On Tue, Jun 05, 2007 at 07:00:31PM +0200, Elvir Kuric wrote:
> Hi all, I realised that I did not ask question on right way in my
> last mail to this list. I am trying to find out some tool or whatever
> else to open in input and output chain only ports I need, I mean to
> control which ports are open.
> In other words to have evidence which ports are open and why. Maybe
> this is funny for more experience users, but I asked this question
> here because I thought that iptables can help / and maybe can, but I
> do not know that :).
Netfilter can help you here, but if I wanted to learn, I'd use tcpdump
and/or wireshark. An "ACCEPT and log" rule in iptables might help as
well.
Generally, the port from which a connection originates does only
matter in exceptional cases.
Greetings
Marc
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