PBR-NAT or Route

[#1]

Hi all, Does PBR do " NAT" or " Route" traffic on outgoing interface,or it looks at firewall policy for deciding which one to choose? Best, Kamyar

[UkWizard]

policy based routing has nothing to do with the firewall rules or NAT. Think of it as an override to the static route(s). used for bending traffic based on matching one of more of the following; Source IP/Subnet Dest IP/Subnet Traffic Type Service (Dest port) Really only useful for multiple wan link setups. -Nat is determined by the firewall rule the traffic hits.

[#3]

so natting or routing must be chosen per firewall policy before PBR? Regards, Kamyar

[UkWizard]

No, routing is the flow of packets and is based on the static and policy based routes (policy does not mean firewall policies, thats a different entity) defined on the firewall. The FIREWALL policies (I call them rules to make it easier) are the allow/deny/encrypt rules which determines which traffic is allowed to pass and whether to scan it or NAT it. With NAT, generally, the rule of thumb is, all outbound (INT -> WAN) rules have NAT enabled, everything else doesn' t (ie INT->DMZ, WAN->INT, WAN->DMZ) When a connection comes into an interface, first it is checked to see whether its allowed (via the rules), if it is, then it will them be scanned or natted as required and then routed to where it matches based on first checking the PBR, and then the static routes if no PBR exists.

[#5]

and my understanding: FG without firewall policy(rules) does not allow any traffic even though PBR is configured and running...false ot true? Regards, Kamyar

[UkWizard]

yes that is correct, but as i have said, firewall rules are not related to PBR as such. A PBR would only be used if allowed by a rule.

[#7]

Thank you UkWizard...i find out now what' s happening inside of FG. Best, Kamyar

[UkWizard]

have a read through the manuals as their are many docs which explain how it works in great depth. Including the " life of a packet" .

[#9]

I just read " Life of a Packet" yesterday, it was great...thanks again