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使用跳转主机时 SSH 连接卡住

tag-icon • tag-icon networking command-line ssh
使用跳转主机时 SSH 连接卡住

在我的工作中，我们有一个跳转主机，我必须通过它连接到集群。通常，连接语句将是

ssh -t herp@jumphost ssh cluster

此外，此连接必须在公司 VPN 内进行。现在，我想cluster使用 Windows 10 上的 VS Code 进行连接。这会产生几个问题。这篇博文建议为此使用 ssh 配置文件，因此我在 C:\Users\Herp\.ssh\config 中添加了以下几行：

Host jumphost
   HostName jumphost
   User herp

Host cluster-work
   User herp
   HostName cluster
   ProxyCommand ssh -tt jumphost

然后，当我尝试使用cmd.exe或连接时，PowerShell我得到：

$ ssh cluster -v
OpenSSH_for_Windows_8.1p1, LibreSSL 3.0.2
debug1: Reading configuration data C:\\Users\\Herp/.ssh/config
debug1: C:\\Users\\Herp/.ssh/config line 18: Applying options for cluster-work
debug1: Executing proxy command: exec ssh -tt jumphost
debug1: identity file [...]
[...]
debug1: identity file [...]
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_8.1
herp@jumphost's password: <I enter the PW>
debug1: kex_exchange_identification: banner line 0: Last login: Mon Jun 28 20:50:42 2021 from <some IP>
debug1: kex_exchange_identification: banner line 1:
debug1: Remote protocol version 2.0, remote software version OpenSSH_for_Windows_8.1
debug1: match: OpenSSH_for_Windows_8.1 pat OpenSSH* compat 0x04000000
debug1: Authenticating to cluster:22 as 'herp'
debug1: SSH2_MSG_KEXINIT sent
Bad packet length 218783296.
ssh_dispatch_run_fatal: Connection to UNKNOWN port 65535: message authentication code incorrect

有时，最后几行会变成

debug1: kex_exchange_identification: banner line 0: Last login: Mon Jun 28 20:50:42 2021 from <some IP>
debug1: kex_exchange_identification: banner line 1:
debug1: kex_exchange_identification: banner line 2: \033]0;herp@cluster:~\033[?1034h[herp@cluster ~]$ SSH-2.0-OpenSSH_for_Windows_8.1
debug1: kex_exchange_identification: banner line 3: -bash: SSH-2.0-OpenSSH_for_Windows_8.1: command not found
debug1: kex_exchange_identification: banner line 4: \033]0;herp@cluster:~[herp@cluster ~]$

如果我使用-t而不是，则-tt输入ProxyCommand密码之前和之后的最后几行是

Pseudo-terminal will not be allocated because stdin is not a terminal.
herp@jumphost's password: <I enter the PW>
-bash: line 1: $'SSH-2.0-OpenSSH_for_Windows_8.1\r': command not found

然后就cmd.exe冻结了所以我不得不关闭窗口。

我怎样才能使此连接正常工作？

更新

使用-J标志而不是-t导致：

> ssh -J herp@jumphost herp@cluster
herp@jumphost's password: <I enter the PW>
channel 0: open failed: administratively prohibited: open failed
stdio forwarding failed

更新 2

我在 WSL 中重复了此操作，结果相同。所以这不仅仅是 Windows 10 的问题。

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