Can I check if a connection was dropped by the firewall?

pieters — Thu, 01 Oct 2009 13:04:47 GMT

I frequently have people coming to me asking if I can check if a connection is dropped on the firewall.

Allow me to give you an example:

We have a trunk setup between a cisco callmanager and one from Alcatel. All traffic between the 2 systems flows through the Palo Alto's.

When someone calls from a phone connected to the Alcatel callmanager and calls another user on a phone connected to the cisco callmanager, the call is disconnected exactly after 40 minutes, every single time.

Question is, is there a way for me to show that this connection is or is not dropped by the firewall?

I know I can change the default timeouts for the apps but this is not what I'm looking for.

I also have another issue with an rsh connection where I have increased the default timeout in the appID but still any rsh session that s longer that 108 seconds gets dropped.

As long as I can't show that it is not the firewall, I'm stuck with a case of guilty till proven innocent 😞

I hope someone out there can shed some light on this.

Re: Can I check if a connection was dropped by the firewall?

migration — Wed, 14 Oct 2009 15:46:54 GMT

I would do a 'sh session info' to confirm that all of your timeouts are set properly.

Then I would do a 'show log traffic action equal drop' and use the source or destination to see what the log is showing.

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Can I check if a connection was dropped by the firewall?

Re: Can I check if a connection was dropped by the firewall?