Re: i need some basic help...

[Talon <megglestone@heritage.sd57.bc.ca>]

Quoting Federico Lazcano <flazcano@hardtec.com.ar>:

> Hi, I have a problem with my linux box. 
> Packets from the internal networks doesn't flow through the external if.
> I had double checked everything, but it still doesn't work. I'm going
> slightly mad.
> 
> INTIF="eth0"
> INTNET="10.0.0.0/24"
> EXTNET="192.168.10.0/24"
> EXTIF="eth1"
> 
> [ Windoz ]10.0.0.10-----------10.0.0.1[ Linux
> ]192.168.10.222-------------192.168.10.1[ Internet ]
> 
> Routing table, I think it's OK
> 
> iguard:/home/radmin# route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 192.168.10.0    0.0.0.0         255.255.255.0   U     0      0        0
> eth1
> 10.0.0.0        0.0.0.0         255.0.0.0       U     0      0        0
> eth0
> 0.0.0.0         192.168.10.1    0.0.0.0         UG    0      0        0
> eth1

> it's not the obvious thing
> echo "1" > /proc/sys/net/ipv4/ip_forward
> 
> my firewall is wide open
> 
> Chain INPUT (policy ACCEPT)
> target     prot opt source               destination
> 
> Chain FORWARD (policy ACCEPT)
> target     prot opt source               destination
> 
> Chain OUTPUT (policy ACCEPT)
> target     prot opt source               destination

I wonder if you need ipmasq installed?
If your running kernel 2.4 you should check your nat table.
Otherwise if your running kernel 2.2, your above statement
doesn't show masq at all.

# apt-get install ipmasq

Cheers,
Mike





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