Nmap basic challenge

I’m stuck on question 5, I’ve tried the commands in the guide but none of them show me the service version, it only shows me “?”, I saw in another forum that I would use “-A” inside the command, but it hasn’t worked for me either, this was the last command I used:
sudo nmap -Pn 172.16.0.16 -A -T5 -p 12345 -A

Can someone help me, please? I’m in desperation.

Hello there, I do not have your answer however since you made it further than me would you mind help me out and explain or tell me how did you discover the hidden host? so far I’ve tryied sudo nmap -Pn 172.16.0.32 -T5

Hi friend, I used this command:
sudo nmap -Pn 172.16.0.1-100 -F, the command is used to perform a network scan on the IP address range from 172.16.0.1 to 172.16.0.100 without sending any ICMP probes (ping).

  • -Pn: Disables host discovery and prevents Nmap from sending ICMP probes (ping) to determine if the host is up or not. This option is useful when ICMP is blocked or when you want to scan hosts that do not respond to ICMP.

In the output, you will see an IP with a special name, this is how I determined that this was the target.

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did you ever figure this out?