Hello,
after what timeout time does Mikrotik drop NAT connections that had no traffic?
Is this timeout configurable?
Note: The topic is related to IMAP Idle connections which do not have any traffic for long periods.
Thanks,
Thomas
hello,
interesting 
i barely pay attention to that details 
did you host imap server internally or you were just asking about how long for your router to close your outgoing imap?
i myself prefer to choose idle time is set by the server.
but as for the MT firewall nat time out - maybe you can read some parameters on the wiki.
It is about Fetchmail which shall collect mails from a mailserver via IMAP IDLE (Push Notifications). This means that Fetchmail opens a connection to the mailserver and after starting the idle phase, there will be no communication unless the mailserver sends a notification about a newly received E-Mail. Usually, after a maximum time of 30 minutes the client and server will talk to each other again and going to idle again, afterwards.
The question here is, if the NAT on Mikrotik becomes a problem with a time of around 30 minutes with no communication on a specific NAT connection.
You can check the default tcp connection timeout in the documentation: https://help.mikrotik.com/docs/display/ROS/Connection+tracking
tcp-established-timeout (time; Default: 1d)
@ nescafe2002,
nice pointer. i didn’t notice that page👍🏻
@ thomas,
The question here is, if the NAT on Mikrotik becomes a problem with a time of around 30 minutes with no communication on a specific NAT connection.
maybe you can try to tune it by @ nescafe2002 pointer.