Hello, My tunnel is not working. I'm using gentoo with the following settings: ####### /etc/conf.d/net snipet config_eth0=( "194.102.62.8/24" ) modules_sixxs=( "iproute2" ) iptunnel_sixxs=( "mode sit remote 212.18.63.73 local 194.102.62.8 ttl 64 dev eth0" ) config_sixxs=( "2001:15c0:65ff:89::2/64" ) mtu_sixxs="1280" depend_sixxs() { need net.eth0 # Depinde de eth0 } routes_sixxs=( "default via 2001:15c0:65ff:89::1 dev sixxs" ) ############ ####IPv4 connectivity is OK # ping 212.18.63.73 PING 212.18.63.73 (212.18.63.73) 56(84) bytes of data. 64 bytes from 212.18.63.73: icmp_seq=1 ttl=50 time=66.7 ms ####IPv6 tunnel not working # ping6 2001:15c0:65ff:89::1 PING 2001:15c0:65ff:89::1(2001:15c0:65ff:89::1) 56 data bytes --- 2001:15c0:65ff:89::1 ping statistics --- 4 packets transmitted, 0 received, 100% packet loss, time 3001ms ####Tunnels # ip tunnel show tunl0: ip/ip remote any local any ttl inherit nopmtudisc gre0: gre/ip remote any local any ttl inherit nopmtudisc sit0: ipv6/ip remote any local any ttl 64 nopmtudisc sixxs: ipv6/ip remote 212.18.63.73 local 194.102.62.8 dev eth0 ttl 64 #### Interfaces # ip -6 addr show 1: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qlen 1000 inet6 fe80::20e:cff:fe38:377e/64 scope link valid_lft forever preferred_lft forever 2: lo: <LOOPBACK,UP,10000> mtu 16436 inet6 ::1/128 scope host valid_lft forever preferred_lft forever 5: eth1: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qlen 1000 inet6 fe80::230:1bff:fe38:3387/64 scope link valid_lft forever preferred_lft forever 18: sixxs@eth0: <POINTOPOINT,NOARP,UP,10000> mtu 1280 inet6 2001:15c0:65ff:89::2/64 scope global valid_lft forever preferred_lft forever inet6 fe80::c266:3e08/128 scope link valid_lft forever preferred_lft forever The tunnel specifications are: Tunnel Id : T9612 PoP Name : simbx01 (si.medinet [AS8591]) My Location : Timisoara, ro SixXS IPv6 : 2001:15c0:65ff:89::1/64 Your IPv6 : 2001:15c0:65ff:89::2/64 SixXS IPv4 : 212.18.63.73 Tunnel Type : Static (Proto-41) Your IPv4 : 194.102.62.8