I can't get nc to do anything worthwhile. In fact I can't even get the examples in the manpage to work. From either my C6 servers or my F17 notebooks. For example: echo -n "GET / HTTP/1.0\r\n\r\n" | nc medon.htt-consult.com 80 Gets no response. And looking into the access.log of medon shows no access by my client. I have tried the client/server on both -4 and -6 on a port I have enabled on my firewall. The server looks to be listening, but the client seems to never connect. what I typed in eventually gets played to the terminal session and of course bash says no such command. Say I have port 5902 open (for vncserver, and vncserver is not running). So on server foo, in a su session (because of the port range) I type: nc -4l 5902 seems to be listening. Then on bar, also in an su session: nc -4 foo.domain 5902 hello world After some time nc terminates and "hello world" gets sent to the su session and of course is not a valid command... So what am I missing here? Doesn't matter if I use -4, -6, or neither. It does not work.