MASQUERADE MAIL SERVER

["Wilbert J. Rojas O." <sysadmin@ideay.net.ni>]

  Hello,

My Network configuration is that:


ISP
|
|
|
|  *eth0 200.9.190.20* *eth0:1* 200.9.190.21 *eth0:2* 200.9.190.23 
*eth0:3* 200.9.190.24 *eth0:4* 200.9.190.25
LINUX BOX
|  *eth1 10.24.54.1/32*
|
|
LAN  10.24.54.0/24  gw 10.24.54.1
|
|
MAIL SERVER 10.54.24.96/32  gw 10.24.54.1



All machines to get out to INTERNET through my LINUX BOX included my 
MAIL SERVER but i want that MAIL SERVER to get out to INTERNET with IP 
Public Address different like 200.9.190.25 and my all rest network get 
out through 200.9.190.20

The rules i have applied like this but i don't know how to do that:

/sbin/iptables -t nat -A PREROUTING -i eth1 -s 10.24.54.0/255.255.255.0 
-d 0/0 -p tcp --dport 80 -j REDIRECT --to-port 8080
/sbin/iptables -t nat -A PREROUTING -i eth1 -s 10.24.54.0/255.255.255.0 
-d 0/0 -p tcp --dport 8080 -j REDIRECT --to-port 8080

/sbin/iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

/sbin/iptables -t nat -A PREROUTING -p tcp -i eth0 -d 200.9.190.20 
--dport 25 -j DNAT --to-destination 10.24.54.96:25
/sbin/iptables -t nat -A PREROUTING -p tcp -i eth0 -d 200.9.190.20 
--dport 110 -j DNAT --to-destination 10.24.54.96:110
/sbin/iptables -t nat -A PREROUTING -p tcp -i eth0 -d 200.9.190.20 
--dport 143 -j DNAT --to-destination 10.24.54.96:143


Any help or suggestions ??

Regards.



================================
Ing. Wilbert José Rojas Ochoa.
Administrador de Sistemas
Ideay ~ Equipos y Sistemas.
Managua, Nicaragua.
Telf. +(505) 2277-4000 Ext: 115.
Fax   +(505) 2277-4411.
USA:  +(305) 735-8364.
Cel.  +(505) 8883-2877.
================================



-- 
================================
Ing. Wilbert José Rojas Ochoa.
Administrador de Sistemas
Ideay ~ Equipos y Sistemas.
Managua, Nicaragua.
Telf. +(505) 2277-4000 Ext: 115.
Fax   +(505) 2277-4411.
USA:  +(305) 735-8364.
Cel.  +(505) 8883-2877.
================================