Re: question to stf interface (current)

[6bone%6bone.informatik.uni-leipzig.de@localhost]

On Sun, 31 May 2015, Christos Zoulas wrote:

> Let's keep monitoring it, and perhaps we can run a tcpdump to capture the
> exact packet and see what it contains...

It took some time, but now I, I identified the packets. Responses to DNS 
requests generate error messages. There are only DNS replies affected 
which are sendet to 2002::/16 addresses.

For Exmaple:

14:22:19.482338 AF IPv6 (24), length 551: (hlim 64, next-header UDP (17) 
payload length: 507) 2001:638:902:1::10.53 > 
2002:d9f5:7de1:8000:3631:c4ff:fef3:6b3d.51711: [udp sum ok] 47776| q: A? 
au.download.windowsupdate.com. 10/7/0 au.download.windowsupdate.com. 
[37m57s] CNAME audownload.windowsupdate.nsatc.net., 
audownload.windowsupdate.nsatc.net. [7m56s] CNAME au.au-msedge.net., 
au.au-msedge.net. [1m] CNAME au.c-0001.c-msedge.net., 
au.c-0001.c-msedge.net. [34s] CNAME au.c-0001.e-msedge.net., 
au.c-0001.e-msedge.net. [4m] CNAME 
edgereturn.audownload.windowsupdate.nsatc.net., 
edgereturn.audownload.windowsupdate.nsatc.net. [10m] CNAME 
edgehop.audownload.windowsupdate.nsatc.net., 
edgehop.audownload.windowsupdate.nsatc.net. [10m] CNAME 
au.download.windowsupdate.com.edgesuite.net., 
au.download.windowsupdate.com.edgesuite.net. [3m15s] CNAME 
a767.dscd.akamai.net., a767.dscd.akamai.net. [20s] A 212.201.100.136, 
a767.dscd.akamai.net. [20s] A 212.201.100.135 ns: dscd.akamai.net. 
[31m17s] NS n5dscd.akamai.net., dscd.akamai.net. [31m17s] NS 
n7dscd.akamai.net., dscd.akamai.net. [31m17s] NS n2dscd.akamai.net., 
dscd.akamai.net. [31m17s] NS n6dscd.akamai.net., dscd.akamai.net. [31m17s] 
NS n0dscd.akamai.net., dscd.akamai.net. [31m17s] NS n1dscd.akamai.net., 
dscd.akamai.net. [31m17s] NS n3dscd.akamai.net. (499)
14:22:19.538227 AF IPv6 (24), length 551: (hlim 64, next-header UDP (17) 
payload length: 507) 2001:638:902:1::10.53 > 
2002:d9f5:7de1:8000:3631:c4ff:fef3:6b3d.51711: [udp sum ok] 60014| q: A? 
au.download.windowsupdate.com. 10/7/0 au.download.windowsupdate.com. 
[37m57s] CNAME audownload.windowsupdate.nsatc.net., 
audownload.windowsupdate.nsatc.net. [7m56s] CNAME au.au-msedge.net., 
au.au-msedge.net. [1m] CNAME au.c-0001.c-msedge.net., 
au.c-0001.c-msedge.net. [34s] CNAME au.c-0001.e-msedge.net., 
au.c-0001.e-msedge.net. [4m] CNAME 
edgereturn.audownload.windowsupdate.nsatc.net., 
edgereturn.audownload.windowsupdate.nsatc.net. [10m] CNAME 
edgehop.audownload.windowsupdate.nsatc.net., 
edgehop.audownload.windowsupdate.nsatc.net. [10m] CNAME 
au.download.windowsupdate.com.edgesuite.net., 
au.download.windowsupdate.com.edgesuite.net. [3m15s] CNAME 
a767.dscd.akamai.net., a767.dscd.akamai.net. [20s] A 212.201.100.135, 
a767.dscd.akamai.net. [20s] A 212.201.100.136 ns: dscd.akamai.net. 
[31m17s] NS n2dscd.akamai.net., dscd.akamai.net. [31m17s] NS 
n6dscd.akamai.net., dscd.akamai.net. [31m17s] NS n4dscd.akamai.net., 
dscd.akamai.net. [31m17s] NS n7dscd.akamai.net., dscd.akamai.net. [31m17s] 
NS n5dscd.akamai.net., dscd.akamai.net. [31m17s] NS n3dscd.akamai.net., 
dscd.akamai.net. [31m17s] NS n1dscd.akamai.net. (499)


dmesg reports:

Jun 10 14:22:19 gate /netbsd: nd6_storelladdr: bad gateway address type 
inet6: 2002:8b12:1921:: for dst 2002:d9f5:7de1:8000:3631:c4ff:fef3:6b3d 
through interface vlan404

the DNS server runs on the computer with the STF interface.

stf0: flags=1<UP> mtu 1280
        inet6 2002:8b12:1921:: prefixlen 16

ixg0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        capabilities=fff80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx>
        status: active
        inet 139.18.25.33 netmask 0xfffffff8 broadcast 139.18.25.39
        inet alias 139.18.25.34 netmask 0xffffffff broadcast 139.18.25.34
        inet alias 192.88.99.1 netmask 0xffffffff broadcast 192.88.99.1
        inet6 fe80::a236:9fff:fe27:4330%ixg0 prefixlen 64 scopeid 0x1
        inet6 2001:638:902:1::1 prefixlen 64
        inet6 2001:638:902:1::10 prefixlen 128


vlan404: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        capabilities=7ff80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx>
        vlan: 404 parent: ixg0
        inet6 fe80::a236:9fff:fe27:4330%vlan404 prefixlen 64 scopeid 0xf
        inet6 2001:638:c:a00a::2 prefixlen 64


and the routing table:

IPv4
default            139.18.25.38       UG          -        -      -L ixg0

IPv6
default                            2001:638:c:a00a::1             UG 
-        -      -  vlan404



Any ideas what could be the problem?


Regards
Uwe