https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211380
Bug ID: 211380
Summary: Add rule to avoid packets that natd divert doesn't
need to see
Product: Documentation
Version: Latest
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: Documentation
Assignee: freebsd-doc@FreeBSD.org
Reporter: ahi...@p-o.co.uk
Created attachment 172993
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=172993&action=edit
Patch to add firewall rule to example
natd can have higher utilisation when it sees unnecessary packets.
Adding a rule to send packets out that natd doesn't need to reduces CPU cycles.
For background see
https://lists.freebsd.org/pipermail/freebsd-ipfw/2013-February/005306.html
My testing and implementation reduced ~50% wcpu to < 1%
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