Bug 255294

Summary: augment if_tuntap man page on source of autogenerated MAC (/etc/hostid)
Product: Base System Reporter: Kurt Jaeger <pi>
Component: confAssignee: freebsd-doc (Nobody) <doc>
Status: New ---    
Severity: Affects Only Me CC: pi
Priority: ---    
Version: CURRENT   
Hardware: Any   
OS: Any   

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.