From nobody Tue Jan 27 18:17:27 2026 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4f0tt72WCFz6QDN8 for ; Tue, 27 Jan 2026 18:17:35 +0000 (UTC) (envelope-from shawn.webb@hardenedbsd.org) Received: from mail-oo1-xc2a.google.com (mail-oo1-xc2a.google.com [IPv6:2607:f8b0:4864:20::c2a]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "WR4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4f0tt70FYSz3fqZ for ; Tue, 27 Jan 2026 18:17:35 +0000 (UTC) (envelope-from shawn.webb@hardenedbsd.org) Authentication-Results: mx1.freebsd.org; none Received: by mail-oo1-xc2a.google.com with SMTP id 006d021491bc7-662f5c4665eso222267eaf.2 for ; Tue, 27 Jan 2026 10:17:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hardenedbsd.org; s=google; t=1769537849; x=1770142649; darn=freebsd.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=CWtXW3wE4IcJX1ftNeD8RX17ZSkI3TAKbILt3btxSB0=; b=QHaILVjqcxRpp5GQmvszS7q0Wl/KNxEEXu1969ZmlDjNUitksfvNJH7psOPnyoN+Ui hxGZL2p32+oIsB8UDP5u14ehzPN1NkyQLnUJcM1wt3JOBc09QVrLuT7J7NMBRPLpsLqd nDbKyN0ugJAIh0KgigEqXUFSVOO7qFvhju8h07BZApKOUDe7CvHriCPOunUdibHAYYEa 73NfSE2Y/2+i8PDuiPkgiL/nJ3bnlMU397dZ3pNuUOU9kru5dQxrAXDACUXDCq31xQT6 MLhUy6N2AmoKwiiMS9qvsU4kM/3Bt50/LnKNaVRR+MUO5x2GWu/lbRBpAEbQl1Tg5QBT 88lQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769537849; x=1770142649; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=CWtXW3wE4IcJX1ftNeD8RX17ZSkI3TAKbILt3btxSB0=; b=exq5pozpgkgqTVo9/4uXQqda2ZGgSPFi8518LhPVwUv//NwUFGrDnpHunP+e43uCXM s3qyvfgb4KSGpN4d5i/ycZEiGMBrCSEVmIj2+PJ8jK/jPLceoPYrwuUUwPcYIHzzK000 V1MAZOx6I88OxTjZxXQ2+gLaSMfn8g1DO3CSFKaKtUZLEV442hjY3M9wKoMg9qizUN7W HPfDsNCdTNSYO5rVf3aU60Zo95wJ8QAeT+jRZ0jEFvQgmAnZD15rg/2oFpONgJIGjlpA 16qwAJQsqmq6JiJVW7PPxACWIIlLcTUjb6yDT89XSS1Uix92tnSWSoNj0IyDD7y/sdOo PB7Q== X-Gm-Message-State: AOJu0YzQtMMXQPKc9zbbVJCuKS31urCJAs1a63/k2n4TJCF6k0i6Zfbh 1XwbwaYvADxyI+TUyvhKmZwx/EB5Yl3nQuDnDS94a4G13mRGf87u2hUiwQbvv07hcnSssZA0Fq9 aAzGDGV8= X-Gm-Gg: AZuq6aJc5XHDkyHrFdaGtGWu8Tm9pIRPTLa5hq2xZZ0Qpi7M9v5TSFHSFOrCShO2YXo e/KgETLYuSfblX8Q5E5T8lJ1m/kk3IqAR4Y/CTUS8Iv6/hVPl7HIONzZh8ZchM91o76RIn6XwGR QXoEQlpS3ngxU7Sl+i7+x4C3aVSQlvPw3ApNrJ5ls3/YmgEFPJjf2XAmmRD8Nug3e1apo3TyFI9 hcYi/CzcD1cSDtxj1vJcbwagH+qntudOiBXeB+Sx2ScLMMhWkbflfMY7WeljytqKcq7YT0tfxkm idKnU0j5vXyu7/urp+H9E1bVEtiKPVqCX8iVN8EpoSFORdK06tRwajebNHSzspGfeElTZ6pOs+j cOB2Z7iDBm+Mkky7deJP9+xo2gvc+3+mFQisUEk/QXktc7v2t8v9zmhid0Sw090QUppbY X-Received: by 2002:a05:6820:80c7:b0:662:bc9a:91c6 with SMTP id 006d021491bc7-662f20435acmr1538539eaf.22.1769537848554; Tue, 27 Jan 2026 10:17:28 -0800 (PST) Received: from mutt-hbsd ([2001:470:4001:1::95]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-4095749f298sm266817fac.12.2026.01.27.10.17.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jan 2026 10:17:28 -0800 (PST) Date: Tue, 27 Jan 2026 18:17:27 +0000 From: Shawn Webb To: Pouria Mousavizadeh Tehrani Cc: freebsd-current@freebsd.org, madpilot@freebsd.org Subject: Re: we should enable RFC7217 by default Message-ID: X-Operating-System: FreeBSD mutt-hbsd 14.3-STABLE-HBSD FreeBSD 14.3-STABLE-HBSD HARDENEDBSD-14-STABLE amd64 X-PGP-Key: https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/blob/master/Shawn_Webb/03A4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc References: <9cda2fbc-b8fb-44d1-8c1f-88395d741af7@FreeBSD.org> List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="7ci6kqcufi7stpup" Content-Disposition: inline In-Reply-To: <9cda2fbc-b8fb-44d1-8c1f-88395d741af7@FreeBSD.org> X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US] X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Rspamd-Queue-Id: 4f0tt70FYSz3fqZ --7ci6kqcufi7stpup Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: we should enable RFC7217 by default MIME-Version: 1.0 On Tue, Jan 27, 2026 at 03:35:16AM +0330, Pouria Mousavizadeh Tehrani wrote: > Hi everyone, >=20 > With `net.inet6.ip6.use_stableaddr` now available, I believe we should > enable it by default in CURRENT at least. > As you may already know, we currently use the EUI64 method for generating > stable IPv6 addresses, which has serious privacy issues. >=20 > IMHO, trying to maintain backward compatibility defeats the purpose of a > privacy RFC. >=20 > To be clear, we don't want to change the ip addresses of existing servers. > However, it's reasonable for users to expect changes during a major upgra= de > (15 -> 16), a fresh install of a new major release, or living on CURRENT. > So, for obvious reasons, changing the default value would not be MFCed. >=20 > What do you think? I think this would be a good step for FreeBSD. In HardenedBSD, we set net.inet6.ip6.{prefer,use}_tempaddr to 1, which creates completely random IPv6 addresses (scoped to the prefix, of course). The one thing I would hope is that support for completely random IPv6 addresses via SLAAC does not go the way of the dodo. (If net.inet6.ip6.use_stableaddr becomes the default, we will likely keep it at 0 in favor of the other aforementioned sysctl nodes.) Thanks, --=20 Shawn Webb Cofounder / Security Engineer HardenedBSD Signal Username: shawn_webb.74 Tor-ified Signal: +1 303-901-1600 / shawn_webb_opsec.50 https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/raw/master/Shawn_Webb/03A= 4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc --7ci6kqcufi7stpup Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEA6TL67gupaZ9nzhT/y5nonf44foFAml5ASYACgkQ/y5nonf4 4foUFxAAjQwjT0ntjCjb+8u2lqpzr7E7XzNZEAf9Y+NWZD8ZXKHohpazkfKzhBuU pEPMvh24nJywlwN6BxF/csJPa+3yJISNsiySxP9O7jmGkIasO7Y9PC2m7v+i3+GI zbF41+k867WSH5GV06+2TeA4QJ7bIHEHHPlBvP98I/aCaMUTXHV3CVFCIuNsDovy 9caZPPIxGf93J0X7PnlxMJmTz//HTIiQeZbUPH7zHAKMmYkqqMbYenM8ifO/ZmBH EiPaBIMe9rVYcEzZ+pIawaC7YAIMJWgVVfNr3AFtDWEaktUgVEX8VNoI6HDmgz0G cUAkpH9M6uCH446P605dyoalqI4eagnwfjR7aDmTp5z9Afsl/+nVhvn8rdsXarcB ydBCBxfLuq81YiXlpWKouWwG8NZh96Ov+GfcRAzne9lm+LXzGbU1cRZFUuUciu+C 1nV0DxLmRM53XncydsiHTOXj0C2y/BFjjh8OoTDavSq5AoBFY/k6hJ4Bwf4Z2wHl 6gO1BGBb5JZPwYHsTh/CiVFFuuNTVUMyi6OXx40X5ehex7CAgci7M/y9UKkddsCQ +Ur68V2xRqilNJ6fT2odGZoVpJkK5jGWBDoFiCgJQGxry0i2vyUpLc5PiXXHAUCM ez3IQNZ/FDGBftzMouC9FiGTdJ81Kl2o7S8LCPSXkdxSAF/iue8= =JSIK -----END PGP SIGNATURE----- --7ci6kqcufi7stpup--