Client hanging up : problem found

[Ghislain ADNET]

Hi,

  I have solved the problem i had with the client hanging trouble on our 
new cyrus imapd server.
 
  The problem is not cyrus related but i share here so other can benefit 
from my story.

Symptom:

  Client hang after some time, the connexion time out and the server 
close the connection because of "too much idle time".
  All fiddling with timeout and idle settings on the server do not 
change a thing.

Solution:

  Our server as in front of it a firewall that was in "allow All" to the 
imap and from the imap server. BUT some firewalls even if you tell them 
to not touch anything concerning the traffic still shutdown any 
connections after some amount of time. In our case you have to click in 
the advance tab where we found a "timeout"  and change the timeout from 
5 to 31 minutes.

   This solved every problem we had. So what we learned in that is : 
Don't assume anything, telling all is open do not mean on all firewalls 
that he must not touch the traffic for this case and you have to review 
ALL the settings it offer :-)

  I hope this can help some people :)

Best regards,
Ghislain.
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