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autossh -L 使用与 ssh 相同的命令时失败，如何使其工作？

tag-icon • tag-icon linux ssh fedora ssh-tunnel
autossh -L 使用与 ssh 相同的命令时失败，如何使其工作？

我正在 Fedora core 15 上运行 yum 安装的 autossh 1.4a，并附带最新更新。

这有效：

ssh -L 9000:valid.fqdn:80 another_valid_fqdn

但是，autossh 失败并打印其使用消息：

ssh -L 9000:valid.fqdn:80 another_valid_fqdn

usage: autossh [-V] [-M monitor_port[:echo_port]] [-f] [SSH_OPTIONS]

    -M specifies monitor port. May be overridden by environment
       variable AUTOSSH_PORT. 0 turns monitoring loop off.
       Alternatively, a port for an echo service on the remote
       machine may be specified. (Normally port 7.)
    -f run in background (autossh handles this, and does not
       pass it to ssh.)
    -V print autossh version and exit.

Environment variables are:
    AUTOSSH_GATETIME   - how long must an ssh session be established
                         before we decide it really was established
                         (in seconds)
    AUTOSSH_LOGFILE    - file to log to (default is to use the syslog
                         facility)
    AUTOSSH_LOGLEVEL   - level of log verbosity
    AUTOSSH_MAXSTART   - max times to restart (default is no limit)
    AUTOSSH_MESSAGE    - message to append to echo string (max 64 bytes)
    AUTOSSH_PATH       - path to ssh if not default
    AUTOSSH_PIDFILE    - write pid to this file
    AUTOSSH_POLL       - how often to check the connection (seconds)
    AUTOSSH_FIRST_POLL - time before first connection check (seconds)
    AUTOSSH_PORT       - port to use for monitor connection
    AUTOSSH_DEBUG      - turn logging to maximum verbosity and log to

有什么想法可以让 autossh 工作吗？根据使用信息，它应该直接采用 ssh 选项。

答案1

监视端口显然不是可选的。尝试autossh -M 0 -L 9000:host:80 ssh_host

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