Bug 255294 - augment if_tuntap man page on source of autogenerated MAC (/etc/hostid)
Summary: augment if_tuntap man page on source of autogenerated MAC (/etc/hostid)
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: conf (show other bugs)
Version: CURRENT
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-doc (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-04-21 07:51 UTC by Kurt Jaeger
Modified: 2021-04-21 07:56 UTC (History)
1 user (show)

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Description Kurt Jaeger freebsd_committer 2021-04-21 07:51:00 UTC
ifconfig tap0 creates a tap0 device with a seemingly random MAC. The MAC comes from /etc/hostid -- if somehow the /etc/hostid was cloned during multiple instances, the MAC will be the same, which will cause trouble in VPNs.