Version History

V 0.0.19 (Future)

• Encrypt Communications
• Check server certificate

V 0.0.18 (Future)

• Send logs to the server
• Software update
• Automate key registeration + generation

V 0.0.17 (Future)

• Different message types and commands
• Agility cleanup
• Clean up timings

V 0.0.16 (Future)

• Seperate processes for actions
• Solved reconnection problem due to a race condition

V 0.0.15 (Deployed Beta)

• Client sends the ping to the server
• Client tries to establish a new connection if it does not receive a reply

V 0.0.12

• Replies to ping

V 0.0.1

• Improved status message check for reverse ssh task
• Added software version

Debugging Info helps to see packets going around
sudo tcpflow -i any -C -J port 9000

This is also a thing but didn't use it much
tcpdump port 9000

Setup Instructions

add this to the /etc/rc.local file

cd /home/pi/centree_tunnel_client
screen -d -m -s /bin/bash python3 main.py

add the ssh key located in the resources folder to /home/pi/.ssh/ folder

execute this command once to get the server fingerprint on the client
ssh -N -R 7002:localhost:22 -i /home/pi/.ssh/ssh_server_key [email protected]

Commands

PING Message {
"payload": "{"utility_type": "PING"}",
"sender": "server",
"to": "floatingPi",
"type": "utility"
}

when the client receives the ping message it replies with ping,

{
"payload": "ping reply",
"sender": "floatingPi",
"to": "server",
"type": "utility"
}

This ensures that the tcp conenction remains open! wo la!

REVERSE SSH { "payload": "{"parameters": "{\"remote_port\": 7005, \"name\": \"shell connection\", \"local_port\": 22}", "action_type": "SSH", "command": "SSH-Start"}", "sender": "server", "to": "floatingPi", "type": "action" }

after this message if the client can start the reverse ssh successfully it returns

{ "payload": "SSH Started Port 7005", "sender": "floatingPi", "to": "server", "type": "result" }

STOP { "payload": "{"parameters": "{\"name\": \"shell connection\"}", "action_type": "SSH", "command": "SSH-Stop"}", "sender": "server", "to": "floatingPi", "type": "action" }

result

{ "payload": "SSH Stopped name shell connection", "sender": "floatingPi", "to": "server", "type": "result" }