I am using aiccu on osx but I can't get it running. The tun interface is there and everything seems right but I can't ping through it or anything else. I used the newest source and also tried the homebrew package. The host is behind a nat. toby@Tobys-Mac-mini:~$ sudo aiccu test sock_getline() : "200 SixXS TIC Service on nlhaa01.sixxs.net ready (http://www.sixxs.net)" sock_printf() : "client TIC/draft-00 AICCU/2007.01.15-console-darwin Darwin/12.3.0" sock_getline() : "200 Client Identity accepted" sock_printf() : "get unixtime" sock_getline() : "200 1364788367" sock_printf() : "username TPP6-SIXXS" sock_getline() : "200 TPP6-SIXXS choose your authentication challenge please" sock_printf() : "challenge md5" sock_getline() : "200 173136f8fef712eef3bf937d4f26467c" sock_printf() : "authenticate md5 d707afee23c012fe31abc7189fc834d0" sock_getline() : "200 Successfully logged in using md5 as TPP6-SIXXS (Tobias Pollmann)" sock_printf() : "tunnel list" sock_getline() : "201 Listing tunnels" sock_getline() : "T120202 2a02:8204:d600:66::2 ayiya deolo01" sock_getline() : "202 <tunnel_id> <ipv6_endpoint> <ipv4_endpoint> <pop_name>" sock_printf() : "tunnel show T120202" sock_getline() : "201 Showing tunnel information for T120202" sock_getline() : "TunnelId: T120202" sock_getline() : "Type: ayiya" sock_getline() : "IPv6 Endpoint: 2a02:8204:d600:66::2" sock_getline() : "IPv6 POP: 2a02:8204:d600:66::1" sock_getline() : "IPv6 PrefixLength: 64" sock_getline() : "Tunnel MTU: 1280" sock_getline() : "Tunnel Name: My First Tunnel" sock_getline() : "POP Id: deolo01" sock_getline() : "IPv4 Endpoint: ayiya" sock_getline() : "IPv4 POP: 80.228.241.140" sock_getline() : "UserState: enabled" sock_getline() : "AdminState: enabled" sock_getline() : "Password: ...." sock_getline() : "Heartbeat_Interval: 60" sock_getline() : "202 Done" Succesfully retrieved tunnel information for T120202 sock_printf() : "QUIT Illuminaughty" Tunnel Information for T120202: POP Id : deolo01 IPv6 Local : 2a02:8204:d600:66::2/64 IPv6 Remote : 2a02:8204:d600:66::1/64 Tunnel Type : ayiya Adminstate : enabled Userstate : enabled [tun-start] Trying Configured TUN/TAP interface tun0... [tun-start] Using TUN/TAP interface tun0 [tun-start] Setting TUNSIFHEAD for tun0 add net default: gateway 2a02:8204:d600:66::1 [AYIYA-start] : Anything in Anything (draft-02) [AYIYA-tun->tundev] : (Socket to TUN) started heartbeat_socket() - IPv4 : 192.168.1.2 ####### ####### AICCU Quick Connectivity Test ####### ####### [1/8] Ping the IPv4 Local/Your Outer Endpoint (192.168.1.2) ### This should return so called 'echo replies' ### If it doesn't then check your firewall settings ### Your local endpoint should always be pingable ### It could also indicate problems with your IPv4 stack PING 192.168.1.2 (192.168.1.2): 56 data bytes 64 bytes from 192.168.1.2: icmp_seq=0 ttl=64 time=0.099 ms 64 bytes from 192.168.1.2: icmp_seq=1 ttl=64 time=0.064 ms 64 bytes from 192.168.1.2: icmp_seq=2 ttl=64 time=0.108 ms --- 192.168.1.2 ping statistics --- 3 packets transmitted, 3 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 0.064/0.090/0.108/0.019 ms ###### Did this work? [Y/n] Y ####### [2/8] Ping the IPv4 Remote/PoP Outer Endpoint (80.228.241.140) ### These pings should reach the PoP and come back to you ### In case there are problems along the route between your ### host and the PoP this could not return replies ### Check your firewall settings if problems occur PING 80.228.241.140 (80.228.241.140): 56 data bytes 64 bytes from 80.228.241.140: icmp_seq=0 ttl=56 time=27.866 ms 64 bytes from 80.228.241.140: icmp_seq=1 ttl=56 time=26.589 ms 64 bytes from 80.228.241.140: icmp_seq=2 ttl=56 time=26.405 ms --- 80.228.241.140 ping statistics --- 3 packets transmitted, 3 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 26.405/26.953/27.866/0.650 ms ###### Did this work? [Y/n] Y ####### [3/8] Traceroute to the PoP (80.228.241.140) over IPv4 ### This traceroute should reach the PoP ### In case this traceroute fails then you have no connectivity ### to the PoP and this is most probably the problem traceroute to 80.228.241.140 (80.228.241.140), 64 hops max, 52 byte packets 1 192.168.1.1 (192.168.1.1) 1.875 ms 1.146 ms 1.056 ms 2 192.168.2.1 (192.168.2.1) 1.879 ms 2.552 ms 2.955 ms 3 217.0.117.99 (217.0.117.99) 18.054 ms 19.697 ms 17.283 ms 4 87.186.192.114 (87.186.192.114) 17.137 ms 87.186.192.122 (87.186.192.122) 17.718 ms 16.510 ms 5 hh-ea4-i.hh.de.net.dtag.de (62.154.33.37) 20.427 ms hh-ea4-i.hh.de.net.dtag.de (62.154.33.34) 20.673 ms hh-ea4-i.hh.de.net.dtag.de (62.154.33.37) 20.535 ms 6 80.156.163.126 (80.156.163.126) 21.523 ms 80.150.168.162 (80.150.168.162) 20.794 ms 80.156.160.242 (80.156.160.242) 20.983 ms 7 ewetel-ic-155862-hbg-b1.c.telia.net (62.115.8.174) 26.445 ms 25.683 ms 25.087 ms 8 bbrt.ol-0-1-xe-0-3-0.ewe-ip-backbone.de (80.228.90.98) 26.093 ms 26.322 ms 26.212 ms 9 rzrt.rzhl-1-xe-0-0-0.ewe-ip-backbone.de (80.228.98.10) 26.825 ms 26.186 ms 37.023 ms 10 deolo01.sixxs.net (80.228.241.140) 26.458 ms 26.536 ms 26.264 ms ###### Did this work? [Y/n] Y ###### [4/8] Checking if we can ping IPv6 localhost (::1) ### This confirms if your IPv6 is working ### If ::1 doesn't reply then something is wrong with your IPv6 stack PING6(56=40+8+8 bytes) ::1 --> ::1 16 bytes from ::1: Echo Request 16 bytes from ::1, icmp_seq=0 hlim=64 dst=::1 time=0.541 ms 16 bytes from ::1: Echo Request 16 bytes from ::1, icmp_seq=1 hlim=64 dst=::1 time=0.261 ms 16 bytes from ::1: Echo Request 16 bytes from ::1, icmp_seq=2 hlim=64 dst=::1 time=0.379 ms --- ::1 ping6 statistics --- 3 packets transmitted, 3 packets received, 0.0% packet loss round-trip min/avg/max/std-dev = 0.261/0.394/0.541/0.115 ms ###### Did this work? [Y/n] Y ###### [5/8] Ping the IPv6 Local/Your Inner Tunnel Endpoint (2a02:8204:d600:66::2) ### This confirms that your tunnel is configured ### If it doesn't reply then check your interface and routing tables PING6(56=40+8+8 bytes) 2a02:8204:d600:66::2 --> 2a02:8204:d600:66::2 --- 2a02:8204:d600:66::2 ping6 statistics --- 3 packets transmitted, 0 packets received, 100.0% packet loss ###### Did this work? [Y/n] n toby@Tobys-Mac-mini:~$ ifconfig lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 options=3<RXCSUM,TXCSUM> inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 inet 127.0.0.1 netmask 0xff000000 inet6 ::1 prefixlen 128 gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280 stf0: flags=0<> mtu 1280 en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 options=b<RXCSUM,TXCSUM,VLAN_HWTAGGING> ether a8:20:66:11:2f:8a inet6 fe80::aa20:66ff:fe11:2f8a%en0 prefixlen 64 scopeid 0x4 inet 192.168.1.2 netmask 0xffffff00 broadcast 192.168.1.255 media: autoselect (100baseTX <full-duplex,flow-control>) status: active en1: flags=8823<UP,BROADCAST,SMART,SIMPLEX,MULTICAST> mtu 1500 ether 20:c9:d0:8f:ee:65 media: autoselect (<unknown type>) status: inactive p2p0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 2304 ether 02:c9:d0:8f:ee:65 media: autoselect status: inactive fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 4078 lladdr 00:3e:e1:ff:fe:94:b4:02 media: autoselect <full-duplex> status: inactive tun0: flags=8851<UP,POINTOPOINT,RUNNING,SIMPLEX,MULTICAST> mtu 1280 inet6 fe80::aa20:66ff:fe11:2f8a%tun0 prefixlen 64 scopeid 0x8 inet6 2a02:8204:d600:66::2 --> 2a02:8204:d600:66::1 prefixlen 128 open (pid 20605) toby@Tobys-Mac-mini:~$ uname -a Darwin Tobys-Mac-mini.local 12.3.0 Darwin Kernel Version 12.3.0: Sun Jan 6 22:37:10 PST 2013; root:xnu-2050.22.13~1/RELEASE_X86_64 x86_64 toby@Tobys-Mac-mini:~$ netstat -rn Routing tables Internet: Destination Gateway Flags Refs Use Netif Expire default 192.168.1.1 UGSc 17 0 en0 127 127.0.0.1 UCS 0 2 lo0 127.0.0.1 127.0.0.1 UH 441 15677263 lo0 169.254 link#4 UCS 0 0 en0 192.168.1 link#4 UCS 2 0 en0 192.168.1.1 0:22:b0:93:b6:c7 UHLWIir 19 1007 en0 1200 192.168.1.2 127.0.0.1 UHS 1 31 lo0 192.168.1.255 ff:ff:ff:ff:ff:ff UHLWbI 0 7 en0 Internet6: Destination Gateway Flags Netif Expire default 2a02:8204:d600:66::1 UGSc tun0 ::1 link#1 UHL lo0 2a02:8204:d600:66::1 2a02:8204:d600:66::2 UHr tun0 2a02:8204:d600:66::2 link#8 UHL lo0 fe80::%lo0/64 fe80::1%lo0 UcI lo0 fe80::1%lo0 link#1 UHLI lo0 fe80::%en0/64 link#4 UCI en0 fe80::1%en0 74:31:70:fa:5e:dc UHLWIi en0 fe80::aa20:66ff:fe11:2f8a%en0 a8:20:66:11:2f:8a UHLI lo0 fe80::%en1/64 link#5 UCI en1 fe80::%tun0/64 fe80::aa20:66ff:fe11:2f8a%tun0 UcI tun0 fe80::aa20:66ff:fe11:2f8a%tun0 link#8 UHLI lo0 ff01::%lo0/32 fe80::1%lo0 UmCI lo0 ff01::%en0/32 link#4 UmCI en0 ff01::%en1/32 link#5 UmCI en1 ff01::%tun0/32 fe80::aa20:66ff:fe11:2f8a%tun0 UmCI tun0 ff02::%lo0/32 fe80::1%lo0 UmCI lo0 ff02::%en0/32 link#4 UmCI en0 ff02::%en1/32 link#5 UmCI en1 ff02::%tun0/32 fe80::aa20:66ff:fe11:2f8a%tun0 UmCI tun0