From owner-freebsd-net@freebsd.org Wed Mar 18 15:35:47 2020 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 9E158263764; Wed, 18 Mar 2020 15:35:47 +0000 (UTC) (envelope-from vas@sibptus.ru) Received: from admin.sibptus.ru (admin.sibptus.ru [IPv6:2001:19f0:5001:21dc::10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 48jDdZ38xQz3PVM; Wed, 18 Mar 2020 15:35:46 +0000 (UTC) (envelope-from vas@sibptus.ru) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sibptus.ru; s=20181118; h=In-Reply-To:Message-ID:Subject:To:From:Date; bh=D/4BCSUmmgSytvpw4imz6/5mp1g3nXUZsM0vJi0gB+w=; b=aYsubMipX9rBRtODWU9KowKBMv p+NkIUrKbAfIyp/0Kky1b2Bs3kKG6Ka/kG8SOREVKUZm+YkdNevwD8XDMi5Lnw5GXwYj5QkcaXsQq WXBG05msC7Ls0vTncOR2FxqRA6I4gMhYTxWk6DuiTJW8LK0i2t012x0kCIse+BLQs4Vc=; Received: from vas by admin.sibptus.ru with local (Exim 4.93.0.4 (FreeBSD)) (envelope-from ) id 1jEajQ-000H82-Um; Wed, 18 Mar 2020 22:35:44 +0700 Date: Wed, 18 Mar 2020 22:35:44 +0700 From: Victor Sudakov To: "Bjoern A. Zeeb" Cc: freebsd-questions@freebsd.org, freebsd-net@freebsd.org Subject: Re: IPv6 in jails Message-ID: <20200318153544.GA65497@admin.sibptus.ru> References: <20200318151556.GA64871@admin.sibptus.ru> <069AA173-29F1-4F9F-B7D6-31BF2C559C17@lists.zabbadoz.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="UlVJffcvxoiEqYs2" Content-Disposition: inline In-Reply-To: <069AA173-29F1-4F9F-B7D6-31BF2C559C17@lists.zabbadoz.net> X-PGP-Key: http://admin.sibptus.ru/~vas/ X-PGP-Fingerprint: 10E3 1171 1273 E007 C2E9 3532 0DA4 F259 9B5E C634 X-Rspamd-Queue-Id: 48jDdZ38xQz3PVM X-Spamd-Bar: -------- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=sibptus.ru header.s=20181118 header.b=aYsubMip; dmarc=pass (policy=none) header.from=sibptus.ru; spf=pass (mx1.freebsd.org: domain of vas@sibptus.ru designates 2001:19f0:5001:21dc::10 as permitted sender) smtp.mailfrom=vas@sibptus.ru X-Spamd-Result: default: False [-8.43 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.98)[-0.976,0]; R_DKIM_ALLOW(-0.20)[sibptus.ru:s=20181118]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; R_SPF_ALLOW(-0.20)[+mx:c]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.20)[multipart/signed,text/plain]; IP_SCORE(-3.36)[ip: (-9.89), ipnet: 2001:19f0:5000::/38(-4.94), asn: 20473(-1.91), country: US(-0.05)]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[sibptus.ru:+]; DMARC_POLICY_ALLOW(-0.50)[sibptus.ru,none]; SIGNED_PGP(-2.00)[]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:20473, ipnet:2001:19f0:5000::/38, country:US]; RCVD_COUNT_TWO(0.00)[2] 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, 18 Mar 2020 15:35:47 -0000 --UlVJffcvxoiEqYs2 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Bjoern A. Zeeb wrote: > >=20 > > Is IPv6 in jails supposed to work? Does not work for me, what am I doing > > wrong? > >=20 > > Here is a test jail: > >=20 > > test4 { > > path =3D /d02/jails/test4 ; > > mount.devfs; > > ip4 =3D new; > > ip6 =3D new; > > ip4.addr =3D 192.168.4.204/24; > > ip6.addr =3D 2001:470:ecba:3::4/64; >=20 > I usually do something like this: >=20 > ip6.addr +=3D "lo0|2001:db8:1234:5678::ef/128"; >=20 > to add the single address out of a /64 to the loopback interface on the h= ost > and then pass it through to the jail. The /64 however is actually routed= to > my host so might not work if you have the /64 on the physical interface. But the same syntax for IPv4 (192.168.4.204/24) works fine! The address 192.168.4.204 is successfully assigned to the jail. >=20 > Given it is a jail without vnet you cannot assign a /64 to the jail, you > want to just specify the address usually (plainly or as /128). Why is that? I can assign an IPv4 /24 to the jail but cannot assign an IPv6= /64 ? The prefix length should be irrelevant, as it is irrelevant in the IPv4 case. >=20 > > host.hostname =3D test4.vas.sibptus.ru ; > > interface =3D re1 ; > > allow.raw_sockets =3D true ; > > exec.start =3D "/bin/sh /etc/rc"; > > exec.stop =3D "/bin/sh /etc/rc.shutdown"; > > } > >=20 > > However when I look from inside the jail, I see the daemons listening > > only on IPv4: > >=20 > > root@test4:/ # sockstat -l > > USER COMMAND PID FD PROTO LOCAL ADDRESS FOREIGN > > ADDRESS > > root sendmail 17178 3 tcp4 192.168.4.204:25 *:* > > root sshd 17175 3 tcp4 192.168.4.204:22 *:* > > root syslogd 17110 5 udp4 192.168.4.204:514 *:* > >=20 > > If I "ssh 2001:470:ecba:3::4" from outside, I get into the host instead > > of the jail (because 2001:470:ecba:3::4 *is* assigned to re1, but not > > available inside the jail). >=20 > One thing to check first is ifconfig inside the jail does see the address? Yes, it does: root@test4:/ # ifconfig re1 re1: flags=3D8843 metric 0 mtu 1500 description: Inside options=3D8209b ether c4:12:f5:33:c9:7c inet 192.168.4.204/24 broadcast 192.168.4.255 inet6 2001:470:ecba:3::4/64 media: Ethernet autoselect (none) status: no carrier nd6 options=3D21 root@test4:/ #=20 --=20 Victor Sudakov, VAS4-RIPE, VAS47-RIPN 2:5005/49@fidonet http://vas.tomsk.ru/ --UlVJffcvxoiEqYs2 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEcBAEBAgAGBQJecj/QAAoJEA2k8lmbXsY0m8YH/ij3ft/MAARs0Mnl+MPCWAFu 9yPOQXoLTsyHVx9Pvfp7YXHFEUwjoHx8e3+9jLkKMCy3O1aLi95Ztn344YWISdl/ DTpQFiromtWflvkeIf8obzhHrVEzOMBEWnYX340rQ/UFDc+Z2ya++7MuIU9Czac7 0qRe+b6owGWR6Jfn/GgRXYPuEoKMvxT6cnQJSbdsTKRw6a1tfeVMNvKzIcz0AhBp DeJoX7f5CNKNoPlwEMsM2ZsrgAryAv9aT+tuLnZtsgt62FBtUxyb1Dp/4gEozW/Z f1ngQ7RI/sFVgG9IFrqKVZixWmSJHPeDeUBivRw1EfLooLblJ9drg2TSRBO8dAc= =O2Nl -----END PGP SIGNATURE----- --UlVJffcvxoiEqYs2--