On 2024-06-25 12:00, hp--- via dovecot wrote:
I am running Dovecot 2.3.21. One client has multiple computers in their
LAN, connecting to my server with a static IP.
One or several computers in that LAN keep logging in with failed
password, but the Dovecot log only shows the public static IP, like this
Jun 25 10:39:20 server-name dovecot[689]: imap-login: Disconnected:
Connection closed (auth failed, 2 attempts in 62 secs):
user=<x...@domainyyy.com>,
method=PLAIN, rip=client-public-IP, lip=server-IP, TLS,
session=<MCLxoK4bksIO8zXR>
I tried to enable debug, but there is no more information about the LAN
IP or computer names. Is there any setting which helps me with that
purpose? So it will be much easier to locate the failed computers in
that LAN?
Technically, there's no way for Dovecot to know what the client's LAN IP
address is, at least not without the client providing this information
(which it won't).
Some IMAP clients send IMAP ID commands to the server. This usually
includes the name (e.g. "iPhone Mail", "Microsoft Outlook", etc) and
version of the client, and you can have Dovecot log this to your log by
setting the option:
imap_id_log = *
This might help you identify the misconfigured clients.
Not all clients send IMAP ID commands though, and some clients only send
it *after* authenticating, in which case you won't see it in your situation.
- Eirik
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