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Hi all,

I have been at very long time OpenBSD (since 3.x something) user and
since a couple of years, I have been using the Tunnelbroker.net service
to have IPv6 connectivity for my home network.
Since upgrading to OpenBSD 6.2, this connectivity has ceased to work.
And I can't figure out what has changed to cause it to stop.

Is there anyone else that is running a BGP setup to Tunnelbroker.net and
is using OpenBSD 6.2 ?

This is my information:
pf.conf (relevant rules):
pass in on $ext_if proto 41 from any to any
pass out on $ext_if proto 41 from any to any
pass in on gif0 inet6
pass out on gif0 inet6

# ifconfig gif0
gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1280
index 16 priority 0 llprio 3
groups: gif egress
tunnel: inet 81.235.35.241 -> 216.66.84.54
inet6 fe80::6a05:caff:fe3c:9812%gif0 -> prefixlen 64 scopeid 0x10
inet6 2001:470:12:e0::2 -> 2001:470:12:e0::1 prefixlen 128

# netstat -nr |grep default
default 2001:470:12:e0::1 UGS
0 200 - 8 gif0

# bgpd -vn
AS 200704
router-id 10.0.0.254
socket "/var/run/bgpd.sock.0"
holdtime min 3
log updates
listen on 2001:470:12:e0::2
fib-priority 48
network 2001:67c:11f0::/48
rde rib Adj-RIB-In no evaluate
rde rib Loc-RIB rtable 0 fib-update yes

neighbor 2001:470:12:e0::1 {
descr "tunnelbroker"
remote-as 6939
announce IPv6 unicast
}
allow from AS 6939

# bgpctl show sum
Neighbor AS MsgRcvd MsgSent OutQ Up/Down
State/PrfRcvd
tunnelbroker 6939 0 0 0 Never Active

# tcpdump -ni gif0
tcpdump: listening on gif0, link-type LOOP
07:41:13.039602 2001:470:12:e0::1.8231 > 2001:470:12:e0::2.179: S 3037657124:3037657124(0) win 65000 <mss 1440> [class 0xc0]
07:41:14.138976 2001:470:12:e0::1.8160 > 2001:470:12:e0::2.179: S 3042665795:3042665795(0) win 65000 <mss 1440> [class 0xc0]
07:41:14.389958 2001:470:12:e0::1.8160 > 2001:470:12:e0::2.179: S 3042665795:3042665795(0) win 65000 <mss 1440> [class 0xc0]
07:41:14.991109 2001:470:12:e0::1.8160 > 2001:470:12:e0::2.179: S 3042665795:3042665795(0) win 65000 <mss 1440> [class 0xc0]

So, there is BGP traffic on the gif0 tunnel interface, but the OpenBGP
daemon simply does not pick the traffic up?
Also, there seems to be something wrong in the basic IPv6 networking,
pinging the remote tunnel endpoint fails:
# ping6 2001:470:12:e0::1
PING 2001:470:12:e0::1 (2001:470:12:e0::1): 56 data bytes
ping6: sendmsg: No route to host
ping: wrote 2001:470:12:e0::1 64 chars, ret=-1
ping6: sendmsg: No route to host
ping: wrote 2001:470:12:e0::1 64 chars, ret=-1

This has been working fine for years, but since 6.2 - the traffic has
stopped working.

Anyone has a clue to how I get this networking correct again?

Thanks for any help!
/Johan


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