[CentOS] nc not working as advertised

On 03/07/2013 06:30 PM, Keith Keller wrote:
> On 2013-03-07, Robert Moskowitz <rgm at htt-consult.com> wrote:
>> On 03/07/2013 05:06 PM, Paul Heinlein wrote:
>>> On Thu, 7 Mar 2013, Robert Moskowitz wrote:
>>>
>>>> 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
>>> You mean
>>>
>>>    echo -ne "GET ..."
>>>
>>> right?
>> No.  I did a simple copy from the manpage.  check it out yourself. :(
> The man page may be incorrect.  You need -e in order to get echo to
> print out the line feeds properly:

I did try with "echo -ne" and that worked.  the man page IS incorrect.  
Guess I have to submit a bug report.

> Did you also try the client/server example in the man page (which looks
> correct to me)?

The localhost loopback works.

Ah, I just figured out my between systems problem.  I was testing across 
subnets, and the port I was using is not allowed over ipv6, I only have 
an ipv4 rule for it.  gumble.  Corollary #2 of Murphy's Law:  "It is 
always something."

Now back to it.  I think I figured out my HIP testing problems; it has 
to do with the HIPFW options...  Always firewalls, it seems.