SSH 跳板机（堡垒机）登录大法

最新推荐文章于 2025-06-17 11:49:32 发布

JohnCusack

最新推荐文章于 2025-06-17 11:49:32 发布

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分类专栏： linux 文章标签： ssh

本文链接：https://blog.youkuaiyun.com/Albert0420/article/details/51729583

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本文介绍如何通过SSH实现从本地主机(localhost)经由认证主机(authhost)登录远程主机(remotehost)的方法，并详细说明了双跳板登录的具体步骤及端口转发的配置过程。

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SSH log into remote host via auth host

A: local host, B: auth host, C: remote host

double SSH

ssh <userb>@<ipb> -p <portb>
[Enter]<pwdb>
[type :]ssh <userc>@<ipc> -p <portc> [default: 22]
[Enter]<pwdc>

SSH port forward

ssh -L <porta>:<ipc>:<portc> <userb>@<ipb> -p <portb>
[Enter]<pwdb>
[open a new terminal]
ssh <userc>@localhost -p <porta>
[Enter]<pwdc>

Note: If you want to put this terminal to background, append the option “-Nf”]
-f means “Requests ssh to go to background just before command execution.”
-N means “Do not execute a remote command.”
if -N omitted, error occurs “Cannot fork into background without a command to execute.” So you have to imply that no cmd is gonna execute. Only pwd is typed in after the port forward cmd.
After this, you continue to type ssh cmd in local terminal.