On 2019/06/07 17:22, Aled Morris wrote: > I have customers with IPv6 dual stack and they are having intermittent > problems (SSL failure) > connecting to Santander's retail banking portal. > > Is there anyone from Santander (or with a contact in Santander) on this list? > > I'm wondering if the problem is related to this: > > > $ host retail.santander.co.uk > > retail.santander.co.uk is an alias for retail.lbi.santander.uk. > > retail.lbi.santander.uk has address 193.127.210.129 > > retail.lbi.santander.uk has IPv6 address ::ffff:193.127.210.129 > > > Aled >
They have been doing that since at least Oct 2017, probably earlier. I would have thought "happy eyeballs" in browsers would usually mask the problem though.
