Need urgent help on NAT/load sharing

Need urgent help on NAT/load sharing

[Saeed Zamani]

Hi all,
   I am new to list and have a basic nat question on Redhat Linux 9. I
have to translate my local IP ( 192.168.1.0/24 ) to two different public
IP given by two different ISP ( IPE1 & IPE2 ) at a specified rate. For
example for every 4 received packet, one have to translate to IPE1 and
other three to IPE2. I need this for load balacing the internet traffic
between two isp. At the end, it is excellent if there is an option that
If one the ISP gateway is dead, all packets have to translate to other
public IP. Please help me. 
Thanks, 
Saeed Zamani, 
Technical Manager, 
Concept FZ LLC. 

Re: Need urgent help on NAT/load sharing

[William Stearns]

Good morning, Saeed,

On Thu, 5 Feb 2004, Saeed Zamani wrote:

>    I am new to list and have a basic nat question on Redhat Linux 9. I
> have to translate my local IP ( 192.168.1.0/24 ) to two different public
> IP given by two different ISP ( IPE1 & IPE2 ) at a specified rate. For
> example for every 4 received packet, one have to translate to IPE1 and
> other three to IPE2. I need this for load balacing the internet traffic
> between two isp. At the end, it is excellent if there is an option that
> If one the ISP gateway is dead, all packets have to translate to other
> public IP. Please help me. 

	I don't know the answer off the top of my head, but you might want 
to take a look at the Linux Advanced Routing and Traffic Control HOWTO at 
http://www.lartc.org/ .
	Cheers,
	- Bill

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Re: Need urgent help on NAT/load sharing

[Olexandr O. Galay]

Hello, Saeed!

Replying to your letter:

S> Hi all,
S>    I am new to list and have a basic nat question on Redhat Linux 9. I
S> have to translate my local IP ( 192.168.1.0/24 ) to two different public
S> IP given by two different ISP ( IPE1 & IPE2 ) at a specified rate. For
S> example for every 4 received packet, one have to translate to IPE1 and
S> other three to IPE2. I need this for load balacing the internet traffic
S> between two isp. At the end, it is excellent if there is an option that
S> If one the ISP gateway is dead, all packets have to translate to other
S> public IP. Please help me. 
S> Thanks, 
S> Saeed Zamani, 
S> Technical Manager, 
S> Concept FZ LLC. 
I think, you can balance when you are connecting to another ports
So, if you are connecting to port 80, you can NAT packets to IPE1, and
another packets to IPE2

iptables -t nat -A POSTROUTING -p tcp --dport 80 -j SNAT
--to-destination ipe1.ip.address
iptables -t nat -A POSTROUTING -j SNAT --to-destination
ipe2.ip.address



-- 
Best Regards, Saeed!

Friday, February 6, 2004, 9:49

Olexandr O. Galay
mailto:root@e-mail.te.ua
http://www.macros.org.ua
ICQ: 29292281

RE: Need urgent help on NAT/load sharing

[Marc Fargas]

The Linux Advanced Routing Howto makes a point on it, take a look at
www.lartc.org specifically:
http://lartc.org/howto/lartc.rpdb.multiple-links.html
You'll only have to change the weight on the lines. Also note that you can
onlky balance outgoing connections that way, not inbound ones.

Hope this helps you ;)



-----Mensaje original-----
De: netfilter-admin@lists.netfilter.org
[mailto:netfilter-admin@lists.netfilter.org] En nombre de Saeed Zamani
Enviado el: jueves, 05 de febrero de 2004 18:25
Para: netfilter@lists.netfilter.org
Asunto: Need urgent help on NAT/load sharing

Hi all,
   I am new to list and have a basic nat question on Redhat Linux 9. I
have to translate my local IP ( 192.168.1.0/24 ) to two different public
IP given by two different ISP ( IPE1 & IPE2 ) at a specified rate. For
example for every 4 received packet, one have to translate to IPE1 and
other three to IPE2. I need this for load balacing the internet traffic
between two isp. At the end, it is excellent if there is an option that
If one the ISP gateway is dead, all packets have to translate to other
public IP. Please help me. 
Thanks, 
Saeed Zamani, 
Technical Manager, 
Concept FZ LLC. 

Re: Need urgent help on NAT/load sharing

[Alexis]

you need iproute2 to use both providers links.



----- Original Message ----- 
From: "Saeed Zamani" <szamani@concept.ae>
To: <netfilter@lists.netfilter.org>
Sent: Thursday, February 05, 2004 2:24 PM
Subject: Need urgent help on NAT/load sharing


> Hi all,
>    I am new to list and have a basic nat question on Redhat Linux 9. I
> have to translate my local IP ( 192.168.1.0/24 ) to two different public
> IP given by two different ISP ( IPE1 & IPE2 ) at a specified rate. For
> example for every 4 received packet, one have to translate to IPE1 and
> other three to IPE2. I need this for load balacing the internet traffic
> between two isp. At the end, it is excellent if there is an option that
> If one the ISP gateway is dead, all packets have to translate to other
> public IP. Please help me. 
> Thanks, 
> Saeed Zamani, 
> Technical Manager, 
> Concept FZ LLC. 
> 
> 
> 
>