On Mon, Jun 17, 2024 at 10:54:29AM -0400, Ed Maste wrote: > It is currently possible to specify an IPv4 address without a > netmask/width to ifconfig or in rc.conf, e.g.: > > ifconfig_igb0="192.168.0.2" > > phk recently discovered[1] that ifconfig chose a poor netmask/width > when none was specified. This was not an intentional change in > defaults but rather a bug that has now been fixed by grembo@, in > commit 8a9f0fa42b1c and merged to stable/14 in 048ad7a9ef9f. The fix > will be in FreeBSD 14.2. I am unsure if there will be an EN update for > 14.0/14.1. The bug does not exist in FreeBSD 13.x. > > Specifying an IPv4 address without a mask/width has been deprecated > since the deprecation of classful addressing. As of FreeBSD 13.1 > ifconfig has emitted a warning when no mask/width is specified, and > the intent was to make it an error after a sufficient amount of time > passed. > > I've opened a Phabricator review[2] for ifconfig to change the warning > into an error. I included a link to the review in phk's thread, and > asked for input on timing for landing the change. As there seems to be > consensus to include this change in FreeBSD 15.0 I plan to commit it > soon and am sending this note to increase the visibility of the > upcoming change. > > This will be prominently noted in the 15.0 release notes, and should > be mentioned in release notes for upcoming 13.x and 14.x releases.
Hey Ed, I hope I don't sound pathetically verbose here, but I just wanted to make sure to remove any sense of ambiguity. Would the "netmask <value>" option still work? For example: # ifconfig em0 inet 192.168.0.1 netmask 255.255.255.0 I suspect the answer is "yes". Thanks, -- Shawn Webb Cofounder / Security Engineer HardenedBSD Tor-ified Signal: +1 303-901-1600 / shawn_webb_opsec.50 https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/raw/master/Shawn_Webb/03A4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc
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