Re: Problems forwarding IPv6 to tunnel
If you're forwarding ipv6 packets, then the default route is never used. It's an
Alexey thing. You need specific routes for everything :(
D
Michel Onstein wrote:
> According to Craig Small:
> > Michel Onstein said:
> > > (IPv4/IPv6). However when sending a IPv6 packet from the non-gateway
> > > host to the outside world (which should be tunneled by the gateway) i
> > > only receive an ICMPv6 unreachable notifaction.
> > Who sends this ICMP packet back?
> >
> The gateway...
>
> > > So somehow my gateway is not forwarding IPv6 packets. Below there's
> > > a snippet from the ipv6 configuration part:
> > You've got some routes setup? You may also need to add IPv4 forwarding.
> >
> Both there ;( For the sake of completeness... i'll cut and paste the config
> of both boxes, angel == gateway, hamiller = desktop
>
> --- angel, /etc/init.d/network
>
> # Local interface
> ifconfig lo 127.0.0.1
> route add -net 127.0.0.0
>
> # Our IPv4 ethernet
> ifconfig eth0 192.168.2.2 netmask 255.255.255.0 broadcast 192.168.2.255
> ifconfig eth0:1 192.168.2.6 netmask 255.255.255.0
> ifconfig eth0:2 192.168.2.7 netmask 255.255.255.0 broadcast 192.168.2.255
>
> route add -net x.x.70.64 netmask 255.255.255.252 eth0
>
> # Configure routing
> echo "1" > /proc/sys/net/ipv4/ip_forward
>
> echo "Enabling firewall..."
> ipchains -A forward -p all -s 192.168.2.0/24 -d 0.0.0.0/0 -j MASQ;
>
> # Our IPv6 ethernet
> echo 0 > /proc/sys/net/ipv6/conf/all/autoconf
> echo 0 > /proc/sys/net/ipv6/conf/all/accept_ra
> echo 0 > /proc/sys/net/ipv6/conf/all/accept_redirects
> echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
> echo 0 > /proc/sys/net/ipv6/conf/all/router_solicitations
>
> ifconfig eth0 add 3ffe:y:5:0:2::2/80
>
> ifconfig sit0 up tunnel ::x.x.77.162
> ifconfig sit1 up
> route -A inet6 add 0::0/0 gw fe80::x.x.77.162 dev sit1
>
> --- hamiller, /etc/init.d/network
>
> ifconfig lo 127.0.0.1
> route add -net 127.0.0.0
>
> ifconfig eth0 x.x.70.66 netmask 255.255.255.252 broadcast x.x.70.67
> route add -net 192.168.2.0 netmask 255.255.255.0 dev eth0
>
> route add default gw 192.168.2.2 metric 1
>
> # IPv6 stuff below
> echo 0 > /proc/sys/net/ipv6/conf/all/autoconf
> echo 0 > /proc/sys/net/ipv6/conf/all/accept_ra
> echo 0 > /proc/sys/net/ipv6/conf/all/accept_redirects
> echo 0 > /proc/sys/net/ipv6/conf/all/forwarding
> echo 0 > /proc/sys/net/ipv6/conf/all/router_solicitations
>
> ifconfig eth0 add 3ffe:y:5:0:2::1/80
> route -A inet6 add 0::0/0 gw 3ffe:y:5:0:2::2 dev eth0
>
> --- dun
>
> Anyone again? ;-)
>
> Michel
>
> --
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