[K12OSN] OT - Linux router - I'm stuck <-long
Tim Litwiller
tim at litwiller.net
Tue Mar 30 07:05:32 UTC 2004
Christopher K. Johnson wrote:
> Tim,
> What interface is used makes no difference. Whether the interface
> used has the correct subnet, and whether the correct routes are
> configured is what matters. You already verified that ip forwarding
> is on.
>
> I found it too difficult to decipher what the connectivity and routing
> configuration were from the original information.
>
> Take another shot at describing your situation:
> Please state the system names and provide the output of 'route -n' for
> each of the systems involved.
> It would also help if you document connectivity, for example "system1
> eth0 connects to system2 eth1", etc.
> The output of 'iptables -vnL -t filter' and 'iptable -vnL -t nat' for
> each system would be helpful to make sure there is no filtering or
> natting causing the problem.
> Then restate what pinging fails using the system names and interfaces
> you have just documented.
> Hopefully we can help you with the above information.
>
> Chris
>
ok here is the info you asked for: from the machines that show the problem
iptables is not installed on any of the machines so iptables or iptable
has no output
high school router can ping to middle school and district office
middle school router can ping high school and district office -
computers on middle school network can see
servers on high school network - via ip address
district office router can ping middle school router but no middle
school network computer or highschool computers
middle school router
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
172.16.64.0 10.0.1.102 255.255.224.0 UG 0 0 0 eth2
172.16.96.0 10.0.0.2 255.255.224.0 UG 0 0 0 eth1
172.16.0.0 10.0.1.102 255.255.224.0 UG 0 0 0 eth2
172.16.32.0 0.0.0.0 255.255.224.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 10.0.1.102 0.0.0.0 UG 0 0 0 eth2
eth0 inet addr:172.16.32.254 Bcast:172.16.63.255 Mask:255.255.224.0
connects to middle school lan
eth1 inet addr:10.0.0.102 Bcast:10.0.0.255 Mask:255.255.255.0
connects to radio link to district office
eth2 inet addr:10.0.1.2 Bcast:10.0.0.255 Mask:255.255.255.0
connects to radio link to high school
#ip route show
10.0.0.0/24 dev eth1 scope link
172.16.64.0/19 via 10.0.1.102 dev eth2
172.16.96.0/19 via 10.0.0.2 dev eth1
172.16.0.0/19 via 10.0.1.102 dev eth2
172.16.32.0/19 dev eth0 scope link
127.0.0.0/8 dev lo scope link
default via 10.0.1.102 dev eth2
district office router
#route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
172.16.64.0 10.0.0.102 255.255.224.0 UG 0 0 0 eth0
172.16.96.0 0.0.0.0 255.255.224.0 U 0 0 0 eth1
172.16.0.0 10.0.0.102 255.255.224.0 UG 0 0 0 eth0
172.16.32.0 10.0.0.102 255.255.224.0 UG 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 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 10.0.0.102 0.0.0.0 UG 0 0 0 eth0
#ifconfig
eth0 inet addr:10.0.0.2 Bcast:10.0.0.255 Mask:255.255.255.0
connects to radio link to middle school
eth1 inet addr:172.16.96.1 Bcast:172.16.96.255 Mask:255.255.224.0
connects to district office network
#ip route show
10.0.0.0/24 dev eth0 scope link
172.16.64.0/19 via 10.0.0.102 dev eth0
172.16.96.0/19 dev eth1 scope link
172.16.0.0/19 via 10.0.0.102 dev eth0
172.16.32.0/19 via 10.0.0.102 dev eth0
127.0.0.0/8 dev lo scope link
default via 10.0.0.102 dev eth0
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