On Thu, 11 Jan 2007, David Strom wrote:

We have an app server connecting to a MySQL DB server in a different subnet. The TCP Session timeout keeps cutting off the app server from the DB server. We have reasons to put these 2 systems in different subnets, I won't bore you with those details.

Is there a way to set the TCP Session timeout for this service to "infinite"? I.e., no timeout? Checkpoint tech support says no, that setting the timeout to Zero is not saying "no timeout" for this service, and the max number of seconds I can set in the service seems to be 9999.

From a practical point anything statefull without a timeout is a DoS
grabbing point. If some types of sessions never timeout you can always DoS a firewall. You can do it slowly so no other trap is triggered and in the end your firewall is toast.

Any network application that assumes it can remain active forever without a proper keepalive mechanisme is broken by design and not made for this century.

Having said all that I think that a proper +2 hours settings should work unless you application is not behaing itself.

Hugo.

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