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Secure communication through ssh tunneling

Secure communication through ssh tunneling. By Chris Zachor CS 650. Outline. Introduction SSH Overview Scenarios How To: Results Conclusion. Introduction. Problem: How do we communicate securely over an insecure network? Solution: Use an SSH encrypted tunnel

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Secure communication through ssh tunneling

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  1. Secure communication through ssh tunneling By Chris Zachor CS 650

  2. Outline • Introduction • SSH Overview • Scenarios • How To: • Results • Conclusion

  3. Introduction • Problem: How do we communicate securely over an insecure network? • Solution: Use an SSH encrypted tunnel • We will focus on passive eavesdropping attacks which violate confidentiality

  4. SSH Overview • A secure replacement for insecure applications such as telnet and rlogin • A symmetric key is negotiated using public and private keys • The client is then authenticated on the server and allowed to execute commands remotely • This includes allowing the server to forward data for the client

  5. Scenario 1: Unencrypted

  6. Scenario 1: Unencrypted

  7. Scenario 1: Unencrypted

  8. Scenario 1: Unencrypted

  9. Scenario 2: Encrypted

  10. What You Will Need • SSH server (OpenSSH) • SSH client • Proxy Aware Application/Proxy wrapper • Dynamic DNS Service (Optional)

  11. Creating The Tunnel

  12. Configuring Your App

  13. Additional Settings

  14. Results • So what have we achieved through the use of this SSH tunnel?

  15. Before Tunnel

  16. After Tunnel

  17. Conclusion • Using an SSH tunnel we can protect our communications on networks that are not trusted • This is useful against passive attacks where the attacker is simply eavesdropping • There is still the possibility of Man-In-The-Middle attacks if you are not careful

  18. Questions/Comments?

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