From nobody Fri Jul 14 21:48:50 2023 X-Original-To: freebsd-questions@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 4R2lVQ6Qlxz4n9HQ for ; Fri, 14 Jul 2023 21:49:02 +0000 (UTC) (envelope-from bc979@lafn.org) Received: from mail.sermon-archive.info (sermon-archive.info [47.181.130.121]) by mx1.freebsd.org (Postfix) with ESMTP id 4R2lVQ0ZRZz3mXt for ; Fri, 14 Jul 2023 21:49:01 +0000 (UTC) (envelope-from bc979@lafn.org) Authentication-Results: mx1.freebsd.org; dkim=none; spf=pass (mx1.freebsd.org: domain of bc979@lafn.org designates 47.181.130.121 as permitted sender) smtp.mailfrom=bc979@lafn.org; dmarc=none Received: from smtpclient.apple (mini [10.0.1.251]) by mail.sermon-archive.info (Postfix) with ESMTPSA id 4R2lVP0G7Yz2gFFm; Fri, 14 Jul 2023 14:49:01 -0700 (PDT) Content-Type: text/plain; charset=us-ascii List-Id: User questions List-Archive: https://lists.freebsd.org/archives/freebsd-questions List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.600.7\)) Subject: Re: OT: how to make a ssh/showmount usable with no internet From: Doug Hardie In-Reply-To: Date: Fri, 14 Jul 2023 14:48:50 -0700 Cc: FreeBSD Mailing List Content-Transfer-Encoding: quoted-printable Message-Id: References: To: Aryeh Friedman X-Mailer: Apple Mail (2.3731.600.7) X-Virus-Scanned: clamav-milter 1.0.1 at mail X-Virus-Status: Clean X-Spamd-Result: default: False [-2.68 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.99)[-0.991]; NEURAL_HAM_LONG(-0.99)[-0.989]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+mx]; RCVD_NO_TLS_LAST(0.10)[]; MIME_GOOD(-0.10)[text/plain]; MLMMJ_DEST(0.00)[freebsd-questions@freebsd.org]; FREEMAIL_TO(0.00)[gmail.com]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; R_DKIM_NA(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; ARC_NA(0.00)[]; TO_DN_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; DMARC_NA(0.00)[lafn.org: no valid DMARC record]; TAGGED_RCPT(0.00)[]; ASN(0.00)[asn:5650, ipnet:47.181.128.0/18, country:US] X-Rspamd-Queue-Id: 4R2lVQ0ZRZz3mXt X-Spamd-Bar: -- X-ThisMailContainsUnwantedMimeParts: N > On Jul 14, 2023, at 07:28, Aryeh Friedman = wrote: >=20 > Due to some t-storms my internet is up and down like nuts today but > the upshot is it seems that even local ssh requires a reverse DNS > lookup and thus has a very long hang before connecting. How can I > prevent this behaviour >=20 > Additional question: what additional steps do I need to make the > system completely separable from the internet (I already ran into > reverse DNS issues with showmount). (I use NFS but not NIS for most > stuff) I run unbound (full version) on one of my servers. All my systems are = entered into it's database as local-data in local-zone. All the systems = use that system for DNS. If the internet is down, local DNS still = works. I don't the RDNS entries and haven't needed them. If they are = necessary, unbound can do that also. -- Doug