On 24/02/14 15:44, Peter Easthope wrote:
> References: <a7f1e371d326618f1b4877e7b9e45483.squir...@easthope.ca>
> <530a9882.4040...@gmail.com>
> 
> From: Scott Ferguson <scott.ferguson.debian.u...@gmail.com>
> Date: Mon, 24 Feb 2014 11:55:30 +1100
>> NOTE: there four different "netcats" available in Wheezy.
> 
> I found three.
> netcat-openbsd, netcat-traditional, netcat6.

OK. I miscounted transitional as a separate package.

> 
> netcat-openbsd pleads ignorance.
> peter@dalton:~$ nc -l 25 -e ssmtp
> nc: invalid option -- 'e'
>   ...
> 
> netcat-traditional listens on the port; or appears to and does nothing.
> peter@dalton:~$ nc -l 25 -e ssmtp
> [gears humming]

What are the contents of the file "ssmtp"?

> 
> netcat6 refuses.
> peter@dalton:~$ nc -l -p 25 -e ssmtp

"-p 25" is not the same as "-l 25"

> nc: bind to source :: 25 failed: Permission denied
> nc: bind to source 0.0.0.0 25 failed: Permission denied
> nc: failed to bind to any local addr/port

$ nc -lvv -p 1025 -w 2;nc -lvv -p 25
listening on [any] 1025 ...
no connection : Connection timed out
Can't grab 0.0.0.0:25 with bind : Permission denied

(netcat-traditional   1.10-40)



Kind regards

<snipped>


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