rust 下载库时无法连接到端口

PS E:\Rust\Novum> cargo install postgres
    Updating `ustc` index
warning: spurious network error (3 tries remaining): [7] Could not connect to server (Failed to connect to 127.0.0.1 port 23457 after 2050 ms: Could not connect to server); class=Net (12)
warning: spurious network error (2 tries remaining): [7] Could not connect to server (Failed to connect to 127.0.0.1 port 23457 after 2042 ms: Could not connect to server); class=Net (12)
warning: spurious network error (1 tries remaining): [7] Could not connect to server (Failed to connect to 127.0.0.1 port 23457 after 2023 ms: Could not connect to server); class=Net (12)

在config.toml里如下：

[source.crates-io]
replace-with = 'aliyun'


[source.aliyun]
registry = "sparse+https://mirrors.aliyun.com/crates.io-index/"