Hi Gregor
Thank you for your insights.
On 02.03.21 20:51, Gregor Riepl wrote:
I tried different ISPs to which I have access and I can't establish a IPv6 connection to port TCP/443 to neither 2a02:a90:c400:4001::2 nor 2a02:a90:c400:5001::2 which seems the two loadbalancers responsible for www.swisscom.ch except from a Swisscom Business DSL connection.
Init7 -> fail Strange, from AS13030 (Fiber7 residential), both IPs work fine.
I just tried it again from a customer with a Fiber7 access and I still can't open www.swisscom.ch neither in a browser edge / firefox on a windows machine, nor from wget on a linux server.
Perhaps something is wrong with your test client? Wrong MTU? OS issue? Did you try a different machine?
I tried from various windows and linux machines from our office (via netrics), from customers (fiber7) and from our datacenter (nts) and it's all the same - I use different routers, different OS versions.
My datacenter ISP (nts) suspects that it's a reverse path issue and advised me to use atlas probes to confirm.
I made two mesurement but the results show more successes that failure:
https://atlas.ripe.net/measurements/29275604/#probes
https://atlas.ripe.net/measurements/29275617/#probes
So maybe it's really only me and I have to live with the fact that I can't login to the swisscom website when v6 connectivity is enabled.
Strange thing is that I even found a swisscom sme fiber customer where the connection to https://www.swisscom.ch times out and one on a ip-plus fiber access. Maybe that's my best bet to open a ticket with their support.
It would be so much easier to debug if their webserver would answer to pings on v6.
I'll keep the list updated if I have any relevant news.
Best Regards and thanks again to all of you who spend some time on this issue already
Jean-Pierre