Ubuntu Servers :: Why Can't Get Netcat To Work Even On Localhost

OK here's what I'm doing:

On terminal 1, I enter:

$ nc6 -vlp 5000
nc6: listening on 0.0.0.0 5000 ...

On terminal 2, I enter:

$ nc6 -v localhost 5000
nc6: ygt-asfandq (127.0.0.1) 5000 [5000] open

Now, as SOON as I make the connection on terminal 2, both netcats immediately quit back to the command prompt. The return code for both is 0.

I do not have ANYTHING in my firewall (I checked with sudo iptables -v -L)

I have attached a wireshark trace of the conversation..