block IP's in same zone

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block IP's in same zone

L4 Transporter

Is it possible or practical to block traffic between two server in the same firewall zone by designating the source IP from the server you want to block access to the server to the destination server indicated by IP


@rmfalconer @OtakarKlier @reaper

Do you have to be very specific? like

source - server 1 

Source zone - myhouse

destination - server 2

destination zone - myhouse


And have you used this on your firewall? Also I if I read this correctly that if I have the rule type set to universal,which I do, it should cover both interzone and intrazone


It's essentially built out exactly the same as you would a normal security policy, the 'to' and 'from' are just going to be exactly the same. 


You can leave the rule type as universal or set it to intrazone, both would function the same. 


From what read I was under the same impression.  i guess i could move my server to another security zone but thats not assurrance either without making sure of how everything is routed  and aggregated etc

Hello @jdprovine,

As for the IP's, no they do not have to be specific if you dont want then to be. I have a zone called DMZ, then I carve out subnets out of it. Since I have a DENY ALL rule before the built in allow intra zone traffic, it will automatically be blocked and then I can chose what is allowed to talk to what. So instead of using specific IP's you can use Subnets.


source zone = DMZ

source IP =

destination zone = DMZ

destination IP =


Hope that makes sense.

Just checking.... But the server Default gateways are the firewall not something else?

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