"ssh -vT [e-mail]" 结果出现错误 "kex_exchange_identification: Connection closed by remote host"。

Question

我配置SSH密钥的方式是，我生成了一个新的SSH密钥，并将其添加到了我的GitHub账户中，但出现了一些问题。我尝试了很多方法，但无法解决。

ssh -vT [e-mail]

输出：

OpenSSH_8.1p1, OpenSSL 1.1.1d  10 Sep 2019
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to github.com [111.40.234.2] port 22.
debug1: Connection established.
debug1: identity file /c/Users/dell/.ssh/id_rsa type 0
debug1: identity file /c/Users/dell/.ssh/id_rsa-cert type -1
debug1: identity file /c/Users/dell/.ssh/id_dsa type -1
debug1: identity file /c/Users/dell/.ssh/id_dsa-cert type -1
debug1: identity file /c/Users/dell/.ssh/id_ecdsa type -1
debug1: identity file /c/Users/dell/.ssh/id_ecdsa-cert type -1
debug1: identity file /c/Users/dell/.ssh/id_ed25519 type -1
debug1: identity file /c/Users/dell/.ssh/id_ed25519-cert type -1
debug1: identity file /c/Users/dell/.ssh/id_xmss type -1
debug1: identity file /c/Users/dell/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.1
kex_exchange_identification: Connection closed by remote host

我能做什么？

- aptx1231

---

你似乎正在使用Windows和Cygwin。这些细节可能应该在你的问题中提到。另外，你的ssh客户端是如何配置的？你具体是如何告诉它使用哪个密钥来连接Github的？ - tripleee

Answer 1

我猜您在网络中使用VPN连接，而且该VPN可能已禁用端口22，因此您需要取消VPN使用或将GitHub连接更改为端口443。

编辑~/.ssh/config文件并保存。

Host github.com
    HostName ssh.github.com
    User git
    Port 443

再次测试（以root身份）：

ssh -T [e-mail]

输出：

The authenticity of host '[ssh.github.com]:443 ([20.205.243.160]:443)' can't be established.
ED25519 key fingerprint is SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '[ssh.github.com]:443' (ED25519) to the list of known hosts.
Hi xxxxxx You've successfully authenticated, but GitHub does not provide shell access.

- jason

Answer 2

如果您只有一把密钥，可以尝试使用旧的PEM格式重新生成它，并且不设置密码，以进行测试：

ssh-keygen -t rsa -P "" -m PEM

将 id_rsa.pub 的内容复制到您的 GitHub 个人资料中，然后重试。

- VonC

Answer 3

我猜想你的~/.ssh/里有太多的密钥。请将ssh指向你所使用的确切密钥。在~/.ssh/config中：

Host github.com
    User git
    HostName github.com
    IdentityFile ~/.ssh/id_rsa # or whatever key you use with Github

然后再次尝试 ssh -Tv [e-mail]。

- phd

---

我只有一个密钥，我尝试了这种方法，但仍然不行。 - aptx1231