https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241704
Bug ID: 241704
Summary: if_tap not using random MAC upon creation
Product: Base System
Version: 12.0-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: vve...@vvelox.net
Updated all my machines to r354217 this week and began running into an issue
where once rebooted OpenVPN stopped working. Turns out that all the tap0
interfaces on the machines when they came back up had the MAC
58:9c:fc:10:ff:c4, which prevents prevents ARP from working.
To reproduce this...
ifconfig tap create
ifconfig tap0
ifconfig tap0 destroy
ifconfig tap create
ifconfig tap0
ifconfig tap0 destroy
ifconfig tap create
ifconfig tap0
ifconfig tap0 destroy
And each time on each machine it will be created with the same MAC.
The work around for this is to add a manually set random MAC in via 'ether
random' for the line for it in rc.conf.
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