I want to know how people test if their network connection is secured. So, if I use ssh, I am told that it is secured. But I want to verify this, so I tried to use tcpdump. Below is the command that I used.
tcpdump port 22 -X
then I get the raw packets which I have no knowledge to interpret. Also, I am not sure if this approach is even correct.
Another exercise of this problem is by using telnet. So, I know it is not secure. But when I try to do the following command:
telnet <IP address> 3306 tcpdump port 3306 -X
The tcpdump output looks cryptic to me as well.
Any suggestions / comments?