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diff --git a/docs/appendix/examples/azure-vpn-dual-bgp.rst b/docs/appendix/examples/azure-vpn-dual-bgp.rst new file mode 100644 index 00000000..4cbcde3b --- /dev/null +++ b/docs/appendix/examples/azure-vpn-dual-bgp.rst @@ -0,0 +1,155 @@ +.. _examples-azure-vpn-dual-bgp: + +Route-Based Redundant Site-to-Site VPN to Azure (BGP over IKEv2/IPsec) +---------------------------------------------------------------------- + +This guide shows an example of a redundant (active-active) route-based IKEv2 +site-to-site VPN to Azure using VTI +and BGP for dynamic routing updates. + +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 1 public IP | 203.0.113.2 | ++---------------------------------------+---------------------+ +| Azure VNet Gateway 2 public IP | 203.0.113.3 | ++---------------------------------------+---------------------+ +| Azure VNet Gateway BGP IP | 10.0.0.4,10.0.0.5 | ++---------------------------------------+---------------------+ +| 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:: sh + + set vpn ipsec esp-group AZURE compression 'disable' + 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 'yes' + 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:: sh + + set vpn ipsec ipsec-interfaces interface 'eth0' + +- Configure two VTIs with a dummy IP address each + +.. code-block:: sh + + set interfaces vti vti1 address '10.10.1.5/32' + set interfaces vti vti1 description 'Azure Primary Tunnel' + + set interfaces vti vti2 address '10.10.1.6/32' + set interfaces vti vti2 description 'Azure Secondary Tunnel' + +- Clamp the VTI's MSS to 1350 to avoid PMTU blackholes. + +.. code-block:: sh + + set firewall options interface vti1 adjust-mss 1350 + set firewall options interface vti2 adjust-mss 1350 + +- Configure the VPN tunnels + +.. code-block:: sh + + set vpn ipsec site-to-site peer 203.0.113.2 authentication 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 pre-shared-secret 'ch00s3-4-s3cur3-psk' + 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 203.0.113.2 vti bind 'vti1' + set vpn ipsec site-to-site peer 203.0.113.2 vti esp-group 'AZURE' + + set vpn ipsec site-to-site peer 203.0.113.3 authentication id '198.51.100.3' + set vpn ipsec site-to-site peer 203.0.113.3 authentication mode 'pre-shared-secret' + set vpn ipsec site-to-site peer 203.0.113.3 authentication pre-shared-secret 'ch00s3-4-s3cur3-psk' + set vpn ipsec site-to-site peer 203.0.113.3 authentication remote-id '203.0.113.3' + set vpn ipsec site-to-site peer 203.0.113.3 connection-type 'respond' + set vpn ipsec site-to-site peer 203.0.113.3 description 'AZURE SECONDARY TUNNEL' + set vpn ipsec site-to-site peer 203.0.113.3 ike-group 'AZURE' + set vpn ipsec site-to-site peer 203.0.113.3 ikev2-reauth 'inherit' + set vpn ipsec site-to-site peer 203.0.113.3 local-address '10.10.0.5' + set vpn ipsec site-to-site peer 203.0.113.3 vti bind 'vti2' + set vpn ipsec site-to-site peer 203.0.113.3 vti esp-group 'AZURE' + +- **Important**: Add an interface route to reach both Azure's BGP listeners + +.. code-block:: sh + + set protocols static interface-route 10.0.0.4/32 next-hop-interface vti1 + set protocols static interface-route 10.0.0.5/32 next-hop-interface vti2 + +- Configure your BGP settings + +.. code-block:: sh + + set protocols bgp 64499 neighbor 10.0.0.4 remote-as '65540' + set protocols bgp 64499 neighbor 10.0.0.4 address-family ipv4-unicast soft-reconfiguration 'inbound' + set protocols bgp 64499 neighbor 10.0.0.4 timers holdtime '30' + set protocols bgp 64499 neighbor 10.0.0.4 timers keepalive '10' + + set protocols bgp 64499 neighbor 10.0.0.5 remote-as '65540' + set protocols bgp 64499 neighbor 10.0.0.5 address-family ipv4-unicast soft-reconfiguration 'inbound' + set protocols bgp 64499 neighbor 10.0.0.5 timers holdtime '30' + set protocols bgp 64499 neighbor 10.0.0.5 timers keepalive '10' + +- **Important**: Disable connected check, otherwise the routes learned + from Azure will not be imported into the routing table. + +.. code-block:: sh + + set protocols bgp 64499 neighbor 10.0.0.4 disable-connected-check + set protocols bgp 64499 neighbor 10.0.0.5 disable-connected-check |