From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 07E54705CC for ; Mon, 6 Sep 2021 05:57:56 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id EA479BAC3 for ; Mon, 6 Sep 2021 05:57:25 +0200 (CEST) Received: from kvmformation3.odiso.net (globalOdiso.M6Lille.odiso.net [89.248.211.242]) by firstgate.proxmox.com (Proxmox) with ESMTP id A8629BAA0 for ; Mon, 6 Sep 2021 05:57:23 +0200 (CEST) Received: by kvmformation3.odiso.net (Postfix, from userid 0) id C4EB8120002; Mon, 6 Sep 2021 05:57:21 +0200 (CEST) From: Alexandre Derumier To: pve-devel@lists.proxmox.com Date: Mon, 6 Sep 2021 05:57:20 +0200 Message-Id: <20210906035720.4123158-3-aderumier@odiso.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210906035720.4123158-1-aderumier@odiso.com> References: <20210906035720.4123158-1-aderumier@odiso.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL 0.879 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% HEADER_FROM_DIFFERENT_DOMAINS 0.249 From and EnvelopeFrom 2nd level mail domains are different KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment KAM_LAZY_DOMAIN_SECURITY 1 Sending domain does not have any anti-forgery methods KHOP_HELO_FCRDNS 0.399 Relay HELO differs from its IP's reverse DNS NO_DNS_FOR_FROM 0.001 Envelope sender has no MX or A DNS records SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_NONE 0.001 SPF: sender does not publish an SPF Record Subject: [pve-devel] [PATCH pve-docs 2/2] sdn: add vxlan encryption notes X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Sep 2021 03:57:56 -0000 Signed-off-by: Alexandre Derumier --- pvesdn.adoc | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/pvesdn.adoc b/pvesdn.adoc index d26c6b9..eae47ad 100644 --- a/pvesdn.adoc +++ b/pvesdn.adoc @@ -898,3 +898,55 @@ public network can reply back. If you have configured an external BGP router, the BGP-EVPN routes (10.0.1.0/24 and 10.0.2.0/24 in this example), will be announced dynamically. + + +Notes +----- + +Vxlan Encryption +~~~~~~~~~~~~~~~~ +If you need to add encryption on top of vxlan, it's possible to do it with strongswan software. +You'll need to reduce the mtu around 60bytes (ipv4) or 80bytes (ipv6) to handle encryption. + +So with default 1500 mtu, you need mtu 1370 (1370 + 80bytes ipsec + 50 bytes vxlan). + + +Install strongwan +---- +apt install strongwan +---- + +Add configuration in /etc/ipsec.conf. +(Encrypt only vxlan udp port 4789) + +---- +conn %default + ike=aes256-sha1-modp1024! #the fastest (but reasonably secure)cipher on reasonably modern hardware + esp=aes256-sha1! + leftfirewall=yes # this is necessary when using Proxmox firewall rules + +conn output + rightsubnet=%dynamic[udp/4789] + right=%any + type=transport + authby=psk + auto=route + +conn input + leftsubnet=%dynamic[udp/4789] + type=transport + authby=psk + auto=route +---- + +Then generate a preshared key with + +---- +openssl rand -base64 128 +---- + +and copy the key in /etc/ipsec.secrets + +---- +: PSK +---- -- 2.30.2