scan-host sweep

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scan-host sweep

L4 Transporter


Under threat detection, scan host sweep  droped some traffic. And under the rules it did not show anything .

What does it mean



L3 Networker



Do you have a zone protection profile configured and you have configured an action for the host sweep scan?


Best Regards,



Cyber Elite
Cyber Elite

You probably have zone protection enabled

'host sweep' is a reconnaissance attack where a host 'scans' several of your ip addresses



zone protection.png

Tom Piens
PANgurus - (co)managed services and consultancy


what is the interval and Threshold here .

how a zone protection profile integrated with a zone ?

for example if we have zone trust,server , how we assign the profile to the zone .

What if we change  from the block to alert ? .


Threshold is the number of events in the interval amount of time
So 100 hosts touched in 2 seconds for example
Zone protection is global for all traffic hitting a destination zone

If you need to be more granular, to protect a single server's resources for example, you should use a DOS policy

If you set action alert instead of block, you will simply see a log entry for each 'scan' but no action is taken
Tom Piens
PANgurus - (co)managed services and consultancy

Hi Reaper,


As far as I remember "Zone Protection Profile" applies on source zone not on destination zone, correct me if I am wrong.


Best Regards,



Community Team Member

Hi @fozail,


Zone protection profile is designed to provide broad-based protection at the ingress zone (i.e. the zone where traffic enters the firewall) and is not designed to protect a specific end host or traffic going to a particular destination zone.   Use the DoS protection rulebase to match on a specific zone, interface, IP address or user.


Cheers !


LIVEcommunity team member, CISSP
Don't forget to hit that Like button if a post is helpful to you!

Hi Kim,


Yes, you are correct. I got confused as per other description where it is mentioned that "zone protection is for destination zone".


Thank you for the clarification.

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