SASL LOGIN : connection to server lost with more than 10 simulatneaous postfix smtps

Vincent ETIENNE ve at vetienne.net
Thu Sep 4 19:30:01 UTC 2014



Le 04/09/2014 18:34, LuKreme a écrit :
> On 04 Sep 2014, at 03:12 , Ve (HOME) <ve at vetienne.net> wrote:
>> Postfix abort connection
> That sounds like postfix is rate limiting.
>
Maybe but the message log doesn't look like rate limiting
here is an example


Sep  2 16:01:05 ns3 postfix/smtpd[32576]: connect from
ns206843.ip-94-23-193.eu[94.23.193.183]
Sep  2 16:01:06 ns3 postfix/smtpd[32443]: connect from
LAubervilliers-656-01-128-94.w80-11.abo.wanadoo.fr[80.11.5.94]
Sep  2 16:01:06 ns3 postfix/smtpd[31906]: connect from
unknown[123.21.205.191]
Sep  2 16:01:09 ns3 postfix/smtpd[32600]: connect from
ns206843.ip-94-23-193.eu[94.23.193.183]
Sep  2 16:01:15 ns3 postfix/smtpd[32576]: warning:
ns206843.ip-94-23-193.eu[94.23.193.183]: SASL LOGIN authentication
failed: Connection lost to authentication server
Sep  2 16:01:15 ns3 postfix/smtpd[32576]: disconnect from
ns206843.ip-94-23-193.eu[94.23.193.183]
Sep  2 16:01:15 ns3 postfix/smtpd[32576]: connect from
ns206843.ip-94-23-193.eu[94.23.193.183]
Sep  2 16:01:15 ns3 dovecot: auth: Warning: auth client 0 disconnected
with 1 pending requests: EOF


What is strange ( at least for me ) is the 10 second delay between the
connect and the warning and that postfix log a connection lost.
And i have process_limt configured ( so 100 connection by default i think)

But will try to have more information


Vincent





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