Dňa 12. mája 2023 4:07:51 UTC používateľ Lena--- via Exim-users
<exim-users@lists.exim.org> napísal:
>How do you know that connection is held open and timeout happens?
From logs, eg:
2023-05-12 00:45:57 H=[52.176.51.76] Connected CC=US con=1
2023-05-12 00:46:06 dovecot_login authenticator failed for ([52.176.51.76])
[52.176.51.76]: 535 Incorrect authentication data (set_id=...)
2023-05-12 00:47:06 SMTP command timeout on TLS connection from
([52.176.51.76]) [52.176.51.76]
2023-05-12 00:47:06 H=[52.176.51.76] NotQ command-timeout CC=US EHLO,AUTH
And confirmed by netstat, when i am lucky to watch it
in that time...
>I seldom see that in my logs.
>During last 30 days I see (logged in notquit ACL)
>3867 connection-lost and 63 command-timeout events
My numbers/ratio are opposite.
I initially blame my FW, which block these attempts, but
some time ago i moved that rule after ESTABLISHED accept
without significant ratio change, thus seems that FW is/was
not root of problems...
BTW, i have simillar ACL to drop on second login after
failed one (on the same connection), but these second
attempts are very rare here...
regards
--
Slavko
https://www.slavino.sk/
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