请教下如何自定义DOH(https_dns_proxy)？

[Myzhivago]

请教下作者在[DNS设定]->[选择外国DNS]中，选择[https_dns_proxy]，默认使用Cloudflare的DOH，Cloudflare的DOH目前都已经屏蔽无法使用，如何自定义DOH。

[cary-sas]

https_dns_proxy itself doesn’t have a direct --proxy command-line option, but it does honor standard proxy environment variables such as HTTPS_PROXY, http_proxy, or ALL_PROXY. That means you can “chain” DNS-over-HTTPS queries through another proxy (e.g., Shadowsocks, SOCKS, HTTP proxy, etc.) by setting the appropriate environment variable before invoking https_dns_proxy.

If you want to make it part of your shell script (i.e., only set the variable if https://cloudflare-dns.com is blocked in your region), you could do something like:

Example: Using a SOCKS5 proxy on 127.0.0.1:23456

if [ "$ss_foreign_dns" == "6" ]; then
    echo_date "开启 https_dns_proxy，用于dns解析..."

    # If https://cloudflare-dns.com is unreachable directly, use a proxy
    export HTTPS_PROXY="socks5://127.0.0.1:23456"

    if [ -n "$ss_basic_server_ip" ]; then
        # 用 chnroute 去判断 SS 服务器在国内还是在国外
        ipset test chnroute $ss_basic_server_ip > /dev/null 2>&1
        if [ "$?" != "0" ]; then
            ss_real_server_ip="$ss_basic_server_ip"
        else
            ss_real_server_ip="8.8.8.8"
        fi
    else
        ss_real_server_ip="8.8.8.8"
    fi

    https_dns_proxy \
      -u nobody \
      -p 7913 \
      -b 8.8.8.8,1.1.1.1,8.8.4.4,1.0.0.1,145.100.185.15,145.100.185.16,185.49.141.37 \
      -e "$ss_real_server_ip/16" \
      -r "https://cloudflare-dns.com/dns-query?ct=application/dns-json&" \
      -d
unset HTTPS_PROXY
fi

This way, the DNS queries always go through your proxy if direct access to cloudflare-dns.com is blocked.

[cary-sas]

Or you can change the DOH like this, still in file ssconfig.sh,

https_dns_proxy \
  -u nobody \
  -p 7913 \
  -b 8.8.8.8,1.1.1.1 \
  -e "$ss_real_server_ip/16" \
  -r "https://dns.google/dns-query?ct=application/dns-json&" \
  -d

Popular DoH Endpoints
Here are some well-known DoH providers:

Google
Endpoint: https://dns.google/dns-query
Optional JSON param: ?ct=application/dns-json
Cloudflare
Endpoint: https://cloudflare-dns.com/dns-query
Optional JSON param: ?ct=application/dns-json
Quad9
Endpoint: https://dns.quad9.net/dns-query
AdGuard
Endpoint: https://dns.adguard.com/dns-query
NextDNS
Endpoint: https://dns.nextdns.io/YOUR_NEXTDNS_ID
(May require an ID or special parameter for configuration.)

Anyway, ChatGPT can teach you a lot if you are interested in this. For me, I just use ChinaDNS-ng.

[Myzhivago]

Thank you very much. I will try following what the author said.

According to the second comment by the author which is easily understand, i found file"ssconfig.sh" in the folder "/jffs/.koolshare/ss". Then I used the "vi" command to repalce the cloudflare DOH. Now I am still in testing new DOH.