Dovecot behind Load Balancer
jddupas at xooloo.com
Wed Jul 10 12:44:35 EEST 2019
> Le 10 juil. 2019 à 10:24, Paolo Daniele via dovecot <dovecot at dovecot.org> a écrit :
> Il 10/07/19 10:20, Aki Tuomi ha scritto:
>>> On 12/06/2019 20:02 Paolo Daniele via dovecot <dovecot at dovecot.org> wrote:
>>> i've a question for you.
>>> I've two dovecot imap/pop server behind a zen load balancer.
>>> Load balancing is made by lx4nat so the public ip address of my load balancer contact directly the dovecot servers.
>>> Since few months i've a message from thunderbird that i've reached the imap limit login for ip.
>>> I've triend to increase the max user ip parameter but sometimes i've the same problem.
>>> It's a strange things that actually i'm able to mitigate by reduce the number of cached connections in Thunderbird but it's not normal.
>>> What do you think about that?
>>> Maybe there's some tuning that you can suggest.
>>> Thank you,
>> Have you ensured, by checking logs, that the connections are seen by dovecot to come from public IP addresses?
>> Also, thunderbird is known to open lots of concurrent connections.
> connections are coming from the ip address of load balancer (also checked with a netstat -an)
If connection are seen as coming from the IP address of the load balancer, isn't it normal that dovecot complains ?
That means that dovecot sees all connections as coming from a single client, which would explain why you reach that limit.
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