Closing a stuck port...

Matt Nelson matt at
Tue Jun 16 14:54:13 MDT 2009

On Tue, Jun 16, 2009 at 10:15 AM, Lonnie Olson <lists at> wrote:

> On Tue, Jun 16, 2009 at 9:47 AM, Matt Nelson<matt at> wrote:
> > We have a java app that has many ports open.  There is one port that is
> > stuck and we would like to not have to kill the process, but just
> close/kill
> > the port that it has open.  Anyone know how to do this?
> tcpkill just listens to network traffic based on the expression you
> pass it.  Any packets that match the expression cause a forged RST
> (reset) packet to be sent to the originator of the matched packet.
> Hence killing the TCP session.  This isn't an OS level close of a
> port, but a network level kill of a TCP session, it can even be run
> from a 3rd party machine.  This is probably not what you are looking
> for.
> --lonnie
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Ahh, that makes sense thanks lonnie for the clarification.

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