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Re: IP masquerade question



 Hi Brian!

> I have the network card of the test PC connected (with RJ45 cable)
> to the eth1 network card in the linux box.

 I hope you are using a cross cable or a hub?:))

> The test PC can ping itself (.100), but it can't ping 192.168.0.1
> I also can't ping the PC from the linux box.

 Can you ping from 1 to 1? It seems you can't make the first hop.

> eth0      Link encap:Ethernet  HWaddr 00:D0:B7:1D:CE:A6  
>           inet addr:204.167.104.162  Bcast:204.167.104.191 
>           Mask:255.255.255.224
 (Seems like a funny mask, but allright..)
>...
>           Interrupt:9 Base address:0xd000 
>
> eth1      Link encap:Ethernet  HWaddr 00:D0:B7:1D:89:30  
>...
>           Interrupt:5 Base address:0xb800 

 I seems you are using similar cards. This can be tricky. I tried this
 with 
two ISA 3c509X cards. Setting conf.modules to

alias eth0 3c509
alias eth1 3c509
options 3c509 io=0x300,0x280
options 3c509 irq=10,5

 resulted in the io's and irq's being exchanged, although the cards were
 set 
to 0x300 & 10 resp 0x280 & 5  nPnP.

 Setting conf.modules to

alias eth0 3c509
alias eth1 3c509
options eth0 -o 3c509 io=0x300 irq=10
options eth1 -o 3c509 io=0x280 irq=5

 results in total failure. (Really, the io & irq are hardwired.) I also
 set 
the boot options, both only eth1 as well as both eth0 & eth1 
specified/autoprobe.

 So I left the whole conf.modules alone (no options), just set the lilo
 param 
to "[ether=10,0x300,eth0 ]ether=5,0x280,eth1", but eventually eth0 still
is the card with io set to 280. Bummer. 

> [root ~]# /sbin/route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface 192.168.0.1     0.0.0.0         255.255.255.255 UH    0      0    
>    0 eth1 204.167.104.162 0.0.0.0         255.255.255.255 UH    0      0
>        0 eth0 204.167.104.160 0.0.0.0         255.255.255.224 U     0   
>   0        0 eth0 192.168.0.0     0.0.0.0         255.255.255.0   U    
> 0      0        0 eth1 127.0.0.0       0.0.0.0         255.0.0.0       U
>     0      0        0 lo 0.0.0.0         204.167.104.161 0.0.0.0        
> UG    0      0        0 eth0

 162, 160, 161?
 Have you got ipchains running?

     Bye,

     Leonard.



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