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List:       loadbalancing-l
Subject:    RE: [load balancing] Servers behind the CSS needs to access other	 net
From:       renatoho () serasa ! com ! br
Date:       2004-07-27 10:57:08
Message-ID: OF2671FE76.7F7DA49F-ON03256EDE.003ADD15-83256EDE.003C2875 () serasa ! com ! br
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Peter,

I´m trying to understand how can I directly connect
serv1/serv2 with serv3. Because I can´t to do tests.
What source IP addr will be coming to FW?
The IP addr of serv1/serv2 or virtual IP addr of CSS?

thanks,
Renato H. de Oliveira
Célula Conectividade
Serasa S/A.
+ renatoho@serasa.com.br
1 http://www.serasa.com.br
( (+55 11) 6847-8471







PeterJ.Monaghan@ccra-adrc.gc.ca
Enviado Por: owner-lb-l@vegan.net

RAMAL:
26/07/2004 17:35
Favor responder a lb-l


        Para:   "'lb-l@vegan.net'" <lb-l@vegan.net>
        cc:
        Assunto:        RE: [load balancing] Servers behind the CSS needs
        to access other net
behind the FW.


Are you trying to load balance from the CSS to serv3, or directly connect
from serv1/2 to serv3.  If you are try to load balance, then the firewall
should see the VIP, otherwise it will see the serv1/serv2 IP.  If you dump
the config and routing table, may be able to help some more.

Peter M.

-----Original Message-----
From: renatoho@serasa.com.br [mailto:renatoho@serasa.com.br]
Sent: July 26, 2004 3:08 PM
To: lb-l@vegan.net
Subject: [load balancing] Servers behind the CSS needs to access other
net behind the FW.
Importance: High


Hi, folks!

Someone could help me?

First look that picture! The load balance when serv3 needs to connect
with serv1 or serv2 works well.

But...When the server 1 or server 2 needs to access the sever 3 on net
172.17.0.0,
and the Firewall does the nat of destination IP addr,
(1)what happen when serv1 or serv2 try to connect with serv3? How this
works?

(2)What source IP addr will arrive to FW? The IP addr of serv1/serv2 or
   virtual IP addr of CSS?

(3)What the common configuration of net is used to resolve this situation?

(4)It´s necesseraly to change anything on cfg of CSS to this work?


   -----+-----------------+--------- net 172.17.0.0
        |                 |
        |                 |
        |1                |
     +--+--+           +--+--+
     |     |        ^  |     |  |
     |     |        |  | FW  |  | NAT
     |serv3|    NAT |  |     |  |
     |     |        |  |     |  V
     +-----+           +--+--+
                          |1
                          |
                          |
               -----+-----+--------- net 10.1.1.0
                    |
                    |
                    |2
               +----+----+
               |         |
               |   CSS   |
               +----+----+
                    |
                    |
          ----+-----+------+-------- net 10.2.2.0
              |            |
              | 1          |2
           +--+--+      +--+--+
         ^ |     |      |     |
         | |serv1|      |serv2|
         | |     |      |     |
           |     |      |     |
           +-----+      +-----+


Thanks a lot in advance,
Renato H. de Oliveira
Célula Conectividade
Serasa S/A.
+ renatoho@serasa.com.br
1 http://www.serasa.com.br
( (11) 6847-8471



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