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Small Network Setup



Hi all,

I'm setting up the following network. 
The problem is that I can ping 10.0.1.2 and 10.0.1.3 from the router but can't ping 10.0.1.4. I can ping 10.0.1.2 and 10.0.1.3 from PC1 but can't ping 10.0.1.1.
Another problem is that I have to ping 10.0.1.2 and 10.0.1.3 from the router first before pinging 10.0.1.1 from Gateway1 else I'll get Destination Unreachable.
Why is this so?


                   (eth0:161.111.139.71)              (eth1:10.0.1.1)                         (eth0:10.0.1.2)                   (eth1:10.0.1.3)         (eth0:10.0.1.4)                      
Internet <-----------------------------------> Router <-------------------------------------------------------------------> Gateway1 <--------------------------------------> PC1 
                                                              <-------------------------------------------------------------------> Gateway2
                                                               (eth2:10.0.2.1)                           (eth0:10.0.2.2)


I'm running ip-masq on the Router with allowing 10.0.0.0/16 to go out to internet.
The following are the routing entries:

Router : 
Destination             Gateway                           Mask                        Interface
10.0.2.1                  0.0.0.0                          255.255.255.255            eth2
10.0.1.1                  0.0.0.0                          255.255.255.255            eth1
10.0.1.0                 0.0.0.0                           255.255.255.0                eth1
10.0.2.0                  0.0.0.0                          255.255.255.0                eth2
161.111.139.0         0.0.0.0                           255.255.255.0                eth0
0.0.0.0                   161.111.139.3                            0.0.0.0                eth0
    
Gateway1:
Destination             Gateway                           Mask                        Interface
10.0.1.1                  0.0.0.0                         255.255.255.255            eth0
10.0.1.2                  0.0.0.0                          255.255.255.255            eth0
10.0.1.0                 0.0.0.0                           255.255.255.0                eth1
0.0.0.0                   10.0.1.1                            0.0.0.0                        eth0

Gateway1:
Destination             Gateway                           Mask                        Interface
10.0.2.1                  0.0.0.0                         255.255.255.255           eth0
10.0.2.2                  0.0.0.0                          255.255.255.255            eth0
0.0.0.0                   10.0.2.1                            0.0.0.0                        eth0

PC1:
Destination             Gateway                           Mask                        Interface
10.0.1.0                  0.0.0.0                         255.255.255.0               eth0
0.0.0.0                   10.0.1.1                            0.0.0.0                        eth0
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