[Bug 256393] Issue with recreation of ppp/tun interfaces

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 05 Jun 2021 22:38:18 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256393

--- Comment #25 from Eugene Grosbein <eugen@freebsd.org> ---
(In reply to Rodney W. Grimes from comment #24)

> I agree, that would be necessary.  Though as is you should already be filtering this on both interfaces

Almost never had a reason to filter traffic flowing through loopback with
exceptionally rare case.

> they are a micro-optimization

It heavily depends on local condition and there may be lots of local traffic.

Also, I do not understand how a router can deal without delivering traffic
locally for its local IPs in many cases like running squid proxy or web/smtp
server or even routinely running ping to check if distinct uplink is still
alive.

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