From nobody Thu Apr 03 20:42:25 2025 X-Original-To: stable@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 4ZTDGG4Nnnz5sSQn for ; Thu, 03 Apr 2025 20:43:18 +0000 (UTC) (envelope-from cross+freebsd@relay.distal.com) Received: from relay.wiredblade.com (relay.wiredblade.com [168.235.95.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4ZTDGG1hWTz3rdr for ; Thu, 03 Apr 2025 20:43:17 +0000 (UTC) (envelope-from cross+freebsd@relay.distal.com) Authentication-Results: mx1.freebsd.org; none dkim-signature: v=1; a=rsa-sha256; d=relay.distal.com; s=mail; c=relaxed/relaxed; q=dns/txt; h=From:Subject:Date:Message-ID:To:CC:MIME-Version:Content-Type:Content-Transfer-Encoding:In-Reply-To:References; bh=RaxjD5XDsGCesrzX8jkh7+rWZ9MxjSteR1Q4JkRUzHY=; b=VYzN9iC+gWpCsIgxx3ACrY0rR8gY/WmENpHLzRAbjjZQobYgggGTavvuc2SWJ8wmwXXa9JhrnxsNw8H7fBbQN9wUVJIgBEI0Sck/aJ45kTLqGdus8F9kre38RsAVZcptWST1/N1eb/cV9FK6GdUu+NunWmbIIn64lnml3FRDGaBkY6S9DK6fBpb2osLIVZ0PZdZ9F3EIty9lr/9RP4mbmp2oT+u9PveoONCyN+hgTueHAuosDA/YnqvN5V 6zLKWGJ9tSxz+GZ+Gf2YNOvHQQjKGii1eENQtvad95FvGfGTczsezCubdGdvM47q2UCwYc7IZiJ87BylO0RtKP9j6OWg== Received: from mail.distal.com (pool-108-51-233-124.washdc.fios.verizon.net [108.51.233.124]) by relay.wiredblade.com with ESMTPSA (version=TLSv1.2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256) ; Thu, 3 Apr 2025 20:42:59 +0000 Received: from smtpclient.apple ( [2600:4040:2c9d:5220:1c2a:c621:6126:c1a1]) by tristain.distal.com (OpenSMTPD) with ESMTPSA id b22c482b (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256:NO); Thu, 3 Apr 2025 16:42:57 -0400 (EDT) Content-Type: text/plain; charset=utf-8 List-Id: Production branch of FreeBSD source code List-Archive: https://lists.freebsd.org/archives/freebsd-stable List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-stable@freebsd.org Sender: owner-freebsd-stable@FreeBSD.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3826.400.131.1.6\)) Subject: Re: IPv6 over an ipv4 tunnel From: Chris Ross In-Reply-To: <60931787-7224-4cf1-84a0-5800ce46fdd2@jarasoft.net> Date: Thu, 3 Apr 2025 16:42:25 -0400 Cc: stable@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: <86D7F3AB-05D4-43A5-9AE0-121EC24EC762@distal.com> References: <60931787-7224-4cf1-84a0-5800ce46fdd2@jarasoft.net> To: mlist@jarasoft.net X-Mailer: Apple Mail (2.3826.400.131.1.6) X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; TAGGED_FROM(0.00)[freebsd]; ASN(0.00)[asn:3842, ipnet:168.235.92.0/22, country:US] X-Rspamd-Queue-Id: 4ZTDGG1hWTz3rdr X-Spamd-Bar: ---- > On Apr 3, 2025, at 16:35, Jack Raats wrote: >=20 > Hi, >=20 > I have two servers, both running FreeBSD 14.2 >=20 > Server A has only one ipv4 address, no ipv6. >=20 > Server B has one ipv4 address and an ipv6 subnet. >=20 > Is it possible to give Server A an ipv6 address from server B ipv6 = subnet and ipv6 connectivity and how? You can set up an IPv4 point-to-point tunnel between them, and then have = server B delegate a small section of its IPv6 subnet (or a single = address I suppose) to the far side of that tunnel. It might only = require setting IPv6 addresses on the point-to-point tunnel itself, but = I=E2=80=99m not certain. It should be easy to search for =E2=80=9Cipv6 in ipv4 tunnel freebsd=E2=80= =9D to find instructions. I know I=E2=80=99ve done things like this, = but don=E2=80=99t have an example to look at right now. I had set up a = =E2=80=9Cgif0=E2=80=9D tunnel interface to an outside provider, back in = the FreeBSD 10/11 days (or before). I would expect the same on your = Server A, but I=E2=80=99m not sure if the setup on Server B will be that = simple or more complicated. - Chris