On Tue, 24 Jun 2003, Colm MacCarthaigh wrote:
> > I *think* the latest IPv6 thinking deprecates this approach,
>
> I think there's an element of confusion here.
I *know* there's an element of confusion here! And I know exactly where
it is too... :-)
> But it's important to note, that even if you listen on two seperate
> sockets, and set the IPV6_ONLY socket option and so on, there's
> still nothing to stop IPv4-mapped addresses coming in via the
> the IPv6 socket. They are valid IPv6 addresses, and it's possible
> something further up the chain could be performing the translation.
I think Exim is OK on this; it just converts them into IPv4 addresses
when trying to compare with IPv4 addresses in blocking lists, etc.
Thanks for the clear explanation. I'll try to become less confused.
Philip
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
Get the Exim 4 book: http://www.uit.co.uk/exim-book
