ADSM-L

Re: linux client setup through firewall - what source port?

2004-09-13 09:35:02
Subject: Re: linux client setup through firewall - what source port?
From: "T. Lists" <tracylists AT YAHOO DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Mon, 13 Sep 2004 06:35:29 -0700
So, what you're telling me is as long as I've got port
1500 open, I should be ok?  The sending port is
irrelevant?

So what else could be my problem, 'cause it ain't
working.

Thanks,
T.
--- Stef Coene <stef.coene AT DOCUM DOT ORG> wrote:

> On Saturday 11 September 2004 21:50,
> showersofblessings wrote:
> > Stef,
> >
> > Note: this is a personal view.
> >
> > There are usually two ports involved in a TCP
> > communication: the listening and the talking port.
> > What is usually defined during a TCP dependent
> > software configuration is the listening port which
> has
> > to be static,
> !! this is the listening port on the TSM server so
> it's the destination port
> of the tcp connection
>
> > while the talking port is randomly
> > generated by the system.
> > And since the value of your schedmod is "polling",
> > port 32850 might be the one your client was using
> to
> > try poll the server and it timed out because the
> > server didn't response back.
> Yes and no.  The clients polls, so the client
> initiate the connection on port
> 1500 TO the TSM server and uses a high random port
> to do this.  So port 1500
> TO the TSM server has to be opened on the firewall.
> The other port, 32850,
> is not important because no connection is initiated
> to this port, it is part
> of an establisched connection.
> When a firewall sees a session to a port, it also
> knows the port on the client
> and all packets in the session will be allowed.
>
>
> Stef
>
> --
> stef.coene AT docum DOT org
>  "Using Linux as bandwidth manager"
>      http://www.docum.org/
>




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