Using the Chisel command (with examples)
1: Run a Chisel server
Code:
chisel server
Motivation:
Running a Chisel server allows you to create TCP tunnels that can be used to access resources on a remote network. It is useful for situations where you need to securely access a private network from a different location.
Explanation:
By running the chisel server command, you start a Chisel server that listens on the default port 8080. This server will be able to accept incoming connections and create tunnels.
Example Output:
2021/10/01 15:30:12 listening on :8080...
2: Run a Chisel server listening to a specific port
Code:
chisel server -p <server_port>
Motivation:
In some cases, you may need to run the Chisel server on a different port than the default one. This can be useful when the default port is already in use or when you want to use a specific port for organizational purposes.
Explanation:
By specifying the -p flag followed by the desired port number, you can run the Chisel server on a specific port. This allows you to have more control over the server’s configuration and avoid conflicts with other services running on the same machine.
Example Output:
2021/10/01 15:35:28 listening on :8888...
3: Run a Chisel server that accepts authenticated connections using username and password
Code:
chisel server --auth <username>:<password>
Motivation:
Adding authentication to the Chisel server provides an extra layer of security by ensuring that only authorized clients can establish tunnels. This is particularly useful when you want to restrict access to sensitive resources on your network.
Explanation:
By using the --auth flag followed by a username and password separated by a colon, you enable authentication for the Chisel server. Any client connecting to this server will be required to provide the correct credentials in order to establish a tunnel.
Example Output:
2021/10/01 15:40:59 listening on :8080...
2021/10/01 15:40:59 authenticating tunnel...
4: Connect to a Chisel server and tunnel a specific port to a remote server and port
Code:
chisel client <server_ip>:<server_port> <local_port>:<remote_server>:<remote_port>
Motivation:
Using the Chisel client, you can establish a connection to a Chisel server and create a tunnel for a specific port. This allows you to securely access services running on a remote server as if they were running locally.
Explanation:
The chisel client command requires the IP address and port of the Chisel server as the first argument, followed by the local port that will be forwarded to the remote server and its port. This creates a tunnel that enables communication between the local port and the remote server’s port.
Example Output:
2021/10/01 15:45:42 client: Connecting to ws://<server_ip>:<server_port>...
2021/10/01 15:45:43 client: Tunnel established: <local_port> <-> <remote_server>:<remote_port>
5: Connect to a Chisel server and tunnel a specific host and port to a remote server and port
Code:
chisel client <server_ip>:<server_port> <local_host>:<local_port>:<remote_server>:<remote_port>
Motivation:
In some cases, you may need to tunnel a specific host rather than just a port. This is useful when you want to access a specific service running on a remote server that is bound to a specific IP address.
Explanation:
By specifying the local host along with the local port in the chisel client command, you can create a tunnel that forwards traffic originating from that specific host and port to the remote server and its port. This enables you to access services that are bound to a specific IP address on the remote server.
Example Output:
2021/10/01 15:51:24 client: Connecting to ws://<server_ip>:<server_port>...
2021/10/01 15:51:25 client: Tunnel established: <local_host>:<local_port> <-> <remote_server>:<remote_port>
6: Connect to a Chisel server using username and password authentication
Code:
chisel client --auth <username>:<password> <server_ip>:<server_port> <local_port>:<remote_server>:<remote_port>
Motivation:
When the Chisel server requires authentication, the client needs to provide the correct credentials to establish a tunnel. This is useful when you want to ensure that only authorized clients can access the resources on the remote network.
Explanation:
By including the --auth flag followed by the username and password in the chisel client command, you enable authentication for the client connection. The client must provide the correct credentials in order to establish the tunnel with the Chisel server.
Example Output:
2021/10/01 15:56:58 client: Connecting to ws://<server_ip>:<server_port>...
2021/10/01 15:57:00 client: Tunnel established: <local_port> <-> <remote_server>:<remote_port>
By using the Chisel command with the provided examples, you can create TCP tunnels securely and allow access to resources on remote networks. Whether you need to run a Chisel server, specify authentication, or establish tunnels for specific ports or hosts, Chisel provides a versatile solution for securely accessing remote resources.
