java - 通过 SSH 连接服务器时出现异常

Question

我正在尝试在 Java 应用程序中使用 SSH 从 Solaris 服务器连接到外部服务器。一些我们在验证用户身份时但在 60 分钟后遇到异常的情况。我们如何才能将异常时间减少到 5 分钟左右。

连接 IP:PORT 时出现问题java.io.IOException:连接到 IP:PORT 时出现问题

时间2和时间3之间的时间差约为60分钟。这次我想减少。

请在下面找到我们正在使用的代码片段。

try
{
    timeout = 1;
    if (connection == null)
    {
        //time1
        connection = new ch.ethz.ssh2.Connection(getIpAddress(), Integer.parseInt(getPort()));
        if (connection == null)
        {
            System.out.println("connection is null");
        }
        else
        {
            //time2
            connection.connect(null, timeout, 0);
        }
    }
}
catch (Exception t)
{
    //time3
    System.out.println(t.getLocalizedMessage());
    System.out.println(t.toString());
}

Edit1:检查SSH相关配置文件后，我发现KeyRegenesisInterval的值为3600秒。这对解决这个问题有用吗？如果我将其值减少到大约 30 分钟或 5 分钟，可能会出现什么结果。

Answer 1

让我总结一下您的问题，如果有问题请纠正。

1. 您无法连接到 SSH 服务器。
2. 60 分钟后引发异常。

根据下面的方法的抛出部分connect(ServerHostKeyVerifier, int, int) ，我猜您可能会遇到由于代理错误而无法返回正确 HTTP 响应的问题。使用直接互联网连接来查看问题是否消失。

Throws:

java.io.IOException - If any problem occurs, e.g., the server's host key is not accepted by the verifier or there is problem during the initial crypto setup (e.g., the signature sent by the server is wrong).

In case of a timeout (either connectTimeout or kexTimeout) a SocketTimeoutException is thrown.

An exception may also be thrown if the connection was already successfully connected (no matter if the connection broke in the mean time) and you invoke connect() again without having called close() first.

If a HTTP proxy is being used and the proxy refuses the connection, then a HTTPProxyException may be thrown, which contains the details returned by the proxy. If the proxy is buggy and does not return a proper HTTP response, then a normal IOException is thrown instead.