My deham01 endpoint for tunnel T11085 is currently not working, I get back ICMP protocol 41 port 0 unreachable. Everything else looks good (aiccu configures everything else just fine). Nov 5 16:37:20 grml aiccu: Succesfully retrieved tunnel information for T11085 Nov 5 16:37:20 grml aiccu: AICCU running as PID 23592 Ping the tunnel IPv6 adderss on deham01's side: 16:30:04.017202 IP 217.229.229.218 > 212.224.0.188: IP6 2001:6f8:900:849::2 > 2001:6f8:900:849::1: ICMP6, echo request, seq 3, length 64 16:30:04.091473 IP 212.224.0.188 > 217.229.229.218: ICMP 212.224.0.188 protocol 41 port 0 unreachable, length 132 Web traffic: 16:32:09.832220 IP 217.229.229.218 > 212.224.0.188: IP6 2001:6f8:105a:1:f19f:5d17:99e1:3684.50863 > 2001:838:1:1:210:dcff:fe20:7c7c.80: Flags [S], seq 3539171533, win 8192, options [[|tcp] 16:32:09.902068 IP 212.224.0.188 > 217.229.229.218: ICMP 212.224.0.188 protocol 41 port 0 unreachable, length 100