"2001:db8 is a documentation prefix, looks like someones copied and pasted some config from documentation on your network."

"its not an error message its saying your /64 is attached to your eth2 everything else in your /56 is not routed - ie unreachable everything else is on the internet I'd try clearing your firewall rules to wipe that out, not sure how best to…"

"Having the /56 mapped to your lo is to stop unassigned subnets getting routed back up the tunnel again when they are destined for your endpoint. All more specific, ie /64 subnets will get routed at a higher priority"

"Biggest no-no is using and expecting ipv4 literals in the files formats, protocols the application uses."

"On linux you can change this behaviour: sysctl -w net.ipv6.bindv6only = 1 add the setting to /etc/sysctl.conf for permanence. Caveat: There are bugs in older versions of java that this breaks however."

"I have a wap54g running openwrt, i run a tunnel over it with the following config /etc/config/firewall, appended config rule option proto 41 option target ACCEPT I also have /etc/firewall.user iptables -t nat -A prerouting_wan -j DNAT --to…"

"The MTU is fine, Its on the loopback device - see "dev lo" in that line Paste output of ip6tables -L Basically gotta check that forwarding is accepted. Also check its enabled in kernel sysctl net.ipv6.conf.all.forwarding sysctl…"