Bug 6981 - the client gets fooled by virtual network cards with fake MAC addresses
Summary: the client gets fooled by virtual network cards with fake MAC addresses
Status: NEW
Alias: None
Product: ThinLinc
Classification: Unclassified
Component: Client (show other bugs)
Version: 1.3.1
Hardware: PC Unknown
: P2 Normal
Target Milestone: LowPrio
Assignee: Pierre Ossman
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-05-24 14:07 CEST by Pierre Ossman
Modified: 2019-11-26 12:50 CET (History)
1 user (show)

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Description Pierre Ossman cendio 2017-05-24 14:07:09 CEST 
Since we allocate licenses based on MAC address of the client, it is important that these are stable and per-machine. However it is now common to have virtual network cards for various virtualisation software. These will either have a random address, or the same one on every installation. Neither is good for us.

Fortunately such fake addresses can easily be filtered out as the second bit of the highest byte indicates if it's a unique, globally allocated address or not.

E.g.

 Fake: 52:54:00:79:d6:88
 Real: 90:b1:1c:97:f9:32
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