Netcat

https://www.thegeekstuff.com/2012/04/nc-command-examples/?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%253A+TheGeekStuff+(The+Geek+Stuff)

$ nc -zv dikapedia.com 443
Ncat: Version 7.50 ( https://nmap.org/ncat )
Ncat: Connected to 23.20.238.64:443.
Ncat: 0 bytes sent, 0 bytes received in 0.03 seconds.

To start a listening Netcat process:

nc -l -p 1500