[Question] <title>test connection Peer connection failed: open failed but mobaxterm connection is ok

### Question

监控实例突然不可用，ssh无法连接，但是通过mobaxterm是正常ssh的，密码也对，切换oracle可以，但是root突然不行。

The report mentions an unavailable monitoring instance, SSH failure for root, and successful access through MobaXterm and the oracle account, but names no repository files, tests, or entry points. Start by clarifying the affected monitor configuration and reproducing the connection path; done should include a confirmed cause and a specific repository change or documented resolution.

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