[bugreport] IPv6 broken in 378.50

[tehkode]

After flashing new firmware, doing factory reset and reconfiguring router from scratch i've met the fact IPv6 stop working.

Here is diagnosis:

ICMP is working

$ ping6 ipv6.google.com
PING6(56=40+8+8 bytes) 2a02:2698:6c26:a8df:3175:a23d:ea6c:496d --> 2a00:1450:400f:803::1003
16 bytes from 2a00:1450:400f:803::1003, icmp_seq=0 hlim=55 time=30.409 ms
16 bytes from 2a00:1450:400f:803::1003, icmp_seq=1 hlim=55 time=20.383 ms
16 bytes from 2a00:1450:400f:803::1003, icmp_seq=2 hlim=55 time=20.649 ms

But anything else does not

$ curl -v -6 http://ipv6.google.com/
* Adding handle: conn: 0x7fd6a300a600
* Adding handle: send: 0
* Adding handle: recv: 0
* Curl_addHandleToPipeline: length: 1
* - Conn 0 (0x7fd6a300a600) send_pipe: 1, recv_pipe: 0
* About to connect() to ipv6.google.com port 80 (#0)
*   Trying 2a00:1450:400f:803::1003...
* Failed connect to ipv6.google.com:80; Operation timed out
* Closing connection 0
curl: (7) Failed connect to ipv6.google.com:80; Operation timed out

IPv6 Firewall is disabled



BUT

# ip6tables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     ipv6-nonxt    anywhere             anywhere             length 40
ACCEPT     all      anywhere             anywhere            
ACCEPT     all      anywhere             anywhere            
ACCEPT     udp      anywhere             anywhere             udp spt:547 dpt:546
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp destination-unreachable
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp packet-too-big
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp time-exceeded
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp parameter-problem
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp echo-request
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp echo-reply
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 130
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 131
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 132
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp router-solicitation
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp router-advertisement
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp neighbour-solicitation
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp neighbour-advertisement
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 141
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 142
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 143
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 148
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 149
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 151
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 152
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmptype 153
[U][B]logdrop    all      anywhere             anywhere    [/B][/U]        

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
DROP       all      anywhere             anywhere             rt type:0 segsleft:0
[B][U]logdrop    all      anywhere             anywhere            [/U][/B]
logdrop    all      anywhere             anywhere             state INVALID
ACCEPT     all      anywhere             anywhere            
ACCEPT     ipv6-nonxt    anywhere             anywhere             length 40
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp destination-unreachable
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp packet-too-big
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp time-exceeded
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp parameter-problem
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp echo-request
ACCEPT     ipv6-icmp    anywhere             anywhere             ipv6-icmp echo-reply

IPTABLES is messed up

However flushing ip6tables doesn't help.

I believe its not iptables related problem, since counters in "ip6tables -L -v" doesn't change on curl.
However they change on ICMP (traceroute6, ping6).

HALP!