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178 lines
6.4 KiB
ReStructuredText
178 lines
6.4 KiB
ReStructuredText
.. _examples-site-2-site-cisco:
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Site-to-Site IPSec VPN to Cisco using FlexVPN
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---------------------------------------------
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This guide shows a sample configuration for FlexVPN site-to-site Internet
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Protocol Security (IPsec)/Generic Routing Encapsulation (GRE) tunnel.
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FlexVPN is a newer "solution" for deployment of VPNs and it utilizes IKEv2 as
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the key exchange protocol. The result is a flexible and scalable VPN solution
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that can be easily adapted to fit various network needs. It can also support a
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variety of encryption methods, including AES and 3DES.
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The lab was built using EVE-NG.
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Configuration
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^^^^^^^^^^^^^^
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VyOS
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=====
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- GRE:
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.. code-block:: none
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set interfaces tunnel tun1 encapsulation 'gre'
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set interfaces tunnel tun1 ip adjust-mss '1336'
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set interfaces tunnel tun1 mtu '1376'
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set interfaces tunnel tun1 remote '10.1.1.6'
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set interfaces tunnel tun1 source-address '88.2.2.1'
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- IPsec:
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.. code-block:: none
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set vpn ipsec authentication psk vyos_cisco_l id 'vyos.net’
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set vpn ipsec authentication psk vyos_cisco_l id 'cisco.hub.net'
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set vpn ipsec authentication psk vyos_cisco_l secret 'secret'
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set vpn ipsec esp-group e1 lifetime '3600'
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set vpn ipsec esp-group e1 mode 'tunnel'
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set vpn ipsec esp-group e1 pfs 'disable'
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set vpn ipsec esp-group e1 proposal 1 encryption 'aes128'
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set vpn ipsec esp-group e1 proposal 1 hash 'sha256'
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set vpn ipsec ike-group i1 key-exchange 'ikev2'
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set vpn ipsec ike-group i1 lifetime '28800'
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set vpn ipsec ike-group i1 proposal 1 dh-group '5'
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set vpn ipsec ike-group i1 proposal 1 encryption 'aes256'
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set vpn ipsec ike-group i1 proposal 1 hash 'sha256'
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set vpn ipsec interface 'eth2'
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set vpn ipsec options disable-route-autoinstall
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set vpn ipsec options flexvpn
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set vpn ipsec options interface 'tun1'
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set vpn ipsec options virtual-ip
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set vpn ipsec site-to-site peer cisco_hub authentication local-id 'vyos.net'
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set vpn ipsec site-to-site peer cisco_hub authentication mode 'pre-shared-secret'
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set vpn ipsec site-to-site peer cisco_hub authentication remote-id 'cisco.hub.net'
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set vpn ipsec site-to-site peer cisco_hub connection-type 'initiate'
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set vpn ipsec site-to-site peer cisco_hub default-esp-group 'e1'
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set vpn ipsec site-to-site peer cisco_hub ike-group 'i1'
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set vpn ipsec site-to-site peer cisco_hub local-address '88.2.2.1'
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set vpn ipsec site-to-site peer cisco_hub remote-address '10.1.1.6'
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set vpn ipsec site-to-site peer cisco_hub tunnel 1 local prefix '88.2.2.1/32'
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set vpn ipsec site-to-site peer cisco_hub tunnel 1 protocol 'gre'
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set vpn ipsec site-to-site peer cisco_hub tunnel 1 remote prefix '10.1.1.6/32'
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set vpn ipsec site-to-site peer cisco_hub virtual-address '0.0.0.0'
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Cisco
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=====
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.. code-block:: none
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aaa new-model
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!
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!
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aaa authorization network default local
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!
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crypto ikev2 name-mangler GET_DOMAIN
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fqdn all
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email all
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!
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!
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crypto ikev2 authorization policy vyos
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pool mypool
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aaa attribute list mylist
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route set interface
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route accept any tag 100 distance 5
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!
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crypto ikev2 keyring mykeys
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peer peer1
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identity fqdn vyos.net
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pre-shared-key local secret
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pre-shared-key remote secret
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crypto ikev2 profile my_profile
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match identity remote fqdn vyos.net
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identity local fqdn cisco.hub.net
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authentication remote pre-share
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authentication local pre-share
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keyring local mykeys
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dpd 10 3 periodic
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aaa authorization group psk list local name-mangler GET_DOMAIN
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aaa authorization user psk cached
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virtual-template 1
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!
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!
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!
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crypto ipsec transform-set TSET esp-aes esp-sha256-hmac
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mode tunnel
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!
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!
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crypto ipsec profile my-ipsec-profile
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set transform-set TSET
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set ikev2-profile my_profile
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!
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interface Virtual-Template1 type tunnel
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no ip address
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ip mtu 1376
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ip nhrp network-id 1
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ip nhrp shortcut virtual-template 1
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ip tcp adjust-mss 1336
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tunnel path-mtu-discovery
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tunnel protection ipsec profile my-ipsec-profile
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!
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ip local pool my_pool 172.16.122.1 172.16.122.254
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Since the tunnel is a point-to-point GRE tunnel, it behaves like any other
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point-to-point interface (for example: serial, dialer), and it is possible to
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run any Interior Gateway Protocol (IGP)/Exterior Gateway Protocol (EGP) over
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the link in order to exchange routing information
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Verification
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^^^^^^^^^^^^
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.. code-block:: none
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vyos@vyos$ show interfaces
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Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
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Interface IP Address S/L Description
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--------- ---------- --- -----------
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eth0 - u/u
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eth1 - u/u
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eth2 88.2.2.1/24 u/u
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eth3 172.16.1.2/24 u/u
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lo 127.0.0.1/8 u/u
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::1/128
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tun1 172.16.122.2/32 u/u
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vyos@vyos:~$ show vpn ipsec sa
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Connection State Uptime Bytes In/Out Packets In/Out Remote address Remote ID Proposal
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------------------ ------- -------- -------------- ---------------- ---------------- --------------------- -----------------------------
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cisco_hub-tunnel-1 up 44m17s 35K/31K 382/367 10.1.1.6 cisco.hub.net AES_CBC_128/HMAC_SHA2_256_128
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Hub#sh crypto ikev2 sa detailed
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IPv4 Crypto IKEv2 SA
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Tunnel-id Local Remote fvrf/ivrf Status
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5 10.1.1.6/4500 88.2.2.1/4500 none/none READY
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Encr: AES-CBC, keysize: 256, PRF: SHA256, Hash: SHA256, DH Grp:5, Auth sign: PSK, Auth verify: PSK
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Life/Active Time: 86400/2694 sec
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CE id: 0, Session-id: 2
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Status Description: Negotiation done
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Local spi: C94EE2DC92A60C47 Remote spi: 9AF0EF151BECF14C
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Local id: cisco.hub.net
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Remote id: vyos.net
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Local req msg id: 269 Remote req msg id: 0
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Local next msg id: 269 Remote next msg id: 0
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Local req queued: 269 Remote req queued: 0
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Local window: 5 Remote window: 1
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DPD configured for 10 seconds, retry 3
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Fragmentation not configured.
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Extended Authentication not configured.
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NAT-T is not detected
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Cisco Trust Security SGT is disabled
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Assigned host addr: 172.16.122.2
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