sshlab

ssh lab with docker. Usecases of redirection ports.

• _ssh: replace ssh command with some hacks to generate host file for ip resolution.
• run_ssh.sh: run sshlab docker instance with hostname as parameter.
• ip.sh: extract IP addresses from docker configuration and store in host file (default myhosts). Called on running docker image.
• resolve.sh: read host file to find which ip is matching hostname passed as parameter. Called when running _ssh.

Redirection port SSH

I - local port redirection:

client ssh et tcp are on same machine.

ssh -L port-local:HOSTNAME:port-dist machine-dist

M0:port-local -----> machine-distant:22 --------> HOSTNAME:port-dist

I-a- local connection between 127.0.0.1/ssh0 and ssh1 par ssh2

ssh -L 12346:172.19.0.1:8934 [email protected] ssh -L 12346:ssh0:8934 aldu@ssh2

ssh0: nc -l -p 8934 172.19.0.1 ssh0: nc 127.0.0.1 12346

I-b- connection between 127.0.0.1 and ssh1/127.0.0.1

ssh -L 12347:localhost:8934 [email protected] ssh -L 12347:localhost:8934 aldu@ssh2

sur server ssh2: nc -l -p 8934 127.0.0.1 sur client ssh0: nc 127.0.0.1 12347

II - distant port redirection

Ssh client and tcp server on same side.

ssh -R port-distant:HOSTNAME:port-local machine-distant

machine-distante:port-distant ----> M0 ---------> HOSTNAME:port-local

II-a- redirection between distant machines ssh1 and ssh2

ssh -R 12347:ssh2:9743 aldu@ssh1

redirect from ssh1/127.0.0.1:12347 to ssh2:9743 through 172.19.0.1

ssh2: nc -l -p 9743 ssh1: nc localhost 12347

II-b- Distant machines redirection ssh2 and ssh1

ssh -R 23478:ssh1:7777 aldu@ssh2

ssh2: nc -v localhost 23478 ssh1: nc -l -p 7777 ssh1

II-c- redirection M0 ssh1

ssh -R 12456:localhost:8956 aldu@ssh1

ssh1: nc -v localhost 12456 M0: nc -l -p 8956 localhost