IPv6 forwarding

azeus · 10-10-2008, 12:26 PM

I have two network
one is DMZ and one is Internal zone
both run IPV6
a linux server CentOS has two interface to connect both zone
I had set
net.ipv6.conf.all.forwarding = 1

however, the internal zone machine cannot ping DMZ machine.

The error message is that " connect: Network is unreachable"

Do I miss out something?

chort · 10-10-2008, 08:44 PM

Are you using link-local addresses? If so, those won't forward.

azeus · 10-10-2008, 11:09 PM

Quote:

Originally Posted by chort

Are you using link-local addresses? If so, those won't forward.

No, I set the ip manually which is "Scope:Global"

azeus · 10-11-2008, 12:37 AM

Oh
i think it is my gateway setting problem

ip -6 route show eth0

interface eth0 has default route

however no default route find in eth1

how to set eth1 route packet to eth0??

estabroo · 10-11-2008, 08:45 AM

Make sure that forwarding is really on:

cat /proc/sys/net/ipv6/conf/all/forwarding

if its a 0 do echo 1 > /proc/sys/net/ipv6/conf/all/forwarding

chort · 10-11-2008, 01:04 PM

The default route should point to only one interface. If you attempt to set multiple default routes, you'll just cause more problems.

azeus · 10-12-2008, 09:57 AM

Quote:

Originally Posted by estabroo

Make sure that forwarding is really on:

cat /proc/sys/net/ipv6/conf/all/forwarding

if its a 0 do echo 1 > /proc/sys/net/ipv6/conf/all/forwarding

Thank you
yes
it is 1

When my internal machine ping6 DMZ machine
this error come out
connect: Network is unreachable

azeus · 10-12-2008, 10:30 AM

reboot is god
I reboot the machines and the internal machines
then internal can ping the eth0 interface of that connection machine
but still cannot ping DMZ

7 packets transmitted, 0 received, 100% packet loss, time 6008ms

azeus · 10-12-2008, 11:42 AM

the problem is fixed
The behind reason is my router setting without return path

thank you everyone

kimhien1989 · 11-05-2010, 09:32 PM

Quote:

Originally Posted by azeus

the problem is fixed
The behind reason is my router setting without return path

thank you everyone

I have a trouble similar to you.Can you help me config my Router (RHL 5) with return path ? What is return path in Linux ?