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only replies the endpoint
![[es]](/s/countries/es.gif) Carmen Sandiego on Friday, 16 January 2004 21:41:32
hi all:
I have a problem with my tunnel, only my endpoint and "myself" seems to reply to ping. I was checking posts in this forum to try to fix the problem but I didn't. I use debian unstable with linux 2.4.24. I'm behind DSL connection.
this is the content in /etc/network/interfaces
iface sixxs inet6 v4tunnel
address 2001:b18:2000:2::2
netmask 64
endpoint 81.92.202.9
ttl 64
up ip link set mtu 1280 dev sixxs
up ip route add 2000::/3 via 2001:b18:2000:2::1 dev sixxs
[21:33] <manuel@gada> /root/sixxs $ ip link list sixxs
14: sixxs@NONE: <POINTOPOINT,NOARP,PROMISC,UP> mtu 1280 qdisc noqueue
link/sit 0.0.0.0 peer 81.92.202.9
[21:33] <manuel@gada> /root/sixxs $ ip address list sixxs
14: sixxs@NONE: <POINTOPOINT,NOARP,PROMISC,UP> mtu 1280 qdisc noqueue
link/sit 0.0.0.0 peer 81.92.202.9
inet6 2001:b18:2000:2::2/64 scope global
inet6 fe80::c0a8:2/64 scope link
[21:33] <manuel@gada> /root/sixxs $ ip -6 route list
2000::/3 via 2001:b18:2000:2::1 dev sixxs metric 1024 mtu 1280 advmss 1220
fe80::/64 dev eth0 metric 256 mtu 1500 advmss 1220
fe80::/64 via :: dev sixxs metric 256 mtu 1280 advmss 1220
ff00::/8 dev eth0 metric 256 mtu 1500 advmss 1220
ff00::/8 dev sixxs metric 256 mtu 1280 advmss 1220
unreachable default dev lo proto none metric -1 error -101 advmss 1220
and the commands:
[21:35] <manuel@gada> /root/sixxs $ ping6 2001:b18:2000:2::1
PING 2001:b18:2000:2::1(2001:b18:2000:2::1) 56 data bytes
64 bytes from 2001:b18:2000:2::1: icmp_seq=1 ttl=64 time=197 ms
64 bytes from 2001:b18:2000:2::1: icmp_seq=2 ttl=64 time=196 ms
64 bytes from 2001:b18:2000:2::1: icmp_seq=3 ttl=64 time=190 ms
--- 2001:b18:2000:2::1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2022ms
rtt min/avg/max/mdev = 190.590/194.822/197.074/2.994 ms
[21:37] <manuel@gada> /root/sixxs $ ping6 2001:b18:2000:2::2
PING 2001:b18:2000:2::2(2001:b18:2000:2::2) 56 data bytes
64 bytes from 2001:b18:2000:2::2: icmp_seq=1 ttl=64 time=0.110 ms
64 bytes from 2001:b18:2000:2::2: icmp_seq=2 ttl=64 time=0.095 ms
64 bytes from 2001:b18:2000:2::2: icmp_seq=3 ttl=64 time=0.099 ms
--- 2001:b18:2000:2::2 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 0.095/0.101/0.110/0.010 ms
[21:37] <manuel@gada> /root/sixxs $ ping6 www.kame.net
PING www.kame.net(orange.kame.net) 56 data bytes
--- www.kame.net ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 4016ms
tcpdump output meanwhile:
21:37:28.884159 2001:b18:2000:2::2 > 2001:b18:2000:2::1: icmp6: echo request
21:37:29.081166 2001:b18:2000:2::1 > 2001:b18:2000:2::2: icmp6: echo reply
21:37:29.896670 2001:b18:2000:2::2 > 2001:b18:2000:2::1: icmp6: echo request
21:37:30.093413 2001:b18:2000:2::1 > 2001:b18:2000:2::2: icmp6: echo reply
21:37:30.906580 2001:b18:2000:2::2 > 2001:b18:2000:2::1: icmp6: echo request
21:37:31.097112 2001:b18:2000:2::1 > 2001:b18:2000:2::2: icmp6: echo reply
21:37:39.669213 2001:b18:2000:2::2 > 2001:200:0:8002:203:47ff:fea5:3085: icmp6: echo request
21:37:40.685657 2001:b18:2000:2::2 > 2001:200:0:8002:203:47ff:fea5:3085: icmp6: echo request
21:37:41.685584 2001:b18:2000:2::2 > 2001:200:0:8002:203:47ff:fea5:3085: icmp6: echo request
21:37:42.685488 2001:b18:2000:2::2 > 2001:200:0:8002:203:47ff:fea5:3085: icmp6: echo request
21:37:43.685450 2001:b18:2000:2::2 > 2001:200:0:8002:203:47ff:fea5:3085: icmp6: echo request
any idea? thanks in advance :)
only replies the endpoint
![[pt]](/s/countries/pt.gif) Shadow Hawkins on Friday, 16 January 2004 23:50:22
I'm seeing precisely the same thing here.
I notice we both use the same IPv6 ISP (2001:b18:2000 NFSi, in Portugal) so I guess is something in the routing tables of the ISP...
Does anyone know a way to contact the ISP endpoint?
Regards,
Paulo
only replies the endpoint
Carmen Sandiego on Saturday, 17 January 2004 00:20:20
yes, it's that POP.
I also had some problems the day that I enabled the tunnel. it was for several hours that the endpoint itself didn't reply to the ping, much more than those 15mins that the faq talks about. in fact I decided to stop trying for 1 week +-, till yesterday, when I tried to ping again and it worked.
I don't know what's the problem, as you can see in the explanations, but it also could be some kind of problem/delay from the POP..?
brigadão Paulo! bye all!
only replies the endpoint
Shadow Hawkins on Saturday, 17 January 2004 00:42:52
I really do believe its something with the POP routing tables (or firewall), since I am able to ping YOU:
# ping6 2001:b18:2000:2::2
PING6(56=40+8+8 bytes) 2001:b18:2000:7::2 --> 2001:b18:2000:2::2
16 bytes from 2001:b18:2000:2::2, icmp_seq=0 hlim=63 time=369.055 ms
16 bytes from 2001:b18:2000:2::2, icmp_seq=1 hlim=63 time=306.129 ms
16 bytes from 2001:b18:2000:2::2, icmp_seq=2 hlim=63 time=638.129 ms
16 bytes from 2001:b18:2000:2::2, icmp_seq=3 hlim=63 time=605.647 ms
16 bytes from 2001:b18:2000:2::2, icmp_seq=4 hlim=63 time=407.048 ms
16 bytes from 2001:b18:2000:2::2, icmp_seq=5 hlim=63 time=657.232 ms
^C
--- 2001:b18:2000:2::2 ping6 statistics ---
6 packets transmitted, 6 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 306.129/497.207/657.232/140.409 ms
However, I cannot, for instance, ping www.sixxs.net:
sinfonia# ping6 www.sixxs.net
PING6(56=40+8+8 bytes) 2001:b18:2000:7::2 --> 2001:838:1:1:210:dcff:fe20:7c7c
^C
--- noc.sixxs.net ping6 statistics ---
6 packets transmitted, 0 packets received, 100.0% packet loss
That means either the routing table of the host we connect to is wrong, since we cannot reach outside nodes, or there is some sort of mechanism at work (a firewall?) preventing us to reach out.
Regards,
Paulo
only replies the endpoint
Carmen Sandiego on Saturday, 17 January 2004 00:51:08
I also can to ping you, and:
[00:46] <root@gada> ~/sixxs # tracepath6 2001:b18:2000:7::2
1?: [LOCALHOST] pmtu 1280
1: gw-3.lis-01.pt.sixxs.net 383.429ms
2: cl-8.lis-01.pt.sixxs.net 428.746ms reached
Resume: pmtu 1280 hops 2 back 2
so as you say, routes or some other problem are preventing us from seeing the light! :{
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