listening to a specific port in real-time

Hi,

I need to find a way to listen to a port in real-time on linux. Is
there such a way/tool to do this?


Thanks,
-Seung



schoi21c@gmail.com

On 17 Apr 2007 17:59:12 -0700, (E-Mail Removed)
<(E-Mail Removed)> wrote:
>
>
> Hi,
>
> I need to find a way to listen to a port in real-time on linux. Is
> there such a way/tool to do this?
>
nc -l -p port


--
Be security conscious -- National defense is at stake.

That command fails when I try it with port #22, i.e. ssh port with
bind, since sshd is already bound to that port. Is there a way to get
around this problem? Does 'nc' only work with unbound port?


Thanks,
-Seung




On Apr 17, 10:59 pm, Bill Marcum <marcumb...@bellsouth.net> wrote:
> On 17 Apr 2007 17:59:12 -0700, schoi...@gmail.com <schoi...@gmail.com> wrote:
>
> > Hi,
>
> > I need to find a way to listen to a port in real-time on linux. Is
> > there such a way/tool to do this?
>
> nc -l -p port
>
> --
> Be security conscious -- National defense is at stake.

(E-Mail Removed) wrote:

> That command fails when I try it with port #22, i.e. ssh port with
> bind, since sshd is already bound to that port. Is there a way to get
> around this problem? Does 'nc' only work with unbound port?
>
>

Oh - I presume you want to snoop packets then?

In which case, use tcpdump or etherreal.

eg:

tcpdump -v -s65535 -X -i eth0 port 22

"man tcpdump" displays the full potential, which is vast.

Cheers

Tim