Date: Sun, 23 Aug 2015 16:04:08 +0100 From: Gary Palmer <gpalmer@freebsd.org> To: freebsd-net@freebsd.org Subject: Routing IPv6 over tun0 (PPPoE) issue Message-ID: <20150823150408.GE13503@in-addr.com>
next in thread | raw e-mail | index | archive | help
Hi,
I'm trying to set up IPv6 now that my ISP has decided to start offering
native V6. I've been using a tunnelbroker setup until now. I have
ipv6_gateway_enable="YES"
ipv6_cpe_wanif="tun0"
set in /etc/rc.conf and PPP has "enable ipv6cp" set. OS is
FreeBSD 9.3-RELEASE-p21
When the system boots up I get
tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1492
options=80000<LINKSTATE>
inet6 fe80::200:24ff:fec9:5bbc%tun0 prefixlen 64 scopeid 0xa
inet 217.155.53.182 --> 62.3.83.6 netmask 0xffffffff
inet6 xxxx:yyyy:zzzz:2:200:24ff:fec9:5bbc prefixlen 64 autoconf
nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
Opened by PID 1038
Routing is
# netstat -nr -f inet6
Routing tables
Internet6:
Destination Gateway Flags Netif Expire
::/96 ::1 UGRS lo0 =>
default fe80::230:88ff:fe16:ec4f%tun0 UG tun0
::1 link#9 UH lo0
<etc>
traceroute6 www.freebsd.org works when the traffic is sourced from the
tun0 interface IP
# traceroute6 www.freebsd.org
traceroute6 to wfe0.ysv.freebsd.org (2001:1900:2254:206a::50:0) from xxxx:yyyy:zzzz:2:200:24ff:fec9:5bbc, 64 hops max, 12 byte packets
1 xxxx:yyyy::3:0:0:2 29.030 ms 28.782 ms 29.205 ms
2 xxxx:yyyy:0:301:: 29.414 ms 28.967 ms 29.232 ms
3 xxxx:yyyy:0:4::1 28.750 ms 29.253 ms 82.200 ms
4 xxxx:yyyy:0:3::1 36.181 ms 35.352 ms 35.330 ms
<etc>
However if I configure other IPs on other interfaces from the netblock that
has been delegated to me and either source the traffic from those IPs or
try the traceroute from another computer using IPs in that netblock, I
don't even see the traffic leaving tun0 with tcpdump, let alone get any
replies.
I do have PF running, but all my rules that stop traffic are logged
and I don't see any hits in pflog. Also, I tried turning pf off once
and didn't have any luck either, although I must admit I didn't leave it
off long for obvious reasons, so maybe I missed something in my test.
Any ideas? Is it because I am routing to a link local address rather
than a routable IP? Unfortunately the returned packets from the first
hop aren't in the subnet I was given for the link so I can't use that
as a gateway.
Thanks,
Gary
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20150823150408.GE13503>