关于dns泄露的问题

[fyhong]

如果我用命令行直接运行
./ssrust --dns 210.220.163.82 --outbound-bind-interface ppp0 -k test -m chacha20-ietf-poly1305 -s 0.0.0.0:40001
我到https://surfshark.com/zh/dns-leak-test检测dns，

是上面的结果

但如果我用以下的配置文件，再用./ssrust -c test.json 来运行,再检测dns,就会跳回vps原来的dns.这是什么原因
{
"servers": [
{"server": "0.0.0.0", "server_port": 40001, "dns_cache_size": 0, "mode": "tcp_and_udp", "password": "test", "method": "chacha20-ietf-poly1305", "dns": "210.220.163.82", "outbound_bind_interface": "ppp0" }
]
}

[zonyitoo]

There is no dns configuration key for server.

[fyhong]

那为什么我直接用命令行它是生效的？

[zonyitoo]

Because there is a --dns command line option, but no dns in configuration for server.

[fyhong]

但是我这份配置里面是有配置dns的
{
"servers": [
{"server": "0.0.0.0", "server_port": 40001, "dns_cache_size": 0, "mode": "tcp_and_udp", "password": "test", "method": "chacha20-ietf-poly1305", "dns": "210.220.163.82", "outbound_bind_interface": "ppp0" }
]
}