我有一些伺服器，透過 SSH 連接到它們可能需要一分鐘左右的時間才能收到提示。我連接了ssh -vvv，它掛起後身份驗證成功，因此這不是常見的事情（例如UseDNS no，禁用 GSSAPI 等）。
在身份驗證後的日誌中，我看到以下內容：
debug1: Authentication succeeded (publickey).
Authenticated to xxxx.example.com ([2a01:.......]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting [email protected]
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug1: ENABLE_VIRTUAL_TERMINAL_INPUT is supported. Reading the VTSequence from console
debug3: This windows OS supports conpty
debug1: ENABLE_VIRTUAL_TERMINAL_PROCESSING is supported. Console supports the ansi parsing
debug3: Successfully set console output code page from:65001 to 65001
debug3: Successfully set console input code page from:437 to 65001
然後它掛起一段時間，然後像平常一樣繼續：
debug3: send packet: type 80
debug3: send packet: type 80
debug3: receive packet: type 80
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug3: receive packet: type 4
debug1: Remote: /home/daniel/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug3: receive packet: type 4
debug1: Remote: /home/daniel/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 0: callback start
... cut for brevity ...
然後立即連接。
實際會話很好，並且沒有緩慢的情況，但我無法弄清楚最初連接時掛起期間發生了什麼。
有任何想法嗎？