This is probably a bug in the Linux HyperV Card driver.
Maybe it's MS job to correct this. I don't know who has responsibility on this
package.
But, I confirm it is not a bug in the guest hyperV system or windows. I have
ipv6 windows servers (multiple versions) and they all work correctly with
Spotted, sorry :)
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Title:
Hyper-V NIC cannot pass IPv6 UDP packets by default until protocol
offload is disabled
To manage notifications about
Sorry, on my previous post, I forgot to copy paste this fail before setting
offload off:
Also, I didn't find where to add the tag kernel-bug-exists-upstream ??
root@Client:/# dig @2001:660:660c:120::2000 testubuntu NS
; <<>> DiG 9.10.3-P4-Ubuntu <<>> @2001:660:660c:120::2000 testubuntu NS
; (1 s
On "client" and "server":
Setting up linux-headers-4.6.0-040600 (4.6.0-040600.201605151930) ...
Setting up linux-headers-4.6.0-040600-generic (4.6.0-040600.201605151930) ...
Setting up linux-image-4.6.0-040600-generic (4.6.0-040600.201605151930) ...
root@Server:/# uname -a
Linux Server 4.6.0-04060
This issue could exist since a long time. Having only 3 servers, each
nameserver, did hide the problem (as each could resolve)
In my numerous tests, I made a virtual machine using an old Ubuntu server 15.04
and the problem was present. But,in the meanwhile, my bind server was having
troubles (rx
root@Client:/home/ssi# uname -a
Linux Client 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
root@Client:/home/ssi# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:Ubuntu 16.04 LTS
Release:16.04
Codename:
Hi ! I'sorry but I can't apport-collect;
Due to ipv4 adress lack and network isolation, my servers are setup ipv6 only
and launchpad.net only resolves in ipv4
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Hi Robie,
Thanks for your reply. I'll do my best to be as clear as possible
First, I must say that I found how to resolve the problem in this thread:
http://ubuntuforums.org/showthread.php?t=1940190
That way, you'll have a better on where to search. Before answering your
request, remember that I
My previous message without trace wrapping
** Attachment added: "Previous message without trace wrap.txt"
https://bugs.launchpad.net/ubuntu/+source/bind9/+bug/1584042/+attachment/4671163/+files/Previous%20message%20without%20trace%20wrap.txt
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== TcpDump =
from the client
root@14Ext-NS:~# tcpdump host 14Ext-Code.dr14.cnrs.fr -v
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 262144
bytes
18:27:46.837544 IP6 (flowlabel 0x9a4b5, hlim 64, next-header UDP (17) payload
length: 50) 14Ext-Code.
Hi back.
I (really) quickly set up 2 virtual machines on my HyperV cluster. Each With
ubuntu OOB iso image, one in 15.10, one in 16.04. No extra setup, only ipv6
adresses.
I attached the result.
I'll post some tcpdump in a few minutes
** Attachment added: "Screen capture of both servers"
htt
Hi, thanks for reading.
You are right, this is not a bind issue. It appears with ntp also.
I spoke about resolv.conf because it masked me the problem: it contains my 3
nameservers
But As I mentioned, when one server tries resolving using itself, if works.
That's why I noticed lately the problem w
PS : If you can reaffect this bug report to the right package, thanks
for that. I haven't found how to get more generic ...
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Title:
IPV6 resolvin
The same with ntp:
@client:~# ntpdate aaa.bbb.ccc.188
24 May 12:56:09 ntpdate[26846]: adjust time server aaa.bbb.ccc.188 offset
0.083226 sec
@client:~# ntpdate :::188
24 May 12:56:38 ntpdate[27174]: no server suitable for synchronization found
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Just to add a point about how I noticed the bug. It as one important
information.
I have 3 nameservers, all ipv6/4. No particular problem.
Problem occurred when I added a 4th Ubuntu server. This one installs fine as I
set ip IPv4 first with the 3 nameservers ipv4 address. But, when I added the
i
Sorry, i'm tired, here is the link:
https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1527902
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Title:
IPV6 resolving fails via udp
One colleague, linux expert, pointed me to this : #1527902
he did some strace and find :
60735 gettimeofday({1463755505, 995830}, NULL) = 0
60735 sendmsg(20, {msg_name(28)={sa_family=AF_INET6, sin6_port=htons(53),
inet_pton(AF_INET6, "2001:660:660c:120::226", &sin6_addr), sin6_flowinfo=0,
sin6_
Public bug reported:
Hi,
On a client server, I can't get a response from a name server in ipv6+udp. On
the same server, it works fine in tcp.
If I log on my name server, I can get a response from himself but, as a client,
it can't get a response from another name server.
here are the steps to
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