My ISP offers IPv6 via PPPoE with DHCPv6 with prefix delegation.
The situation is like this:
- if I ping6 from the router to any ipv6 host/IP everything is OK
- if I ping6 from a machine in LAN to the router again, OK
- if I ping6 from a machine in LAN to any ipv6 host/IP outside it fails (0 packets received).
The strange thing is that if I first ping6 the router from the machine in LAN then I can acces any IPv6 site from outside for a while.
Oh, btw, ip6tables on the machine in LAN is stopped.
What can it be?