topic Traffic flowing through Fw in Network Security

Traffic flowing through Fw

mahesh18 — Tue, 12 Mar 2019 00:33:01 GMT

Hi Everyone,

We have SVI vlan on layer 3 core switch A.

this switch has connection to ASA and also to another B Layer 3 switch.

B Layer 3 switch connects to Layer 2 switch which has this vlan.

Need to undertsand traffic flow from user PC to Switch A.

Switch B has default route which is static to fw for subnet of vlan.

Now traffic goes from layer 2 switch to core Switch B then it has static route for that vlan which is ASA as next hop.

now traffic comes to ASA from there it goes to core Switch B which has SVI Vlan in it.

Also Core Switch A and B has trunk connection which carries that vlan.

Need to know if return traffic from core Switch A comes via ASA or by Switch B?

How can i check this?

Thanks

MAhesh

Traffic flowing through Fw

Julio Carvajal — Wed, 05 Dec 2012 22:13:19 GMT

Hello Mahesh,

Not sure if I undertsood the topology but anyway the way to test this would be creating captures on the interface where you think the ASA should receive the traffic, if you do not see the packets there well that would lead us to the returning traffic going to Switch B.

Traffic flowing through Fw

mahesh18 — Wed, 05 Dec 2012 22:37:07 GMT

Many thanks Julio

Regards

MAhesh