[LARTC] Making packets be reflected in a router

[LARTC] Making packets be reflected in a router

[BALU Frédéric]

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Hello,

 I use a debian 2.2 server, with 2 ethernet cards.

 For a course, I need to make packets from 192.168.1.0/24 to 192.168.2.0/24
go through eth0:0(192.168.1.254), another internal IP, again another
internal then out to 192.168.2.0/24 by eth1:0 (192.168.2.254/0).

 Any idea on how to do this (I know this is NOT the mechanism a router may
apply ...).

Regards,
-- 
M. BALU Frederic.





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[LARTC] Making packets be reflected in a router

[BALU Frédéric]

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Hello, 

 I use a debian 2.2 server, with 2 ethernet cards. 

 For a course, I need to make packets from 192.168.1.0/24 to 192.168.2.0/24
go through eth0:0(192.168.1.254), another internal IP, again another
internal then out to 192.168.2.0/24 by eth1:0 (192.168.2.254/0).

 Any idea on how to do this (I know this is NOT the mechanism a router may
apply ...). 

Regards, 
-- 
M. BALU Frederic. 

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Re:[LARTC] Making packets be reflected in a router

[BALU Frédéric]

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Hello, 

 I use a debian 2.2 server, with 2 ethernet cards. 

 For a course, I need to make packets from 192.168.1.0/24 to 192.168.2.0/24
go through eth0:0(192.168.1.254), another internal IP, again another
internal then out to 192.168.2.0/24 by eth1:0 (192.168.2.254/0).

 Any idea on how to do this (I know this is NOT the mechanism a router may
apply ...). 

Regards, 
-- 
M. BALU Frederic. 


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Re:[LARTC] Making packets be reflected in a router

[BALU Frédéric]

[-- Attachment #1: Type: text/plain, Size: 396 bytes --]

Hello, 

 I use a debian 2.2 server, with 2 ethernet cards. 

 For a course, I need to make packets from 192.168.1.0/24 to 192.168.2.0/24
go through eth0:0(192.168.1.254), another internal IP, again another
internal then out to 192.168.2.0/24 by eth1:0 (192.168.2.254/0).

 Any idea on how to do this (I know this is NOT the mechanism a router may
apply ...). 

Regards, 
-- 
M. BALU Frederic. 


[-- Attachment #2: Type: text/html, Size: 929 bytes --]

[LARTC] Making packets be reflected in a router

[BALU Frédéric]

[-- Attachment #1: Type: text/plain, Size: 395 bytes --]

Hello, 

 I use a debian 2.2 server, with 2 ethernet cards. 

 For a course, I need to make packets from 192.168.1.0/24 to 192.168.2.0/24
go through eth0:0(192.168.1.254), another internal IP, again another
internal then out to 192.168.2.0/24 by eth1:0 (192.168.2.254/0).

 Any idea on how to do this (I know this is NOT the mechanism a router may
apply ...). 

Regards, 
-- 
M. BALU Frederic. 

[-- Attachment #2: Type: text/html, Size: 920 bytes --]

[LARTC] Making packets be reflected in a router

[BALU Frédéric]

[-- Attachment #1: Type: text/plain, Size: 576 bytes --]

Hello, 

 I use a debian 2.2 server, with 2 ethernet cards. 

 For a course, I need to make packets from 192.168.1.0/24 to 192.168.2.0/24
go through eth0:0(192.168.1.254), another internal IP, again another
internal then out to 192.168.2.0/24 by eth1:0 (192.168.2.254/0).

 Any idea on how to do this (I know this is NOT the mechanism a router may
apply ...) ?

eth0   : 192.168.1.1
eth0:0 : 192.168.1.254
eth0:1 : 192.168.3.254
eth0:2 : 192.168.5.254
eth1   : 192.168.2.1
eth1:0 : 192.168.2.254
eth1:1 : 192.168.3.254
eth1:2 : 192.168.5.254

Regards, 
-- 
M. BALU Frederic. 

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Re: [LARTC] Making packets be reflected in a router

[Giannis Stoilis]

----- Original Message ----- 
From: "BALU Frédéric" <frederic.balu@cegetel.fr>
To: <lartc@mailman.ds9a.nl>
Sent: ÐÝìðôç, 19 Éïõíßïõ 2003 10:20 ðì
Subject: [LARTC] Making packets be reflected in a router


> Hello,
>
>  I use a debian 2.2 server, with 2 ethernet cards.
>
>  For a course, I need to make packets from 192.168.1.0/24 to
192.168.2.0/24
> go through eth0:0(192.168.1.254), another internal IP, again another
> internal then out to 192.168.2.0/24 by eth1:0 (192.168.2.254/0).
>
>  Any idea on how to do this (I know this is NOT the mechanism a router may
> apply ...) ?
>
> eth0   : 192.168.1.1
> eth0:0 : 192.168.1.254
> eth0:1 : 192.168.3.254
> eth0:2 : 192.168.5.254
> eth1   : 192.168.2.1
> eth1:0 : 192.168.2.254
> eth1:1 : 192.168.3.254
> eth1:2 : 192.168.5.254

How many times are you going to send this e-mail, until you realize that
people in here don't know the answer? Anyways...
What you are trying to do, is somewhat impossible.
You CANNOT route traffic inside a linux box, between aliased interfaces. You
could, using some old kernels, but this feature was removed from the kernel
long ago. I remember seeing a patch somewhere but, if I remember correctly,
it us outdated.
Besides, when a subnet is connected directly on an interface, it is
automatically using a metric of 0, which automatically overrides any routing
command you may give. Any routing command uses the metric of 1 and above.
I wonder what EXACTLY were you supposed to do for the course, to imagine the
configuration you mentioned. I am curious...

- Giannis Stoilis

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