Hi guys,
I have a very weird scenario and I can not get an explanation by myself.
I want to isolate VLANs so I can block or allow the communication between VLANs.
In my test scenario I made the following:
My Computer: VLAN 1
My Handy: VLAN 2
I made a Firewall Rule ICMPv4 block from VLAN 1 to VLAN 2.
Picture 1: The rule seems to work and the ICMPs are blocked.
Picture 2: I allow the rule and the ICMP goes through.
Picture 3: When I change the rule again, no more packets are blocked.
Can please someone explain me, why it doesn't work anymore and how can I configure inter-VLAN Firewall.
I know this document: https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Using_Layer_3_Firewal...
But it seems to work only one time...
Thanks and regards,
Jonathan
Just to confirm, is the MX the default gateway for both VLANs?
Yes
Have you ever tried to create an inboung rule instead of an outbound rule?
you should wait like 10 minutes, and not generate any traffic on the tcp/udp port or in this case icmp
Changes to current flows are not reflected by blocks, only new flows. Or if you stop the ping and restart it, is it still allowed?
Thanks guys, will try right now 😉