TCP SYN with data Threat logs

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Highlighted
L0 Member

TCP SYN with data Threat logs

Hi Guys,

 

I receive hundreds of TCP SYN with data Threat Alerts from my BYOD zone every day. I was learning more about it and I understood that it is a TCP syn packet with data in its payload. However, as almost all of them seems to come from non-malicious sources, I am not sure if I should worry about it or just consider it as a false positive and tweak my firewall.

Any advice would be much appreciated.

 

Thanks

 

Leandro Ramos

Highlighted
L6 Presenter

Re: TCP SYN with data Threat logs

If the firewall detects a TCP packet with data and your Zone Protection profile is set to drop these, then I wouldn't think it is a false positive. It triggers the protection because the firewall sees these.

 

More information available at:

https://www.paloaltonetworks.com/documentation/80/pan-os/newfeaturesguide/networking-features/zone-p...

 

There is currently no way to inhibit these protections from writing to the Threat Logs, however, if you receive the alerts through a Log Forwarding profile, you can edit the profile so that these are not forwarded out using a Filter in PAN-OS 8.0:

 

(severity eq informational) and (threatid neq 8723)

 

Selective Log Forwarding

https://www.paloaltonetworks.com/documentation/80/pan-os/newfeaturesguide/management-features/select...

 

Video Tutorial

https://live.paloaltonetworks.com/t5/Tutorials/Tutorial-Filtered-Log-Forwarding/ta-p/145950

Highlighted
L0 Member

Re: TCP SYN with data Threat logs

Hi Mivaldi,

 

Thank you very much for all the information provided.

 

Regards,

 

Leandro Ramos

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