From owner-freebsd-net@freebsd.org Wed Jun 19 16:18:15 2019 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B7D1415BDAEC; Wed, 19 Jun 2019 16:18:15 +0000 (UTC) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (br1.CN84in.dnsmgr.net [69.59.192.140]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id E96206CFE6; Wed, 19 Jun 2019 16:18:14 +0000 (UTC) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (localhost [127.0.0.1]) by gndrsh.dnsmgr.net (8.13.3/8.13.3) with ESMTP id x5JGIDPV018901; Wed, 19 Jun 2019 09:18:13 -0700 (PDT) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: (from freebsd-rwg@localhost) by gndrsh.dnsmgr.net (8.13.3/8.13.3/Submit) id x5JGIDWa018900; Wed, 19 Jun 2019 09:18:13 -0700 (PDT) (envelope-from freebsd-rwg) From: "Rodney W. Grimes" Message-Id: <201906191618.x5JGIDWa018900@gndrsh.dnsmgr.net> Subject: Re: Eliminating IPv6 (?) In-Reply-To: <2cd79858-66a6-dedb-19b8-697d220c9986@grosbein.net> To: Eugene Grosbein Date: Wed, 19 Jun 2019 09:18:13 -0700 (PDT) CC: "Ronald F. Guilmette" , freebsd-net , FreeBSD Questions Mailing List X-Mailer: ELM [version 2.4ME+ PL121h (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: E96206CFE6 X-Spamd-Bar: ++ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [2.81 / 15.00]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; NEURAL_SPAM_SHORT(0.39)[0.388,0]; IP_SCORE(0.04)[ip: (0.14), ipnet: 69.59.192.0/19(0.07), asn: 13868(0.05), country: US(-0.06)]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[dnsmgr.net]; AUTH_NA(1.00)[]; NEURAL_SPAM_MEDIUM(0.53)[0.533,0]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; MX_GOOD(-0.01)[cached: gndrsh.dnsmgr.net]; NEURAL_SPAM_LONG(0.96)[0.960,0]; R_SPF_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:13868, ipnet:69.59.192.0/19, country:US]; MID_RHS_MATCH_FROM(0.00)[]; SUBJECT_HAS_QUESTION(0.00)[] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Jun 2019 16:18:15 -0000 > 19.06.2019 3:57, Ronald F. Guilmette wrote: > > > And god only knows how much will break once I've done that. > > IPv6 will break only. That is incorrect, scripts that would silently do nothing can now infact fail, trust me, first hand experience. This can have consequences beyong "IPv6 will break only". > > How many other > > people have tested -all- of the resulting binaries, seriously, on actual > > production systems? (I may be the first one ever, at least for 12.0.) > > I ran plenty of hosts with IPv6 disabled this way and no problems observed, but this pre-dates 12.0. I've not run a userland without V6 in a long time once I started to have issues with some things. -- Rod Grimes rgrimes@freebsd.org