blob: f272aafdb3f0a36cd9b82db637ac39f564590316 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
:lastproofread: 2021-06-28
.. _examples-azure-vpn-bgp:
Route-Based Site-to-Site VPN to Azure (BGP over IKEv2/IPsec)
------------------------------------------------------------
This guide shows an example of a route-based IKEv2 site-to-site VPN to
Azure using VTI and BGP for dynamic routing updates.
For redundant / active-active configurations see
:ref:`examples-azure-vpn-dual-bgp`
Prerequisites
^^^^^^^^^^^^^
- A pair of Azure VNet Gateways deployed in active-passive
configuration with BGP enabled.
- A local network gateway deployed in Azure representing
the Vyos device, matching the below Vyos settings except for
address space, which only requires the Vyos private IP, in
this example 10.10.0.5/32
- A connection resource deployed in Azure linking the
Azure VNet gateway and the local network gateway representing
the Vyos device.
Example
^^^^^^^
+---------------------------------------+---------------------+
| WAN Interface | eth0 |
+---------------------------------------+---------------------+
| On-premises address space | 10.10.0.0/16 |
+---------------------------------------+---------------------+
| Azure address space | 10.0.0.0/16 |
+---------------------------------------+---------------------+
| Vyos public IP | 198.51.100.3 |
+---------------------------------------+---------------------+
| Vyos private IP | 10.10.0.5 |
+---------------------------------------+---------------------+
| Azure VNet Gateway public IP | 203.0.113.2 |
+---------------------------------------+---------------------+
| Azure VNet Gateway BGP IP | 10.0.0.4 |
+---------------------------------------+---------------------+
| Pre-shared key | ch00s3-4-s3cur3-psk |
+---------------------------------------+---------------------+
| Vyos ASN | 64499 |
+---------------------------------------+---------------------+
| Azure ASN | 65540 |
+---------------------------------------+---------------------+
Vyos configuration
^^^^^^^^^^^^^^^^^^
- Configure the IKE and ESP settings to match a subset
of those supported by Azure:
.. code-block:: none
set vpn ipsec esp-group AZURE lifetime '3600'
set vpn ipsec esp-group AZURE mode 'tunnel'
set vpn ipsec esp-group AZURE pfs 'dh-group2'
set vpn ipsec esp-group AZURE proposal 1 encryption 'aes256'
set vpn ipsec esp-group AZURE proposal 1 hash 'sha1'
set vpn ipsec ike-group AZURE dead-peer-detection action 'restart'
set vpn ipsec ike-group AZURE dead-peer-detection interval '15'
set vpn ipsec ike-group AZURE dead-peer-detection timeout '30'
set vpn ipsec ike-group AZURE ikev2-reauth
set vpn ipsec ike-group AZURE key-exchange 'ikev2'
set vpn ipsec ike-group AZURE lifetime '28800'
set vpn ipsec ike-group AZURE proposal 1 dh-group '2'
set vpn ipsec ike-group AZURE proposal 1 encryption 'aes256'
set vpn ipsec ike-group AZURE proposal 1 hash 'sha1'
- Enable IPsec on eth0
.. code-block:: none
set vpn ipsec interface 'eth0'
- Configure a VTI with a dummy IP address
.. code-block:: none
set interfaces vti vti1 address '10.10.1.5/32'
set interfaces vti vti1 description 'Azure Tunnel'
- Clamp the VTI's MSS to 1350 to avoid PMTU blackholes.
.. code-block:: none
set interfaces vti vti1 ip adjust-mss 1350
- Configure the VPN tunnel
.. code-block:: none
set vpn ipsec authentication psk azure id '198.51.100.3'
set vpn ipsec authentication psk azure id '203.0.113.2'
set vpn ipsec authentication psk azure secret 'ch00s3-4-s3cur3-psk'
set vpn ipsec site-to-site peer azure authentication local-id '198.51.100.3'
set vpn ipsec site-to-site peer 203.0.113.2 authentication mode 'pre-shared-secret'
set vpn ipsec site-to-site peer 203.0.113.2 authentication remote-id '203.0.113.2'
set vpn ipsec site-to-site peer 203.0.113.2 connection-type 'respond'
set vpn ipsec site-to-site peer 203.0.113.2 description 'AZURE PRIMARY TUNNEL'
set vpn ipsec site-to-site peer 203.0.113.2 ike-group 'AZURE'
set vpn ipsec site-to-site peer 203.0.113.2 ikev2-reauth 'inherit'
set vpn ipsec site-to-site peer 203.0.113.2 local-address '10.10.0.5'
set vpn ipsec site-to-site peer azure remote-address '203.0.113.2'
set vpn ipsec site-to-site peer 203.0.113.2 vti bind 'vti1'
set vpn ipsec site-to-site peer 203.0.113.2 vti esp-group 'AZURE'
- **Important**: Add an interface route to reach Azure's BGP listener
.. code-block:: none
set protocols static route 10.0.0.4/32 interface vti1
- Configure your BGP settings
.. code-block:: none
set protocols bgp system-as 64499
set protocols bgp neighbor 10.0.0.4 remote-as '65540'
set protocols bgp neighbor 10.0.0.4 address-family ipv4-unicast soft-reconfiguration 'inbound'
set protocols bgp neighbor 10.0.0.4 timers holdtime '30'
set protocols bgp neighbor 10.0.0.4 timers keepalive '10'
- **Important**: Disable connected check \
.. code-block:: none
set protocols bgp neighbor 10.0.0.4 disable-connected-check
|
