On Thu, Mar 21, 2024 at 03:20:23PM +0100, Matus UHLAR - fantomas via
Postfix-users wrote:
> > Wietse Venema via Postfix-users:
> > > smtpd_discard_ehlo_keyword_address_maps =
> > > cidr:{ {!10/8 silent-discard,dsn} }
>
> On 23.02.24 11:12, Wietse Venema via Postfix-users wrote:
> > But that does not generalize to hosts with IPv4 and IPv6. In that case,
> > your approach will be more suitable.
Surely the generalisation is:
smtpd_discard_ehlo_keyword_address_maps =
cidr:{
{if 0.0.0.0/0}
# Private IPv4 addresses
{!10.0.0.0/8 silent-discard,dsn}
{!172.16.0.0/12 silent-discard,dsn}
{!192.168.0.0/16 silent-discard,dsn}
{endif}
{if ::/0}
# Unique local, site and link local IPv6 addresses
{!fc00::/7 silent-discard,dsn}
{!fe80::/9 silent-discard,dsn}
{endif}
}
Each set of negative rules can be constrained to its address family by
enclosing it in an if..endif block.
--
Viktor.
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