (717473654A614970)"

in result.

Otherwise running this command:

pidof dnscrypt-proxy

will return a number.

How to report issue:

I need following directory and files:

/jffs/dnscrypt
/jffs/scripts/dnsmasq.postconf
/jffs/scripts/firewall-start
/jffs/scripts/wan-start

One can use this command to create a tar archive of these files:

echo .config > exclude-files; tar -cvf dnscrypt.tar -X exclude-files /jffs/dnscrypt /jffs/scripts/dnsmasq.postconf /jffs/scripts/firewall-start /jffs/scripts/wan-start ; rm exclude-files

in current directory and send me the archive for debug.

I also need follwoing information:

• Which dns server you selected during dnscrypt installtion
• Which router you're using
• Firmware and its version

How I made this:

• Use dnscrypt-proxy binary packages from https://github.com/jedisct1/dnscrypt-proxy
• Compiling and stripping required binaries using firmware building toolchain from asuswrt-merlin
• Write the installer script with stuffs inspired from entware-setup.sh from asuswrt-merlin
• You can look at all the stuffs here https://github.com/thuantran/dnscrypt-asuswrt-installer