Anybody experimented with extreme use of IPv6 privacy mechanisms? E.g. rapidly changing IPv6 addresses used by a host? I found some research; see https://scholar.google.com/scholar?cites=11662464294055671175 …. I’m curious if anybody actually tried it.
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Replying to @BRIAN_____
I tried it, and I found out that Linux kept the old addresses around as long as any connection associated with it was still active, which makes sense. Except I have long-poll sockets, so I ended up with 100s of addresses still present and a lot of neighbor discovery traffic.
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Replying to @colmmacc
I didn’t think about the neighbor discovery traffic. I did realize that it only works as intended when connections are short. Was this just a matter of changing setting a in Linux or you had to programmatically do it? It is encouraging that Linux seems to do it sensibly.
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There's a sysctl for it. I set it in /etc/sysctl.d/10-ipv6-privacy.conf , net.ipv6.conf.[whatever].use_tempaddr , but this is all Ubuntu.
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