My ssh to some IPv6-hosts goes reilly weird;
the OS is fbsd, gif0 is the default route for IPv6, tun0 is the default
route for IPv4
The setup of the ssh -6 connection goes very well, but suddenly, my
ssh-client starts sending ACK's through tun0, not encapsulated...

oerbier is the remote host, and the IP can be looked up in a local
dnsserver, there's no reverse dns; 
while 3ffe:8100:100:a::1459 is the local IP.  I've been able to connect
to 'oerbier' from a debian-unstable with ssh 2.9 behind this host who's
acting as router and has router advertisement daemon; so I suppose the
routing should be ok.

kristof@zoon:/usr/home/kristof$ ssh -6 [EMAIL PROTECTED]
Enter passphrase for key '/home/kristof/.ssh/id_dsa':
[EMAIL PROTECTED]'s password:

Read from socket failed: Operation timed out
kristof@zoon:/usr/home/kristof$

root# tcpdump -i gif0
tcpdump: WARNING: gif0: no IPv4 address assigned
tcpdump: listening on gif0
22:04:57.114103 3ffe:8100:100:a::1459.1203 > oerbier.ssh: S
1763530512:1763530512(0) win 65535 <mss 1220>
22:04:57.338846 oerbier.ssh > 3ffe:8100:100:a::1459.1203: S
1655592702:1655592702(0) ack 1763530513 win 5760 <mss 1440>
22:04:57.338951 3ffe:8100:100:a::1459.1203 > oerbier.ssh: . ack 1 win
65535
22:04:57.553258 oerbier.ssh > 3ffe:8100:100:a::1459.1203: P 1:24(23) ack
1 win 5760
22:04:57.553862 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P 1:52(51) ack
24 win 65535
22:04:57.761887 oerbier.ssh > 3ffe:8100:100:a::1459.1203: . ack 52 win
5760
22:04:57.761994 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P 52:684(632)
ack 24 win 65535
22:04:57.772179 oerbier.ssh > 3ffe:8100:100:a::1459.1203: P 24:664(640)
ack 52 win 5760
22:04:57.871690 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P 684:708(24)
ack 664 win 65535
22:04:58.050303 oerbier.ssh > 3ffe:8100:100:a::1459.1203: . ack 684 win
6952
22:04:58.080539 oerbier.ssh > 3ffe:8100:100:a::1459.1203: . ack 708 win
6952
22:04:58.089565 oerbier.ssh > 3ffe:8100:100:a::1459.1203: P 664:944(280)
ack 708 win 6952
22:04:58.107969 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P 708:980(272)
ack 944 win 65535
22:04:58.367059 oerbier.ssh > 3ffe:8100:100:a::1459.1203: . ack 980 win
8216
22:04:58.722804 oerbier.ssh > 3ffe:8100:100:a::1459.1203: P
944:1536(592) ack 980 win 8216
22:04:58.760698 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P 980:996(16)
ack 1536 win 65535
22:04:58.960352 oerbier.ssh > 3ffe:8100:100:a::1459.1203: . ack 996 win
8216
22:04:58.960470 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P 996:1044(48)
ack 1536 win 65535
22:04:59.157948 oerbier.ssh > 3ffe:8100:100:a::1459.1203: . ack 1044 win
8216
22:04:59.159566 oerbier.ssh > 3ffe:8100:100:a::1459.1203: P
1536:1584(48) ack 1044 win 8216
22:04:59.159876 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1044:1108(64) ack 1584 win 65535
22:04:59.391087 oerbier.ssh > 3ffe:8100:100:a::1459.1203: P
1584:1664(80) ack 1108 win 8216
22:04:59.481732 3ffe:8100:100:a::1459.1203 > oerbier.ssh: . ack 1664 win
65535
22:05:02.791756 3ffe:8100:100:a::1459 > oerbier: icmp6: neighbor sol:
who has oerbier
22:05:03.791792 3ffe:8100:100:a::1459 > oerbier: icmp6: neighbor sol:
who has oerbier
22:05:04.791794 3ffe:8100:100:a::1459 > oerbier: icmp6: neighbor sol:
who has oerbier
22:14:57.453557 oerbier.ssh > 3ffe:8100:100:a::1459.1203: F 1664:1664(0)
ack 1108 win 8216
22:14:57.453650 3ffe:8100:100:a::1459.1203 > oerbier.ssh: R
1763531620:1763531620(0) win 0
22:15:02.800820 3ffe:8100:100:a::1459 > oerbier: icmp6: neighbor sol:
who has oerbier
22:15:03.800822 3ffe:8100:100:a::1459 > oerbier: icmp6: neighbor sol:
who has oerbier
22:15:04.800862 3ffe:8100:100:a::1459 > oerbier: icmp6: neighbor sol:
who has oerbier



root# tcpdump -i tun0 | grep oerbier
tcpdump: listening on tun0
22:04:57.114122 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: S
1763530512:1763530512(0) win 65535 <mss 1220> (encap)
22:04:57.338793 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: S 1655592702:1655592702(0) ack 1763530513
win 5760 <mss 1440> (encap)
22:04:57.338973 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: .
ack 1 win 65535 (encap)
22:04:57.553198 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: P 1:24(23) ack 1 win 5760 (encap)
22:04:57.553886 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1:52(51) ack 24 win 65535 (encap)
22:04:57.761822 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: . ack 52 win 5760 (encap)
22:04:57.762018 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
52:684(632) ack 24 win 65535 (encap)
22:04:57.772099 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: P 24:664(640) ack 52 win 5760 (encap)
22:04:57.871720 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
684:708(24) ack 664 win 65535 (encap)
22:04:58.050246 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: . ack 684 win 6952 (encap)
22:04:58.080478 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: . ack 708 win 6952 (encap)
22:04:58.089500 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: P 664:944(280) ack 708 win 6952 (encap)
22:04:58.107993 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
708:980(272) ack 944 win 65535 (encap)
22:04:58.366976 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: . ack 980 win 8216 (encap)
22:04:58.722732 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: P 944:1536(592) ack 980 win 8216 (encap)
22:04:58.760724 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
980:996(16) ack 1536 win 65535 (encap)
22:04:58.960263 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: . ack 996 win 8216 (encap)
22:04:58.960497 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
996:1044(48) ack 1536 win 65535 (encap)
22:04:59.157868 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: . ack 1044 win 8216 (encap)
22:04:59.159513 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: P 1536:1584(48) ack 1044 win 8216 (encap)
22:04:59.159901 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1044:1108(64) ack 1584 win 65535 (encap)
22:04:59.391002 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: P 1584:1664(80) ack 1108 win 8216 (encap)
22:04:59.481769 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: .
ack 1664 win 65535 (encap)
22:05:02.791785 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459 > oerbier: icmp6:
neighbor sol: who has oerbier (encap)
22:05:03.791830 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459 > oerbier: icmp6:
neighbor sol: who has oerbier (encap)
22:05:04.791827 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459 > oerbier: icmp6:
neighbor sol: who has oerbier (encap)
22:05:37.884579 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:05:38.882333 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:05:40.882337 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:05:44.882429 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:05:52.882535 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:06:08.882758 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:06:40.883278 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:07:44.884255 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:08:48.885125 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:09:52.886169 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:10:56.887178 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:12:00.888101 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:13:04.889068 3ffe:8100:100:a::1459.1203 > oerbier.ssh: P
1108:1268(160) ack 1664 win 65535
22:14:08.889999 3ffe:8100:100:a::1459.1203 > oerbier.ssh: R 1268:1268(0)
ack 1664 win 65535
22:14:57.453481 cisco-nas6.be.wanadoo.com >
212-100-182-43.adsl.easynet.be: oerbier.ssh >
3ffe:8100:100:a::1459.1203: F 1664:1664(0) ack 1108 win 8216 (encap)
22:14:57.453671 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459.1203 > oerbier.ssh: R
1763531620:1763531620(0) win 0 (encap)
22:15:02.800856 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459 > oerbier: icmp6:
neighbor sol: who has oerbier (encap)
22:15:03.800850 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459 > oerbier: icmp6:
neighbor sol: who has oerbier (encap)
22:15:04.800899 212-100-182-43.adsl.easynet.be >
cisco-nas6.be.wanadoo.com: 3ffe:8100:100:a::1459 > oerbier: icmp6:
neighbor sol: who has oerbier (encap)

-- 
Kristof Verhenne | [EMAIL PROTECTED]
http://www.lugwv.be | http://www.bsdaemon.be
Running FreeBSD 4.5-PRERELEASE

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