how the packet is traversed

how the packet is traversed

[Giuseppe Longo]

Hello,
i'm a student of computer science, working on a project using iptables.
I'm confused how the packet is treated when it's arrived in the iptables.

Someone can explain me this process?

Thanks in advice,
Regards.

Re: how the packet is traversed

[叶雨飞]

It's probably better that you search google first.

http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch14_:_Linux_Firewalls_Using_iptables

On Tue, Oct 2, 2012 at 1:20 PM, Giuseppe Longo <giuseppelng@gmail.com> wrote:
> Hello,
> i'm a student of computer science, working on a project using iptables.
> I'm confused how the packet is treated when it's arrived in the iptables.
>
> Someone can explain me this process?
>
> Thanks in advice,
> Regards.
> --
> To unsubscribe from this list: send the line "unsubscribe netfilter" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: how the packet is traversed

[Andrew Beverley]

On Tue, 2012-10-02 at 22:20 +0200, Giuseppe Longo wrote:
> Hello,
> i'm a student of computer science, working on a project using iptables.
> I'm confused how the packet is treated when it's arrived in the iptables.
> 
> Someone can explain me this process?

Well there are various tutorials, none of which I can find right now,
but a picture paints a thousand words...

This diagram is a good place to start as it's simple, although probably
out of date:

http://www.docum.org/docum.org/kptd/

Once you've got your head around that, this is the fully comprehensive
one, but tougher for beginners:

http://upload.wikimedia.org/wikipedia/commons/3/37/Netfilter-packet-flow.svg

If you've got any specific questions, then please ask!

Andy

Re: how the packet is traversed

[Marco Padovan]

http://inai.de/images/nf-packet-flow.png

Il 02/10/2012 22:20, Giuseppe Longo ha scritto:
> Hello,
> i'm a student of computer science, working on a project using iptables.
> I'm confused how the packet is treated when it's arrived in the iptables.
>
> Someone can explain me this process?
>
> Thanks in advice,
> Regards.
> --
> To unsubscribe from this list: send the line "unsubscribe netfilter" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: how the packet is traversed

[Neal Murphy]

On Tuesday, October 02, 2012 04:20:14 PM Giuseppe Longo wrote:
> Hello,
> i'm a student of computer science, working on a project using iptables.
> I'm confused how the packet is treated when it's arrived in the iptables.
> 
> Someone can explain me this process?

http://www.docum.org/docum.org/kptd/

Re: how the packet is traversed

[Vigneswaran R]

On Wednesday 03 October 2012 01:50 AM, Giuseppe Longo wrote:
> Hello,
> i'm a student of computer science, working on a project using iptables.
> I'm confused how the packet is treated when it's arrived in the iptables.
>
> Someone can explain me this process?

I found the following very useful to start with,

<http://adminsehow.internexsolution.netdna-cdn.com/wp-content/uploads/2011/09/iptables.png>


Regards,
Vignesh

>
> Thanks in advice,
> Regards.
> --
> To unsubscribe from this list: send the line "unsubscribe netfilter" in
> the body of a message to majordomo@vger.kernel.org
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>

Re: how the packet is traversed

[Csordás Csaba Ifj.]

Currently the best one is at http://inai.de/images/nf-packet-flow.svg
by Jan ENGELHARDT.
He is a netfilter developer.
http://www.ipszilon.iif.hu/iptables/tuzfal-kadlec.pdf
The other (simpler one) I would recommend:

Page 11 of http://www.ipszilon.iif.hu/iptables/tuzfal-kadlec.pdf.

It is in Hungarian.








On Tue, Oct 2, 2012 at 10:20 PM, Giuseppe Longo <giuseppelng@gmail.com> wrote:
> Hello,
> i'm a student of computer science, working on a project using iptables.
> I'm confused how the packet is treated when it's arrived in the iptables.
>
> Someone can explain me this process?
>
> Thanks in advice,
> Regards.
> --
> To unsubscribe from this list: send the line "unsubscribe netfilter" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html