* [LARTC] A basic setup question
@ 2002-01-19 22:49 Ali badilli
2002-01-20 2:17 ` Greg Scott
2002-01-20 13:06 ` Stef Coene
0 siblings, 2 replies; 3+ messages in thread
From: Ali badilli @ 2002-01-19 22:49 UTC (permalink / raw)
To: lartc
Hi,
I have just started to build a small linux network. I
have the following question. If anybody helps I will
be really appreciated.
I have installed linux 7.2 in machine A, B, C and
connected them as follows.
A-----------C----------B
eth0 eth0 eth1 eth0
As it is shown in figure C has two ethernet interfaces
eth0 connected to A and eth1 connected to B.
I have assigned the addresses as follows:
A: 192.20.1.3 (eth0) mask:255.255.255.0 default
gw:192.20.1.1
B: 192.20.2.3 (eth0) mask:255.255.255.0 default
gw:192.20.2.1
C: 192.20.1.1 (eth0) mask:255.255.255.0
default gw:192.20.2.1
and 192.20.2.1 (eth1) mask:255.255.255.0
default gw:192.20.1.1
C acts as gateway between between A and B.
I configure routing table as follows:
A: destination network network mask gateway
0.0.0.0 0.0.0.0 92.20.1.1
192.20.1.0 255.255.255.0 192.20.1.3
B:destination network network mask gateway
0.0.0.0 0.0.0.0 92.20.2.1
192.20.2.0 255.255.255.0 192.20.2.3
C:destination network network mask gateway
192.20.2.0 255.255.255.0 192.20.2.1
(eth0)
192.20.1.0 255.255.255.0 192.20.1.1
(eth1)
I can ping from A to 192.20.2.1 but I cannot ping to
192.20.2.3(which is B)
similarly,
I can ping from B to 192.20.1.1 but cannot ping to
192.20.1.3 (which is A).
In other word, Both A and B can ping the interfaces of
C which belong to different subnets, but A and B
cannot ping each other.
Am I missing some basic configuration things?, Should
I install any other patch or etc?,
I will be really appreciated If some body give me
clear explanation. Sorry for asking a simple question.
Haci
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^ permalink raw reply [flat|nested] 3+ messages in thread* RE: [LARTC] A basic setup question
2002-01-19 22:49 [LARTC] A basic setup question Ali badilli
@ 2002-01-20 2:17 ` Greg Scott
2002-01-20 13:06 ` Stef Coene
1 sibling, 0 replies; 3+ messages in thread
From: Greg Scott @ 2002-01-20 2:17 UTC (permalink / raw)
To: lartc
Make sure you are doing this on machine C:
echo "Turning on IP forwarding"
echo "1" > /proc/sys/net/ipv4/ip_forward
That turns on the routing code on machine C.
- Greg Scott
-----Original Message-----
From: Ali badilli [mailto:hasanoglu69@yahoo.com]
Sent: Saturday, January 19, 2002 4:50 PM
To: lartc@mailman.ds9a.nl
Subject: [LARTC] A basic setup question
Hi,
I have just started to build a small linux network. I
have the following question. If anybody helps I will
be really appreciated.
I have installed linux 7.2 in machine A, B, C and
connected them as follows.
A-----------C----------B
eth0 eth0 eth1 eth0
As it is shown in figure C has two ethernet interfaces
eth0 connected to A and eth1 connected to B.
I have assigned the addresses as follows:
A: 192.20.1.3 (eth0) mask:255.255.255.0 default
gw:192.20.1.1
B: 192.20.2.3 (eth0) mask:255.255.255.0 default
gw:192.20.2.1
C: 192.20.1.1 (eth0) mask:255.255.255.0
default gw:192.20.2.1
and 192.20.2.1 (eth1) mask:255.255.255.0
default gw:192.20.1.1
C acts as gateway between between A and B.
I configure routing table as follows:
A: destination network network mask gateway
0.0.0.0 0.0.0.0 92.20.1.1
192.20.1.0 255.255.255.0 192.20.1.3
B:destination network network mask gateway
0.0.0.0 0.0.0.0 92.20.2.1
192.20.2.0 255.255.255.0 192.20.2.3
C:destination network network mask gateway
192.20.2.0 255.255.255.0 192.20.2.1
(eth0)
192.20.1.0 255.255.255.0 192.20.1.1
(eth1)
I can ping from A to 192.20.2.1 but I cannot ping to
192.20.2.3(which is B)
similarly,
I can ping from B to 192.20.1.1 but cannot ping to
192.20.1.3 (which is A).
In other word, Both A and B can ping the interfaces of
C which belong to different subnets, but A and B
cannot ping each other.
Am I missing some basic configuration things?, Should
I install any other patch or etc?,
I will be really appreciated If some body give me
clear explanation. Sorry for asking a simple question.
Haci
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [LARTC] A basic setup question
2002-01-19 22:49 [LARTC] A basic setup question Ali badilli
2002-01-20 2:17 ` Greg Scott
@ 2002-01-20 13:06 ` Stef Coene
1 sibling, 0 replies; 3+ messages in thread
From: Stef Coene @ 2002-01-20 13:06 UTC (permalink / raw)
To: lartc
Did you enaled ip-forwarding on machine C ?
echo "1" > /proc/sys/net/ipv4/ip_forward
Stef
On Saturday 19 January 2002 23:49, Ali badilli wrote:
> Hi,
>
> I have just started to build a small linux network. I
> have the following question. If anybody helps I will
> be really appreciated.
>
> I have installed linux 7.2 in machine A, B, C and
> connected them as follows.
>
> A-----------C----------B
> eth0 eth0 eth1 eth0
>
> As it is shown in figure C has two ethernet interfaces
> eth0 connected to A and eth1 connected to B.
>
> I have assigned the addresses as follows:
>
> A: 192.20.1.3 (eth0) mask:255.255.255.0 default
> gw:192.20.1.1
>
> B: 192.20.2.3 (eth0) mask:255.255.255.0 default
> gw:192.20.2.1
>
> C: 192.20.1.1 (eth0) mask:255.255.255.0
> default gw:192.20.2.1
>
> and 192.20.2.1 (eth1) mask:255.255.255.0
> default gw:192.20.1.1
>
> C acts as gateway between between A and B.
>
>
> I configure routing table as follows:
>
>
> A: destination network network mask gateway
> 0.0.0.0 0.0.0.0 92.20.1.1
>
> 192.20.1.0 255.255.255.0 192.20.1.3
>
>
> B:destination network network mask gateway
> 0.0.0.0 0.0.0.0 92.20.2.1
>
> 192.20.2.0 255.255.255.0 192.20.2.3
>
> C:destination network network mask gateway
> 192.20.2.0 255.255.255.0 192.20.2.1
> (eth0)
> 192.20.1.0 255.255.255.0 192.20.1.1
> (eth1)
>
> I can ping from A to 192.20.2.1 but I cannot ping to
> 192.20.2.3(which is B)
>
> similarly,
>
> I can ping from B to 192.20.1.1 but cannot ping to
> 192.20.1.3 (which is A).
>
> In other word, Both A and B can ping the interfaces of
> C which belong to different subnets, but A and B
> cannot ping each other.
>
> Am I missing some basic configuration things?, Should
> I install any other patch or etc?,
>
> I will be really appreciated If some body give me
> clear explanation. Sorry for asking a simple question.
>
> Haci
>
>
>
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>
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>
>
> __________________________________________________
> Do You Yahoo!?
> Send FREE video emails in Yahoo! Mail!
> http://promo.yahoo.com/videomail/
> _______________________________________________
> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://ds9a.nl/lartc/
--
stef.coene@docum.org
More QOS info : http://www.docum.org/
Title : "Using Linux as bandwidth manager"
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2002-01-19 22:49 [LARTC] A basic setup question Ali badilli
2002-01-20 2:17 ` Greg Scott
2002-01-20 13:06 ` Stef Coene
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