SSH tunneling (port forwarding) in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to create a local SSH tunnel forwarding port 8080.

Linux CLI

ssh -L [1] user@remote_host

Drag options to blanks, or click blank then click option'

A-N

B8080:localhost:80

C-R 8080:localhost:80

D-p 22

Attempts:

3 left

💡 Hint

Common Mistakes

Using -R instead of -L for local forwarding.

Forgetting to specify the port mapping format.

The -L option specifies local port forwarding in the format local_port:host:host_port.

2fill in blank

medium

Complete the command to create a remote SSH tunnel forwarding remote port 9090 to local port 3000.

Linux CLI

ssh [1] 9090:localhost:3000 user@remote_host

Drag options to blanks, or click blank then click option'

A-R

B-L

C-N

D-p

Attempts:

3 left

💡 Hint

Common Mistakes

Using -L instead of -R for remote forwarding.

Mixing up local and remote ports.

The -R option specifies remote port forwarding in the format remote_port:host:host_port.

3fill in blank

hard

Fix the error in the SSH command to forward local port 5000 to remote port 80.

Linux CLI

ssh -L 5000:localhost:[1] user@remote_host

Drag options to blanks, or click blank then click option'

A80

B22

C443

D8080

Attempts:

3 left

💡 Hint

Common Mistakes

Using SSH port 22 instead of the service port.

Using an unrelated port number.

Port 80 is the standard HTTP port, commonly forwarded for web services.

4fill in blank

hard

Fill both blanks to create a command that forwards local port 3306 to remote MySQL port 3306 and runs without opening a shell.

Linux CLI

ssh [1] [2] user@remote_host

Drag options to blanks, or click blank then click option'

A-L 3306:localhost:3306

B-N

C-p 22

D-R 3306:localhost:3306

Attempts:

3 left

💡 Hint

Common Mistakes

Using -R instead of -L for local forwarding.

Forgetting -N to keep the session quiet.

Use -L for local forwarding and -N to prevent opening a remote shell.

5fill in blank

hard

Fill all three blanks to create a command that forwards remote port 5432 to local port 5432, uses port 2222 for SSH, and runs without executing remote commands.

Linux CLI

ssh [1] [2] [3] user@remote_host

Drag options to blanks, or click blank then click option'

A-R 5432:localhost:5432

B-p 2222

C-N

D-L 5432:localhost:5432

Attempts:

3 left

💡 Hint

Common Mistakes

Using -L instead of -R for remote forwarding.

Omitting the SSH port option.

Not using -N to prevent remote shell.

Use -R for remote forwarding, -p to specify SSH port, and -N to avoid remote shell.