no port randomization with dig over IPv6 on mac os

[Jakob Dhondt]

Dear list,

I have just noticed that when using dig (different versions) on Mac OS
(High Sierra) over IPv6 the source port is not randomized. Instead, the
port is incremented by 2 every time I execute the dig command. Is this a
known issue? I have tried to reproduce this behavior on Linux where,
with both IPv4 and IPv6, port randomization seems to be working.

Kind regards,

Jakob

-- 

SWITCH
Jakob Dhondt, Security Engineer, SWITCH-CERT
Werdstrasse 2, P.O. Box, 8021 Zurich, Switzerland
phone +41 44 268 15 15, direct +41 44 268 16 23
jakob.dhondt at switch.ch, www.switch.ch
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