Hi, I'm having trouble accessing any ipv6 address outside the POP tunnel's endpoint from my winXP host (in subnet). I've spend the last 4 days going through the FAQ's and Forum, and although there were some valid suggestions (e.g. adding 3 proto 41 entries to iptables firewall, adding subnet/64 to the routertable) I still can't get it to work. This is my layout: Internet <---> PoP <--tunnel--> [eth0]Linux Router[eth1] <--subnet--> WinXP Redhat kernel 2.4.9-34 SP1 The tunnel works perfectly; from the router I can ping and access any IPv6 address. From my WinXP host I can ping6 my local tunnel endpoint AND the POP tunnel endpoint, but nothing beyond that. :? I'm guessing something is wrong with the routing on eth1 (but I only started using IPv6 a week ago, so I don't know much yet!). My IPv6 endpoint: 2001:960:2:37d::2 PoP IPv6 endpoint: 2001:960:2:37d::1 Subnet: 2001:960:72c::/48 This is my router setup: (radvd is running) radvd.conf: interface eth1 { AdvSendAdvert on; prefix 2001:960:72c::/64 { AdvOnLink on; AdvAutonomous on; AdvRouterAddr on; }; }; # ip -6 ro sho 2001:960:2:37d::/64 dev sixxs metric 256 mtu 1280 advmss 1220 2001:960:72c::/64 dev eth1 metric 256 mtu 1500 advmss 1440 fe80::/10 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 fe80::/10 dev eth1 proto kernel metric 256 mtu 1500 advmss 1440 fe80::/10 via :: dev sixxs proto kernel metric 256 mtu 1280 advmss 1220 ff00::/8 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 ff00::/8 dev eth1 proto kernel metric 256 mtu 1500 advmss 1440 ff00::/8 dev sixxs proto kernel metric 256 mtu 1280 advmss 1220 default via 2001:960:2:37d::1 dev sixxs metric 1024 mtu 1280 advmss 1220 unreachable default dev lo metric -1 error -101 advmss 1220 # ip -6 addr sho 1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue inet6 ::1/128 scope host 2: eth0: <BROADCAST,PROMISC,NOTRAILERS,UP> mtu 1500 qdisc pfifo_fast qlen 100 inet6 fe80::201:2ff:fe0b:da9/10 scope link 3: eth1: <BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc pfifo_fast qlen 100 inet6 fe80::2a0:24ff:fe33:892b/10 scope link 5: sixxs@NONE: <POINTOPOINT,NOARP,UP> mtu 1280 qdisc noqueue inet6 fe80::d4bb:538d/10 scope link inet6 2001:960:2:37d::2/64 scope global inet6 fe80::c0a8:7fa/10 scope link WinXP setup: Querying active state... Interface 5: Teredo Tunneling Pseudo-Interface Addr Type DAD State Valid Life Pref. Life Address --------- ---------- ------------ ------------ ----------------------------- Link Preferred infinite infinite fe80::5445:5245:444f Interface 4: Local Area Connection Addr Type DAD State Valid Life Pref. Life Address --------- ---------- ------------ ------------ ----------------------------- Public Preferred 29d23h57m53s 6d23h57m53s 2001:960:72c:0:4a54:e8ff:fe21:cd d2 Link Preferred infinite infinite fe80::4a54:e8ff:fe21:cdd2 Interface 2: Automatic Tunneling Pseudo-Interface Addr Type DAD State Valid Life Pref. Life Address --------- ---------- ------------ ------------ ----------------------------- Link Preferred infinite infinite fe80::5efe:192.168.7.21 Interface 1: Loopback Pseudo-Interface Addr Type DAD State Valid Life Pref. Life Address --------- ---------- ------------ ------------ ----------------------------- Loopback Preferred infinite infinite ::1 Link Preferred infinite infinite fe80::1 (So radvd seems to be working ok.) Querying active state... Publish Type Met Prefix Idx Gateway/Interface Name ------- -------- ---- ------------------------ --- --------------------- no Autoconf 8 2001:960:72c::/64 6 Local Area Connection no Autoconf 256 ::/0 6 fe80::2a0:24ff:fe33:892b All looks ok to me. Is there sombody who knows what is going on here? Please help me. Any other ideas are more than welcome... 8-)