[Dovecot] Dovecot and loadbalancer

[Cyril Feraudet]

Hi all,


I've 4 servers with dovecot and ldap authentication behind a  
loadbalancer (Alteon).

To connect to dovecot, client need to use a vip of the loadbalancer.

To connect to the ldap server, dovecot need  to use the loadbalancer  
cause there are several ldap server.

The loadbalancer close a connection without activity during 30mn

Dovecot lauch several authentication process who have a connection to  
the ldap server each.

Each client (user) have several imap connection to dovecot.

I've 2 problemes :

- If a client (thunderbird for ex.) don't use a connection during  
30mn, the loadbalancer delete this connection from his connection  
table and the client seem not able to correctly reopen another

- If a dovecot authentication proccess want to request ldap but  
haven't do it in the last 30mn, it fail an say that the  
authentification fail.


Somebody have already use dovecot in a redundent environnement ?

Have you an idea to solve these problems


Thanks,

Cyril Feraudet