topic Re: Undecided application in Next-Generation Firewall Discussions

Undecided application

gdu_palo — Mon, 28 Sep 2026 06:46:56 GMT

In our environment, some webpages are not accessible. (This site can’t be reached) When I monitor the session browser, there is "undecided" in the Application column. I have attached the screenshot.

Please help me to solve this issue.

Re: Undecided application

Raido_Rattameister — Mon, 28 Sep 2026 18:20:36 GMT

If you go and look up same session from traffic log after it ended.

What is count of "packets sent" and "packets received"?

Re: Undecided application

PavelK — Mon, 28 Sep 2026 22:17:40 GMT

Hello @gdu_palo

only to expand on the answer provided by Raido, here is the official KB: Why do Sessions Show Application "Undecided" When in ACTIVE State but have an App When Moved to DISCARD State?. Since you mentioned in your post that a site is not responding it makes sense that the application is undecided in the active session. If there is no response from the website the Firewall does not have enough traffic to determine the app-id. Once the session is terminated you can find further details in the log. If traffic logs reveal Bytes Received are 0, then the site might have blocked your egress IP address because of poor reputation, IP whitelisting, GEO restrictions or excessive API access/rate limit on site.

Kind Regards

Pavel

Re: Undecided application

gdu_palo — Thu, 01 Oct 2026 06:03:05 GMT

Thank you for your reply.
Sending packets:
c2s total bytes: 264
c2s packets: 4
Received packets:
s2c total bytes : 0
s2c packets : 0

The session remains:

c2s state: INIT
s2c state: INIT
application: incomplete
end-reason: aged-out

Re: Undecided application

gdu_palo — Thu, 01 Oct 2026 08:05:05 GMT

Thank you for your response.
I connected to the Internet directly with the cable that the ISP provided. (Before the firewall device). I checked the required websites and determined that all of them are blocked from the outside. I asked the ISP to check on their side.
Thank you for your support and instruction.