How do I set custom DNS servers for a proxy?

[ghost]

I'm trying to set a public DNS server such as Cloudflare on my proxy (I don't own the server or have access to server configs, I'm just the client) but whatever I try it doesn't work!

Here's my sslocal config json:

{
    "servers": [
      {
        "remarks": "Shadowsocks proxy",
        "flag" : "NL",
        "server": "x.x.x.x",
        "server_port": 1234,
        "password": "xxx",
        "method": "chacha20-ietf-poly1305",
        "nameserver": "1.1.1.1"
      }
    ],
    "local_address": "127.0.0.1",
    "local_port": 1081,
    "mode": "tcp_and_udp",
    "dns": "cloudflare"
}

I check with browserleaks.com and they are not taking over!

[zonyitoo]

The dns field is for customizing the DNS server that sslocal uses for resolving servers' domain names and target domain for ACL checking.

[zonyitoo]

What do you mean not working?

[database64128]

I don't own the server or have access to server configs

Unfortunately, what you want to accomplish is best to be done on the server side (in ssserver's config). It's still possible to configure a local resolver to use your desired upstream DNS, but it's definitely not sslocal's job to do that.

[laikitleung]

nat a virtual ip such as 255.255.255.53,then set your proxy nameserver 255.255.255.53
iptables -t nat -A OUTPUT -p udp --dport 53 -d 255.255.255.53 -j DNAT --to-destination 1.1.1.1:53
iptables -t nat -A OUTPUT -p tcp --dport 53 -d 255.255.255.53 -j DNAT --to-destination 1.1.1.1:53

[ghost]

Thanks!