[GH-ISSUE #199] check if ipv6 is made by a stack with privacy extensions #182

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opened 2026-02-26 09:36:22 +03:00 by kerem · 2 comments

kerem commented

2026-02-26 09:36:22 +03:00

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Originally created by @ThomasWaldmann on GitHub (Feb 9, 2015).
Original GitHub issue: https://github.com/nsupdate-info/nsupdate.info/issues/199

we show ipv4 and v6 addresses on the main page of the service.

we could add a small hint ("PE") if we detect that the v6 addr isn't derived from interface mac.

note: we can't know whether the whole address is static as the prefix might also change.

Originally created by @ThomasWaldmann on GitHub (Feb 9, 2015). Original GitHub issue: https://github.com/nsupdate-info/nsupdate.info/issues/199 we show ipv4 and v6 addresses on the main page of the service. we could add a small hint ("PE") if we detect that the v6 addr isn't derived from interface mac. note: we can't know whether the whole address is static as the prefix might also change.

kerem

2026-02-26 09:36:22 +03:00

closed this issue
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kerem commented

2026-02-26 09:36:22 +03:00

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@elnappo commented on GitHub (Dec 27, 2016):

There are more and more ways to generate stable interface (host part) addresses which are not using the MAC of the interface such as RFC7217. As far as I see, it is not possible to detect if a address was generated via RFC7217. So the proposal would leat to many false-positives.

@elnappo commented on GitHub (Dec 27, 2016): There are more and more ways to generate stable interface (host part) addresses which are not using the MAC of the interface such as [RFC7217](https://tools.ietf.org/html/rfc7217). As far as I see, it is not possible to detect if a address was generated via RFC7217. So the proposal would leat to many false-positives.

kerem commented

2026-02-26 09:36:22 +03:00

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@ThomasWaldmann commented on GitHub (May 25, 2017):

closing, not reliably possible.

also: chosing and sending the right ipv6 addr is problem of the dyndns client.

@ThomasWaldmann commented on GitHub (May 25, 2017): closing, not reliably possible. also: chosing and sending the right ipv6 addr is problem of the dyndns client.

kerem referenced this issue

2026-02-26 09:36:31 +03:00

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