Day-4 Internship

Task 4: Setup and Use a Firewall on Linux (Using UFW)

1. Opened Terminal and Checked UFW Status

sudo ufw status verbose

2. Added a Rule to Block Port 23 (Telnet)

sudo ufw deny 23

• This blocked inbound connections on port 23.

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3. Tested the Block Rule

telnet localhost 23

• The connection was refused, confirming the firewall was working as intended.

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4. Removed the Block Rule to Restore Original State

sudo ufw delete deny 23

• Cleaned up the test rule.

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5. Verified Firewall Rules for Deliverable

sudo ufw status numbered

• Took a screenshot of this output as required.

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