i have problem

[iShift]

Hi, after i have tunnel, and all my wi-fi device have ip, i can ping6 to server (where 6in4 tool installed) bit i can't ping/access ipv6 internet. can you help?

[sskaje]

Hi @iShift , did you have
net.ipv6.conf.all.forwarding = 1
in your sysctl.conf ?

[iShift]

yes:
~$ cat /etc/sysctl.conf | grep net.ipv6

net.ipv6.conf.all.forwarding=1
#net.ipv6.conf.all.accept_redirects = 0
#net.ipv6.conf.all.accept_source_route = 0

[sskaje]

@iShift delete your reply, hide your address and then repost

[iShift]

@sskaje
when i ping google:
from my server

shift@:~$ ping6 ipv6.google.com
PING ipv6.google.com(ams16s22-in-x0e.1e100.net) 56 data bytes
64 bytes from ams16s22-in-x0e.1e100.net: icmp_seq=1 ttl=58 time=0.758 ms
64 bytes from ams16s22-in-x0e.1e100.net: icmp_seq=2 ttl=58 time=0.600 ms
64 bytes from ams16s22-in-x0e.1e100.net: icmp_seq=3 ttl=58 time=0.583 ms
64 bytes from ams16s22-in-x0e.1e100.net: icmp_seq=4 ttl=58 time=0.553 ms

from mac:

MacBook-Pro:~ Shift$ ping6 ipv6.google.com
PING6(56=40+8+8 bytes) xxxx --> 2a00:1450:4010:c02::66
^C
--- ipv6.l.google.com ping6 statistics ---
5 packets transmitted, 0 packets received, 100.0% packet loss

but from mac i can ping my server:

MacBook-Pro:~ Shift$ ping6 server_ipv6_ip
PING6(56=40+8+8 bytes) xxx --> yyy
16 bytes from yyy, icmp_seq=0 hlim=63 time=43.716 ms
16 bytes from yyy, icmp_seq=1 hlim=63 time=41.833 ms
16 bytes from yyy, icmp_seq=2 hlim=63 time=41.732 ms

on server i see that interface:

tun_6in4_1 Link encap:IPv6-in-IPv4  
          inet6 addr: ppp/64 Scope:Global
          inet6 addr: zzz/64 Scope:Link
          UP POINTOPOINT RUNNING NOARP  MTU:1280  Metric:1
          RX packets:579 errors:0 dropped:0 overruns:0 frame:0
          TX packets:257 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:52581 (52.5 KB)  TX bytes:40749 (40.7 KB)

PS, why? my server have public ipv6 ip and i don't shame for them =)

[sskaje]

@iShift

Show me your route table on your server.
netstat -nr6

For deletion, if you don't have a good ipv6 firewall rule, don't paste your IP address.

[iShift]

i fix for one IP after my router - i add this to server:
sudo ip6tables -t nat -A POSTROUTING -s MY_IPV6_behinde_home_router -o eth0 -j MASQUERADE

to fix all my access what i should do?

2a03:b0c0:0:1::/64             ::                         Un   256 1     3 tun_6in4_1
2a03:b0c0:0:1010::/64          ::                         U    256 1     7 eth0
2a03:b0c0:0:8001::/64          ::                         U    1024 1    80 tun_6in4_1
fe80::/64                      ::                         U    256 0     0 eth1
fe80::/64                      ::                         U    256 0     0 eth0
fe80::/64                      ::                         Un   256 0     0 tun_6in4_1
::/0                           2a03:b0c0:0:1010::1        UG   1024 1 10498 eth0
::/0                           ::                         !n   -1  1 10690 lo
::1/128                        ::                         Un   0   2  8850 lo
2a03:b0c0:0:1::/128            ::                         Un   0   1     0 lo
2a03:b0c0:0:1::1/128           ::                         Un   0   1     0 lo
2a03:b0c0:0:1010::/128         ::                         Un   0   1     0 lo
2a03:b0c0:0:1010::7:7001/128   ::                         Un   0   2  9206 lo
fe80::/128                     ::                         Un   0   1     0 lo
fe80::/128                     ::                         Un   0   1     0 lo
fe80::/128                     ::                         Un   0   1     0 lo
fe80::5f55:2e4a/128            ::                         Un   0   1     0 lo
fe80::601:10ff:fe8a:8901/128   ::                         Un   0   2  3390 lo
fe80::601:10ff:fe8a:8902/128   ::                         Un   0   1     0 lo
ff00::/8                       ::                         U    256 0     0 eth1
ff00::/8                       ::                         U    256 0     0 eth0
ff00::/8                       ::                         U    256 0     0 tun_6in4_1
::/0                           ::                         !n   -1  1 10690 lo

[iShift]

and this fix all my device
sudo ip6tables -t nat -A POSTROUTING -s ip_v6_from_tunnel_interface/64 -o eth0 -j MASQUERADE

[iShift]

is it good solution ? (if yes, i can make PR for your script)

[GooG2e]

@sskaje any way to use this without nat?