[SOLVED] IP Forward problem

[kevintang]

Dear all,

I have a Routing PC (CentOS 5.9) with 2 NICs. One NIC for LAN-A (eth0), one NIC for LAN-B (eth1).
I have another PC connect to LAN-A want to access LAN-B. So I setup IP Forward in my Routing PC, but I seem not to work.

My PC attach at LAN-A can "ping" Routing PC eth0 and eth1, but cannot ping other PC attach on LAN-B
My Routing PC already stop all firewall.

What is the problem in my network?


Routing PC:
=======================
in [b][color=0000FF]/etc/sysctl.conf[/color][/b]
net.ipv4.ip_forward = 1

in [b][color=0000FF]/etc/sysconfig/network[/color][/b]
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=router-pc
FORWARD_IPV4=yes


in [b][color=0000FF]/etc/sysconfig/networking/devices/ifcfg-eth0[/color][/b]
# eth0 attach LAN-A
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
HWADDR=00:1e:4f:f7:44:7b
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes
NETMASK=255.255.255.0
IPADDR=192.168.1.101
GATEWAY=192.168.1.1

in [b][color=0000FF]/etc/sysconfig/networking/devices/ifcfg-eth1[/color][/b]
# eth1 attach LAN-B
DEVICE=eth1
BOOTPROTO=none
ONBOOT=yes
HWADDR=64:70:02:11:55:b3
NETMASK=255.255.255.0
IPADDR=192.168.2.10
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes
#GateWAY use eth0 for route IP out
GATEWAY=192.168.1.101



Win7 PC attach on LAN-A
===========================================
In [b][color=0000FF]IP info of Win7 PC attach on LAN-A[/color][/b]
IPv4 Address. . . . . . . . . . . : 192.168.1.150 (Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1

[b][color=0000FF]Routing Table in Win7 PC attach on LAN-A[/color][/b]
IPv4 Route Table
[code]
===========================================================================
Network Destination Netmask Gateway Interface Metric
192.168.2.0 255.255.255.0 192.168.1.101 192.168.1.150 21
===========================================================================
[/code]

[kevintang]

Problem Solved.
I found my client PC on LAN-B has setting problem. My router pc has no problem.