What if you are new to a network, and want to look smart?
One way to do that is to know the network before someone tells you. It is also good to know if there are rouge servers out there that should have the port shut off.
I like to use nmap to do this. According to the man, nmap is:
Network exploration tool and security / port scanner
Without fluff, here are the steps:
- Determine your IP range. Are you in a 192.x.x.x or 10.100.x.x?
- either use command line, or download the gui if your are in windows.
- run this: nmap 10.100.0-255.0-255 -p 3306
What you’ll end up with is a long list of IPs it checked, along with those with open 3306 (default mysql).