[SOLVED] want to open my ports to play with netcat

[inlogger]

I type

[nielchiano]

a TCP port can be in 3 states:

• non-existant, sometimes called "stealth": everything you send to it disappears
  
• closed: when you try to open a connection, he refuses (ie, sends a reset packet back)
  
• open
  

if you get connection refused, it's most likely just that, "closed", and probably not firewalled, since firewalls usualy do "stealth".

Maybe something: regular users aren't allowed to listen on ports < 1024; so you should try something higher.
you can also check

[inlogger]

I figured out why netcat wasn't working. I was typing "nc -l 75" when I should have been typing "nc -l -p 75" with a "-p" to specify what port to listen to (and open).

Don't know what it was making of my "nc -l 75" commands.