From mboxrd@z Thu Jan 1 00:00:00 1970
Return-Path: <s.ivanov@proxmox.com>
Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68])
(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
key-exchange X25519 server-signature RSA-PSS (2048 bits))
(No client certificate requested)
by lists.proxmox.com (Postfix) with ESMTPS id 77109796A6
for <pve-devel@lists.proxmox.com>; Tue, 4 May 2021 19:00:51 +0200 (CEST)
Received: from firstgate.proxmox.com (localhost [127.0.0.1])
by firstgate.proxmox.com (Proxmox) with ESMTP id 6958AC226
for <pve-devel@lists.proxmox.com>; Tue, 4 May 2021 19:00:51 +0200 (CEST)
Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com
[94.136.29.106])
(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
key-exchange X25519 server-signature RSA-PSS (2048 bits))
(No client certificate requested)
by firstgate.proxmox.com (Proxmox) with ESMTPS id ED2C1C1C9
for <pve-devel@lists.proxmox.com>; Tue, 4 May 2021 19:00:48 +0200 (CEST)
Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1])
by proxmox-new.maurer-it.com (Proxmox) with ESMTP id C705042A44
for <pve-devel@lists.proxmox.com>; Tue, 4 May 2021 19:00:48 +0200 (CEST)
From: Stoiko Ivanov <s.ivanov@proxmox.com>
To: pve-devel@lists.proxmox.com
Date: Tue, 4 May 2021 19:00:32 +0200
Message-Id: <20210504170032.8721-9-s.ivanov@proxmox.com>
X-Mailer: git-send-email 2.20.1
In-Reply-To: <20210504170032.8721-1-s.ivanov@proxmox.com>
References: <20210504170032.8721-1-s.ivanov@proxmox.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
X-SPAM-LEVEL: Spam detection results: 0
AWL 0.009 Adjusted score from AWL reputation of From: address
KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment
SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record
SPF_PASS -0.001 SPF: sender matches SPF record
Subject: [pve-devel] [PATCH docs v2 3/3] network: shortly document disabling
ipv6 support
X-BeenThere: pve-devel@lists.proxmox.com
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Proxmox VE development discussion <pve-devel.lists.proxmox.com>
List-Unsubscribe: <https://lists.proxmox.com/cgi-bin/mailman/options/pve-devel>,
<mailto:pve-devel-request@lists.proxmox.com?subject=unsubscribe>
List-Archive: <http://lists.proxmox.com/pipermail/pve-devel/>
List-Post: <mailto:pve-devel@lists.proxmox.com>
List-Help: <mailto:pve-devel-request@lists.proxmox.com?subject=help>
List-Subscribe: <https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel>,
<mailto:pve-devel-request@lists.proxmox.com?subject=subscribe>
X-List-Received-Date: Tue, 04 May 2021 17:00:51 -0000
Given that quite a few HOWTOs on the internet suggest disabling ipv6
support via kernel commandline, which can cause quite many undesired
side-effects (e.g. ip6tables as used in pve-firewall errors out)
this patch adds a short section documenting, that disabling ipv6 is
not necessary usually and if needed better done via sysctl.
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
---
pve-network.adoc | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/pve-network.adoc b/pve-network.adoc
index add220e..37667b8 100644
--- a/pve-network.adoc
+++ b/pve-network.adoc
@@ -548,6 +548,25 @@ iface vmbr0 inet manual
----
+Disabling IPv6 on the Node
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+{pve} works correctly in all environments, irrespective of whether IPv6 is
+deployed or not. We recommend leaving all settings at the provided defaults.
+
+Should you still need to disable support for IPv6 on your node, do so by
+creating an appropriate `sysctl.conf (5)` snippet file and setting the proper
+https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt[sysctls],
+for example adding `/etc/sysctl.d/disable-ipv6.conf` with content:
+
+----
+net.ipv6.conf.all.disable_ipv6 = 1
+net.ipv6.conf.default.disable_ipv6 = 1
+----
+
+This method is preferred to disabling the loading of the IPv6 module on the
+https://www.kernel.org/doc/Documentation/networking/ipv6.rst[kernel commandline].
+
////
TODO: explain IPv6 support?
TODO: explain OVS
--
2.20.1