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Topics - AndrewButterworth

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For a few days (I think?) Windows Server 2012 R2, Windows Server 2016 and Windows 10 machines are failing to connect to Windows Update over IPv6.  I get a couple of different errors but looking at the logs it appears it is timing out on connecting to the Windows Update services over IPv6.
If I disable IPv6 and force them to use IPv4 Windows Update works fine.  There are a bunch of DNS AAAA records and Aliases that get resolved so I am not sure which hosts they are failing to connect to.  Connections to other IPv6 sites seem to work fine (google, cisco).
My IPv6 tunnel terminates on the Paris server so was wondering if this is anything related to the hardware failure the other week and the temporary terminating of the Paris tunnels in London?


Questions & Answers / Paris server down?
« on: October 31, 2017, 03:51:41 AM »
Any ideas when the Paris server will be back up?  31-10-2017?

IPv6 on Routing Platforms / IPv6 access to issues?
« on: October 02, 2014, 04:16:50 AM »
I have an interesting issue at home with my IPv6 access.  I have had a tunnel to HE for over 2-years now; all working fine.  I had some initial MTU issues that I have sorted out but on the whole its been working well.  When I originally signed up the tunnel server in London was full (I am in the UK) so I opted for the geographically nearest which was France.  I have a routed /64 & a /48 and I have 'subnetted' the /48 down into various /64's that I have over various VLANs at home and I as say it all seems to work perfectly.  I am using a Cisco 887VA router on a BT Infinity VDSL2 circuit which trains at about 50Mbps down and 5Mbps up.  The only issue I have had is and redirecting me to the and due to my source IPv6 address.
Nothing has changed on my side for ages but about two or three weeks ago access to began to be a bit erratic - pages would half load and stop, clicking on links would time out etc.  By default (using Windows GPO) I use a dual-stack IPv4/IPv6 Squid proxy server to access Web sites, however I also have an IPv4-only proxy so forcing my client to use this solves the issue by forcing an IPv4 connection to instead of the default IPv6 connection - I manually change the proxy in the Browser to the IPv4-only proxy but GPO refreshes at regular intervals so this reverts every 90-minutes (default GPO refresh).  Connecting to other sites over IPv6 is fine -,,, etc plus anything I search for with 'ipv6 only sites'.
I access a lot as I use it daily in my job so this is beginning to get a pain.  What's odd is it seems to be worse in the morning and then recover in the afternoon without any intervention.

Any ideas?


Questions & Answers / /48 Zone remains as Incomplete?
« on: March 24, 2012, 03:36:27 PM »
From the Hurricane Electric Free DNS Management I have activated my /64 DNS Zone but can't activate my /48.  The help says click on it and it will automatically activate it?  Is there something I am missing?


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