Hi, i'm running the following setup script to start the inital ipv6-over-ipv4 tunnel, after I've launched my internet connection. #!/bin/sh ip tunnel add sixxs mode sit local $LOCAL_IP remote 212.224.0.188 ip link set sixxs up ip link set mtu 1280 dev sixxs ip tunnel change sixxs ttl 64 ip -6 add add 2001:6f8:900:1fc::2/64 dev sixxs ip -6 route add default via 2001:6f8:900:1fc::1 dev sixxs heartbeat-client /etc/heartbeat/heartbeat.conf I can't ping the gateway. penguin1:/home/jens# ping6 2001:6f8:900:1fc::1 PING 2001:6f8:900:1fc::1(2001:6f8:900:1fc::1) from 2001:6f8:900:1fc::2 : 56 data bytes --- 2001:6f8:900:1fc::1 ping statistics --- 13 packets transmitted, 0 received, 100% loss, time 11998ms Simulatanously I ran tethereal - here the output. penguin1:/etc/heartbeat# tethereal -i ppp0 proto 41 Capturing on ppp0 0.000000 cl-509.muc-01.de.sixxs.net -> gw-509.muc-01.de.sixxs.net ICMPv6 Echo request 0.999852 cl-509.muc-01.de.sixxs.net -> gw-509.muc-01.de.sixxs.net ICMPv6 Echo request 1.999652 cl-509.muc-01.de.sixxs.net -> gw-509.muc-01.de.sixxs.net ICMPv6 Echo request 2.999774 cl-509.muc-01.de.sixxs.net -> gw-509.muc-01.de.sixxs.net ICMPv6 Echo request 3.999392 cl-509.muc-01.de.sixxs.net -> gw-509.muc-01.de.sixxs.net ICMPv6 Echo request 4.999227 cl-509.muc-01.de.sixxs.net -> gw-509.muc-01.de.sixxs.net ICMPv6 Echo request 5.999124 cl-509.muc-01.de.sixxs.net -> gw-509.muc-01.de.sixxs.net ICMPv6 Echo request 6.998959 cl-509.muc-01.de.sixxs.net -> gw-509.muc-01.de.sixxs.net ICMPv6 Echo request 7.998738 cl-509.muc-01.de.sixxs.net -> gw-509.muc-01.de.sixxs.net ICMPv6 Echo request I don't get any ipv6 replies from gw-509.muc-01.de.sixxs.net! The heartbeat client is running, the lastest syslog entry: heartbeat-client: [HB] HEARTBEAT TUNNEL 2001:6f8:900:1fc::2 217.236.160.106 1083122276 5 ***password*** Here's my heartbeat.conf # Configuration for SixXS Heartbeat Client # SixXS - http://www.sixxs.net # # Commentlines start with semicolon (;), hash (#), # double slash (//) or a space ( ). # Empty lines are ignored. # Argument values may be quoted using single (') and double (") quotes. # # examples: # os linux # os "linux" # os 'linux' # Operating System (linux/freebsd/openbsd/netbsd/winxp) os "linux" # Interface the tunnel should go over # used for detecting the local IPv4 endpoint ipv4_interface "ppp0" # IPv4 address of the POP (nlams01/nlams02/nlams04/demun01/iedub01/dkcop01) # This is also the address to where heartbeats are sent ipv4_pop "demuc01.sixxs.net" # ipv4_local is figured out automatically # from the ipv4_interface # Special case for people having their # endpoint behind a NAT # hb_behindnat 1 # # Don't change the local tunnel endpoint #hb_statictunnel 1 # # The hostname or IP of the 'external' IP # from which the heartbeat should originate # Note that mismatching IP's will be dropped #ipv4_local_resolve public-ip.example.net # Interface to be used for the tunnel # will be created on the OS's that need that ipv6_interface "sixxs" # The local and remote sides of the tunnel ipv6_pop "2001:6f8:900:1fc::1" ipv6_local "2001:6f8:900:1fc::2" # The prefix length of the tunnel # Tunnel space is thus ipv6_pop/ipv6_prefixlen ipv6_prefixlen 64 # The Heartbeat password for this tunnel hb_password "***password***" # The interval at which to send the heartbeat hb_sendinterval 60 # Informational: after this timeout the tunnel # is taken down at the POP side hb_timeout 300 # Put the client in the background? (default) # Set to 0 to keep in foreground, eg for daemontools # Non-daemonized will also cause logs to be send to stdout daemonize 1 and ip -6 route shows: 2001:6f8:900:1fc::/64 via :: dev sixxs metric 256 mtu 1280 advmss 1220 fe80::/64 dev eth0 metric 256 mtu 1500 advmss 1220 fe80::/64 dev eth2 metric 256 mtu 1500 advmss 1220 fe80::/64 dev dummy0 metric 256 mtu 1500 advmss 1220 fe80::/64 dev eth1 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 eth2 metric 256 mtu 1500 advmss 1220 ff00::/8 dev dummy0 metric 256 mtu 1500 advmss 1220 ff00::/8 dev eth1 metric 256 mtu 1500 advmss 1220 ff00::/8 dev sixxs metric 256 mtu 1280 advmss 1220 default via 2001:6f8:900:1fc::1 dev sixxs metric 1024 mtu 1280 advmss 1220 I don't have any ideas! I've tried an other tunnel broker, and it worked without any problems! So it cannot be an firewall issue! Greetings Jens