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Update site2site_ipsec.rst #1118

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Oct 19, 2023
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Update site2site_ipsec.rst #1118

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27 changes: 24 additions & 3 deletions docs/configuration/vpn/site2site_ipsec.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -280,17 +280,31 @@ Imagine the following topology

IPSec IKEv2 site2site VPN (source ./draw.io/vpn_s2s_ikev2.drawio)

**LEFT:**
* WAN interface on `eth0.201`
* `eth0.201` interface IP: `172.18.201.10/24`
* `vti10` interface IP: `10.0.0.2/31`
* `dum0` interface IP: `10.0.11.1/24` (for testing purposes)

**RIGHT:**
* WAN interface on `eth0.202`
* `eth0.201` interface IP: `172.18.202.10/24`
* `vti10` interface IP: `10.0.0.3/31`
* `dum0` interface IP: `10.0.12.1/24` (for testing purposes)

.. note:: Don't get confused about the used /31 tunnel subnet. :rfc:`3021`
gives you additional information for using /31 subnets on point-to-point
links.

**left**
**LEFT**

.. code-block:: none

set interfaces ethernet eth0 vif 201 address '172.18.201.10/24'
set interfaces dummy dum0 address '10.0.11.1/24'
set interfaces vti vti10 address '10.0.0.2/31'

set vpn ipsec option disable-route-autoinstall
set vpn ipsec authentication psk OFFICE-B id '172.18.201.10'
set vpn ipsec authentication psk OFFICE-B id '172.18.202.10'
set vpn ipsec authentication psk OFFICE-B secret 'secretkey'
Expand All @@ -311,17 +325,22 @@ Imagine the following topology
set vpn ipsec site-to-site peer OFFICE-B authentication remote-id '172.18.202.10'
set vpn ipsec site-to-site peer OFFICE-B connection-type 'respond'
set vpn ipsec site-to-site peer OFFICE-B ike-group 'IKEv2_DEFAULT'
set vpn ipsec site-to-site peer OFFICE-B local-address '192.168.0.10'
set vpn ipsec site-to-site peer OFFICE-B local-address '172.18.201.10'
set vpn ipsec site-to-site peer OFFICE-B remote-address '172.18.202.10'
set vpn ipsec site-to-site peer OFFICE-B vti bind 'vti10'
set vpn ipsec site-to-site peer OFFICE-B vti esp-group 'ESP_DEFAULT'

**right**
set protocols static interface-route 10.0.12.0/24 next-hop-interface vti10

**RIGHT**

.. code-block:: none

set interfaces ethernet eth0 vif 202 address '172.18.202.10/24'
set interfaces dummy dum0 address '10.0.12.1/24'
set interfaces vti vti10 address '10.0.0.3/31'

set vpn ipsec option disable-route-autoinstall
set vpn ipsec authentication psk OFFICE-A id '172.18.201.10'
set vpn ipsec authentication psk OFFICE-A id '172.18.202.10'
set vpn ipsec authentication psk OFFICE-A secret 'secretkey'
Expand Down Expand Up @@ -350,6 +369,8 @@ Imagine the following topology
set vpn ipsec site-to-site peer OFFICE-A vti bind 'vti10'
set vpn ipsec site-to-site peer OFFICE-A vti esp-group 'ESP_DEFAULT'

set protocols static interface-route 10.0.11.0/24 next-hop-interface vti10

Key Parameters:

* ``authentication local-id/remote-id`` - IKE identification is used for
Expand Down