Forum - Router can receive from subnet, but not send to it. :: SixXS

Router can receive from subnet, but not send to it.

Carmen Sandiego on Thursday, 02 August 2007 01:03:15

Hi, I'm using a FreeBSD 6.2 server to setup a tunnel and route traffic to other hosts in the network. I did the same thing succesfully with a FreeBSD 5.4 server, but on the 6.2-server it doesn't work. The tunnel is fine, I can reach the ipv6-internet, when I use a client in the subnet the traffic gets through to the destination, but the response can't get from the router to the client. Or at least that's what I make of these tcpdumps: http://www.heesakkers.info/showandtell/ipv6_troubleshooting.txt "sixxs-aiccu test" gives back nothing Tunnel is T11203 AYIYA nlams05 Subnet is R4825 IPv6 Them 2001:610:600:3a1::2 Prefix2001:610:6ce::/48 ifconfig on the router:

vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet6 fe80::250:8dff:fe51:5d19%vr0 prefixlen 64 scopeid 0x1 inet 192.168.1.1 netmask 0xffff0000 broadcast 192.168.255.255 ether 00:50:8d:51:5d:19 media: Ethernet autoselect (100baseTX <full-duplex>) status: active plip0: flags=108851<UP,POINTOPOINT,RUNNING,SIMPLEX,MULTICAST,NEEDSGIANT> mtu 1500 lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 inet 127.0.0.1 netmask 0xff000000 pflog0: flags=141<UP,RUNNING,PROMISC> mtu 33208 pfsync0: flags=41<UP,RUNNING> mtu 2020 syncpeer: 224.0.0.240 maxupd: 128 tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1280 inet6 fe80::250:8dff:fe51:5d19%tun0 prefixlen 64 scopeid 0x6 inet6 fe80::410:600:3a1:2%tun0 prefixlen 64 scopeid 0x6 inet6 2001:610:600:3a1::2 --> 2001:610:600:3a1::1 prefixlen 128 Opened by PID 808

Yes, the PF-firewall is new in the 6.2-setup, but I have tested it with no rules present and / or pf disabled. Any help is greatly appreciated.

Router can receive from subnet, but not send to it.

Jeroen Massar SixXS Staff

on Wednesday, 01 August 2007 23:22:21

As there is no address from 2001:610:6ce::/48 configured on any of your interfaces how exactly should it be routed where? Also, routing tables are very useful in these cases and others.

Router can receive from subnet, but not send to it.

Carmen Sandiego on Thursday, 02 August 2007 01:02:49

Right, that wasn't too bright of me. Added

ipv6_config_vr0="my-prefix::1 prefixlen 64"

to rc.conf and it works. Thank you for your time

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