A security analyst noticed a colleague typing the following command: `Telnet some-host 443' Which of the following was the colleague performing?

The correct answer is B. A quick test to see if there is a service running on some-host TCP/443, which is being routed correctly. Using Telnet to connect to a specific port (in this case TCP/443) is a common, legitimate technique for quickly testing whether a service is listening and reachable on that port. If the connection succeeds, it confirms the port is open and the service is running. Port 443 is the

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Question

A security analyst noticed a colleague typing the following command:

`Telnet some-host 443' Which of the following was the colleague performing?

Options

AA hacking attempt to the some-host web server with the purpose of achieving a distributed denial
BA quick test to see if there is a service running on some-host TCP/443, which is being routed correctly
CTrying to establish an insecure remote management session. The colleague should be using SSH or
DA mistaken port being entered because telnet servers typically do not listen on port 443.

How the community answered

(29 responses)

A
7% (2)
B
83% (24)
C
10% (3)

Explanation

Using Telnet to connect to a specific port (in this case TCP/443) is a common, legitimate technique for quickly testing whether a service is listening and reachable on that port. If the connection succeeds, it confirms the port is open and the service is running. Port 443 is the standard HTTPS port. This is a basic network troubleshooting method-it is not an attack, not necessarily a mistake, and not an attempt at remote management (Telnet on a non-standard port like 443 is being used purely as a connectivity probe, not as a remote shell).

Topics

#port testing#network diagnostics#telnet#service discovery

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