ssh proxy

• nixCraft
• SSH Proxy 와 점프호스트 ( 경유서버를 이용한 목적서버 연결 )
• ssh를 socks proxy를 통해서 접속하기
• “bash: nc: command not found” error on ssh multi-hop [closed]
• Bash script to setup a temporary SSH tunnel

#1. Pseudo Terminal
ssh -tt server1 ssh server2

#2. ProxyCommand
ssh -o ProxyCommand="ssh -W %h:%p server1" server2

#3. ~/.ssh/config
Host server1
    HostNmae domain.com
    Port 22
    User Username
Host s2 
    HostName server2 
    User user2 
    IdentityFile ~/.ssh/server2_id_rsa
    ProxyCommand ssh -W server2:22 server1
    #ProxyCommand ssh -xaqW%h:%p server1

chmod 600 ~/.ssh/config
ssh s2
ssh root@s2

#4. netcat 을 이용한 ProxyCommand
ssh -o ProxyCommand="ssh server1 nc server2 22" server2

$ ssh -tt root@s1 ssh -tt root@s2 -p2220 ssh root@s3
root@s1's password:
root@s2's password:
root@s3's password:
$ exit
logout
Connection to paranoid closed.
Killed by signal 1.
$