QOS Policy config with Destination NAT Traffic

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QOS Policy config with Destination NAT Traffic

L2 Linker
Hi, all

How can i set to config QoS Policy for Destination NAT Traffic from untrust to untrust zone.

I searched for related knowledge but could not find it.

which one is right?
untrust to untrust (Public IP)
untrust to trust (Public IP)
untrust to trust (Private IP)


Cyber Elite
Cyber Elite

Hi @hbshin


Hmn ... I would try the same as with the security policy: post-NAT destination zone and pre-NAT destination IP.

... and if this does nlt work, simply create different rules for testing with differdnt QoS classes assinged and check which QoS class will the connections have assigned.

Cyber Elite
Cyber Elite

QoS is applied on the egress interface (post-nat), whereas NAT is determined based on the pre-NAT IP  route lookup


is your NAT going to be a traditional untrust to untrust, translated to an internal IP, or are you intending to receive connections on the untrust, apply NAT (to another external IP) and then send packets back out of the untrust ? (u-turn on the outside ? )



in the former, you'd set your NAT untrust to untrust, and your QoS + security policies untrust to dmz/trust

in the latter, you'd have all your policies set to untrust-untrust

Tom Piens
PANgurus - (co)managed services and consultancy
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