AWS - Availability Zones - Palo Alto Location

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AWS - Availability Zones - Palo Alto Location

Hi,

 

I am looking at deploying the VM-Series into AWS to replace an existing deployment of Sophos UTMs. But can someone help tell me if I am going mad, or have found a limiation. The VM-Series would be used for egress traffic only, and we dont have tight SLA's so ideally a single VM FW will sort us out.

 

If I deploy a single VM-Series into say Availability Zone-1B, and some other hosts are also in the same AZ, now I can route all my traffic to the VM-Series FW and egress out to the web. All happy.

 

If I do the same have a VM-Series in 1B, but have some clients in AZ-1C, they cannot route out to the internet. I can see the traffic is hitting the firewall on the Monitor tab of the Firewall, but that is about as far as it gets.

 

Is there some horrible limitation where these firewalls can only route traffic if they are in the same AZ as the client?

 

With the Sophos UTM this has never been an issue before, whatever you point at it from whatever location it will just route out to the web. 

 

Of course could be I am doing something really stupid as well :-)

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