On Wed, 20 Dec 2023 17:14:05 +0100 Marco Moock <m...@dorfdsl.de> wrote:
> Am 20.12.2023 um 15:58:48 Uhr schrieb Joe: > > > For many years my SMTP server has requested an ident (TCP port 113) > > from outside sending servers. Since nobody now runs ident servers, > > there will be no reply, and my server waits for a timeout of thirty > > seconds before continuing. > > Good admins don't use DROP in firewalls, so either you get a TCP RST > (because no application listens on that port) or a ICMP > administratively prohibited, so your server knows that no identd runs > there and can continue. > I'm not actually looking for an ident reply, I'm looking to hold up the transaction for thirty seconds to weed out the spambots. This is a convenient way to do it. I mentioned it after the practice of ignoring the first SMTP contact was referred to, to achieve more or less the same thing. -- Joe
