ssh端口通过堡垒主机转发到VPC中的弹性搜索集群

Question

我想在我的Macbook上运行一些代码，通过一个堡垒主机访问VPC中的一个Elasticsearch集群。

这是我的ssh隧道命令：

ssh -i ~/Downloads/keypairs/20210402-02.pem ubuntu@ec2-123-456.us-west-2.compute.amazonaws.com -N -L 9200:https://vpc-123-es-domain-20210406-3abc123.us-west-2.es.amazonaws.com:443

然而，这给我带来了以下错误：

bind [0.0.35.240]:443: Can't assign requested address
channel_setup_fwd_listener_tcpip: cannot listen to port: 443
Could not request local forwarding.

添加的-v给出了以下详细信息：

OpenSSH_8.1p1, LibreSSL 2.7.3
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 47: Applying options for *
debug1: Connecting to ec2-123-456.us-west-2.compute.amazonaws.com port 22.
debug1: Connection established.
debug1: identity file /Users/fisher/Downloads/keypairs/20210402-02.pem type -1
debug1: identity file /Users/fisher/Downloads/keypairs/20210402-02.pem-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.2p1 Ubuntu-4ubuntu0.2
debug1: match: OpenSSH_8.2p1 Ubuntu-4ubuntu0.2 pat OpenSSH* compat 0x04000000
debug1: Authenticating to ec2-123-456.us-west-2.compute.amazonaws.com:22 as 'ubuntu'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:7C3VWdZcCglhxtk4ejyayRABeEsVgEMgj+Fp4K3DNFk
debug1: Host 'ec2-123-456.us-west-2.compute.amazonaws.com' is known and matches the ECDSA host key.
debug1: Found key in /Users/fisher/.ssh/known_hosts:9
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: /Users/fisher/Downloads/keypairs/20210402-02.pem  explicit
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,sk-ssh-ed25519@openssh.com,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256@openssh.com>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /Users/fisher/Downloads/keypairs/20210402-02.pem
debug1: Authentication succeeded (publickey).
Authenticated to ec2-123-456.us-west-2.compute.amazonaws.com ([54.214.52.40]:22).
debug1: Local connections to 9200:443 forwarded to remote address //vpc-123-es-domain-20210406-3abc123.us-west-2.es.amazonaws.com:443
debug1: Local forwarding listening on 0.0.35.240 port 443.
bind [0.0.35.240]:443: Can't assign requested address
channel_setup_fwd_listener_tcpip: cannot listen to port: 443
Could not request local forwarding.
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug1: Remote: /home/ubuntu/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding

我的研究指出，我应该添加-4，以强制它使用IPv4而不是IPv6，这不是我的情况，也不起作用。

对于如何使隧道连接，任何人都能有所了解吗？

Ubuntu是bastion主机的根用户：

ubuntu@ip-11-0-31-228:~$ sudo -s
root@ip-10-0-31-228:/home/ubuntu# id
uid=0(root) gid=0(root) groups=0(root)

谢谢!

Answer 1

-L 9200:https://vpc-123-es-domain-20210406-3abc123.us-west-2.es.amazonaws.com:443

看来你的转发指令可能是错误的。ssh将其解释为四部分形式，如下所示：

1. 本地地址9200 (是，这是有效的IP地址格式。)
2. 本地端口"https"，即端口443
3. 远程地址pc-123-es-域-20210406-3 123 123等。
4. 远程端口443

根本的问题是，您将URL指定为远程，而不是仅指定主机名。试试这个：

-L 9200:vpc-123-es-domain-20210406-3abc123.us-west-2.es.amazonaws.com:443

Answer 2

这是我自己在深入研究这个问题之后犯的一个愚蠢的错误，这句话就把它说出来了：

debug1: Local connections to 9200:443 forwarded to remote address //vpc-123-es-domain-20210406-3abc123.us-west-2.es.amazonaws.com:443

如果它是正确的，它将如下所示：

debug1: Local connections to LOCALHOST:9200 forwarded to remote address vpc-es-domain-20210406-3abc123.us-west-2.es.amazonaws.com:443

有两件事帮助我完成了这个任务：

1. remove the "https://" in front of the vpc endpoint
2. stop any other local processes that run on port 9200 on my Macbook.