On 04/10/2024 19:04, Johnnie W Adams via Exim-users wrote:
> The SIEM claims that ports 587 and 465
> are generating traffic on a high-numbered port.
Urghh. Ports don't generate traffic.
Sockets are endpoints for traffic, TCP-using sockets
have connections which each have two ports, a local
and a remote - and was initiated from one of those two.
A TCP connection has packets flowing in both directinos
(in general).
What does this SIEM actually mean, in its claim?
On logging: Exim itself is reliable in my experience.
A configuration that does (or not) log certain classes
of info might trip up your assumptions.
External factors such as (syslog...) logging to an
overburdened destination, or log-rotation errors,
can result in lossage.
--
Cheers,
Jeremy
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