Gateway between CIP and VIP on LVS-NAT.

To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: Gateway between CIP and VIP on LVS-NAT.
From: "Carlos J. Ramos" <cjramos@xxxxxxxxxx>
Date: Wed, 27 Feb 2002 19:39:41 +0100
Hi all, greets.

Please, we have a difficult problem, now I m loosed enough to continue.

We have this network with a cluster using LVS-NAT.

eth1  eth0   public IP       eth0   public IP
eth2  public IP          eth1     eth0:1
                         eth1:0    eth1
     |                       |                 |
RealServer1            RealServer2             Realserver3
eth0 eth0  eth0

On director:

# ipvsadm -nl

IP Virtual Server version 1.0.8 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port             Forward Weight ActiveConn InActConn
TCP wlc
  ->                 Masq    1      0          0
  ->                 Masq    1      0          0
  ->                 Masq    1      0          0
TCP  public IP:80 wlc
  ->                 Masq    1      0          0
  ->                 Masq    1      0          0
  ->                 Masq    1      0          0

I had read the LVS howto, and if i try to make a request directly from gateway to director, (all in the same network) i had to tunning it with this:

# echo 0 > /proc/sys/net/ipv4/conf/all/send_redirects
# echo 0 > /proc/sys/net/ipv4/conf/default/send_redirects
# echo 0 > /proc/sys/net/ipv4/conf/eth0/send_redirects

and delete routes to gateway on the RealServers to obtain response and of course: it works fine :)

But the problem is that a i had to make requests from a machine in a different network, outside the gateway (doctor). Doctor is able to ping, login through ssh... etc. into any machine into the cluster, included director through its VIP. But if i try to make requests from this machine, I can see, by using tcpdump, request coming to the realservers, but its unable to obtain response... :( any
# telnet 80
has no response :((

I had try applying the solution for CIP,VIP,RIPs in the same network, and without it (of course, removing and adding the routes into the realservers), but it wasnt able to works for me :((

Any help, howtos, url.. its welcome !!

Thanks a lot in advance.

Carlos J. Ramos                 Genasys II Spain, S.A.U.
Administrador de Sistemas       Ventura de la Vega 5
Tel:+34-91-3649100 ext 170      28014 Madrid
Fax:+34-91-3649119 Spain
Email:  cjramos@xxxxxxxxxx

<Prev in Thread] Current Thread [Next in Thread>