From: Alexandre Derumier <aderumier@odiso.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [PATCH pve-docs 2/2] sdn: add vxlan encryption notes
Date: Mon, 6 Sep 2021 05:57:20 +0200 [thread overview]
Message-ID: <20210906035720.4123158-3-aderumier@odiso.com> (raw)
In-Reply-To: <20210906035720.4123158-1-aderumier@odiso.com>
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
---
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 <generatedbase64key>
+----
--
2.30.2
next prev parent reply other threads:[~2021-09-06 3:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-06 3:57 [pve-devel] [PATCH pve-docs 0/2] sdn: evpn && vxlan improvments Alexandre Derumier
2021-09-06 3:57 ` [pve-devel] [PATCH pve-docs 1/2] pvesdn: add evpn Advertise Subnets && Exit Nodes Local routing options Alexandre Derumier
2021-09-10 12:56 ` [pve-devel] applied: " Thomas Lamprecht
2021-09-06 3:57 ` Alexandre Derumier [this message]
2021-09-10 13:01 ` [pve-devel] applied: [PATCH pve-docs 2/2] sdn: add vxlan encryption notes Thomas Lamprecht
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