SSH Tunnel

An SSH Tunnel is a communication tunnel that uses an SSH protocol.

• Context:
  • It can (often) be created with an SSH Client.
• See: Network Tunnel.

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References

2011

• (Melli, 2011) ⇒ Multi-hop SSH Tunneling Examples
  • localhost$ ssh -t -L 5679:localhost:5679 ubuntu@SERVER1 ssh -L 5679:localhost:3306 SERVER2
localhost$ mysql -P 5679 -uroot -pPASSWORD .

  • localhost$ ssh -t -L 5679:localhost:5679 ubuntu@SERVER1 ssh -L 5679:localhost:22 SERVER2
localhost$ scp -P 5679 localfile.txt ubuntu@localhost:/tmp

    ** localhost$ ssh -t -L 5679:SERVER2:22 ubuntu@SERVER1
localhost$ scp -P 5679 localfile.txt ubuntu@localhost:/tmp

    ** localhost$ EMR_Master_DNS=ec2-54-211-23-27.compute-1.amazonaws.com
localhost$ SSH_Tunnel_Port=8192
localhost$ EMR_Port=8192
localhost$ ssh -vvv \
-o ServerAliveInterval=10 \
-i ~/.ssh/myemr.pem \
-N -L ${SSH_Tunnel_Port}:${EMR_Master_DNS}:${EMR_Port} \
hadoop@${EMR_Master}

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