On 15/10/19 3:05 pm, Karl Auer wrote:
> Had an interesting (to me) case last week. Client rang on his mobile to
> say his phones didn't work and also he couldn't get to his bank or
> anything else - except Google. Also, I found I was able to use
> TeamViewer to access one of his PCs.
>
> He's on NBN over FTTC (or maybe FTTN) with Telstra.
>
> Turned out his Telstra router was supplying a valid prefix to
> autoconfigure IPv6 addresses in, but it was not supplying IPv4
> addresses via DHCP. Reset the router and it all came good.
>
> This is the first time I've seen this in the wild where it was not a
> misconfiguration (though I'm the first to admit that "the wild" is more
> of an inoffensive thicket in my case). Is it more common than I think?
A few years back we had some DHCP issues with our office networks, more
than once my laptop lost IPv4 and it would often take hours to notice as
all our internal services were v6 enabled.
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