Best qdisc for interfaces of a firewall?

Linux Advanced Routing and Traffic Control

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Hi,
I just looked at the interfaces of our EdgeRouter Pro appliance that we
plan to replace (due to it apparently being overloaded at 150Mbit) and
see that they all have a qdisc of "noqueue".

What is the best qdisc to select for a pure firewall system? I can't
find any decent information about the various qdiscs and which to chose
in specific situations. For example there seems to exist a multiq
scheduler but I cannot find a lot of information about its
characteristics plus I already assigned the irq of each queue of the nic
to individual cores so I wonder if something like multiq is even necessary.

I'm also wondering about fairness and if that might be a legitimate
reason to chose somehting like noqueue so one flooding flow cannot hog
the queue and penalize all other flows.

Any ideas what would be a well performing yet fair choice here?

Regards,
  Dennis
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