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$ telnet 10.71.17.143 5432
Trying 10.71.17.143...
^C
MacBook-Pro:~ aleksander$ nmap -p5432 10.71.17.143
Starting Nmap 7.92 ( https://nmap.org ) at 2021-08-19 18:34 EEST
Nmap scan report for 10.71.17.143
Host is up (0.099s latency).
PORT STATE SERVICE
5432/tcp filtered postgresql
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$ telnet localhost 5432
Trying ::1...
Connected to localhost.
Escape character is '^]'.
^CConnection closed by foreign host.
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