Session length calculation - PaloAlto

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Session length calculation - PaloAlto

L0 Member

Hello,

 

does anybody know, how exactly the Session length for a session is calculated in PAN-OS?
Is it depended on the system time?
--> Would my TTL decrease if the system time changes and therefore reset my TCP session if the threshold of the TTL is reached (Or aged-out with UDP)?

Regards,

Eric

7 REPLIES 7

Cyber Elite
Cyber Elite

@eric_moore,

I'm not positive on this, but I'm assuming that the TTL is actually handled on Epoch time like most session related networking hardware.

L1 Bithead

@eric_moore wrote:

Hello,

 

does anybody know, how exactly the Session length for a session is calculated in PAN-OS?
Is it depended on the system time? 
--> Would my TTL decrease if the system time changes and therefore reset my TCP session if the threshold of the TTL is reached (Or aged-out with UDP)?

Regards,

Eric


Select Rematch all sessions on config policy change to apply newly configured Security policy rules to sessions that are already in progress. This capability is enabled by default. If you clear this check box, any policy rule changes you make apply only to sessions initiated after you commit the policy change.

L5 Sessionator

The bot accounts in the PA forums are really getting out of control. New user "Kuhic567":

- account created 2022-02-14

- 02-15 makes reply post on 2 month old thread that is direct quote from a third party article searched by keyword

- 02-15 makes reply post that is direct quote from Cisco forum

- 02-25 makes giberish reply post

 

$10 says that tomorrow morning the new account edits the above post to include a spam/phishing link.

L0 Member

I researched the toppic a little bit further.
Some vendors implemented a function to mitigate a session timeout problem.
They implemented some sort of dif. time value to the Epoch time after a big time change.
I wasn't able to find any documentations from palo if this feature is present in PAN-OS.
(@Adrian: You lost 10 bucks 😄

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