Site-To-Site

Contents

This scenario shows how to configure and connect two subnets with each other through a VPN tunnel set up between the two gateways. One end-point receives the local IP through DHCP.

Test Site-To-Site Responder With Dynamic IP

Description

Simple VPN site-to-site configuration to connect two subnets. DUT0 acts as a responder so it only sets the tunnel up when an incoming connection is received. Instead of listening on a pre-configured IP address, the local end-point IP is received through DHCP.

Scenario

Step 1: Set the following configuration in DUT2:

set interfaces eth0.100 address 90.0.0.1/24
set interfaces eth1.200 address 80.0.0.1/24
set service dhcp-server shared-network dhcpserver subnet 90.0.0.0/24 start 90.0.0.2 stop 90.0.0.2

Step 2: Set the following configuration in DUT0:

set interfaces eth0.100 address dhcp
set interfaces dum0 address 10.1.0.1/24
set vpn ipsec site-to-site peer PEER dhcp-interface eth0.100
set vpn ipsec site-to-site peer PEER remote-address 80.0.0.2
set vpn ipsec site-to-site peer PEER tunnel 1 local prefix 10.1.0.0/24
set vpn ipsec site-to-site peer PEER tunnel 1 remote prefix 10.3.0.0/24
set vpn ipsec site-to-site peer PEER tunnel 1 local-interface dum0
set protocols static route 0.0.0.0/0 interface dum0
set protocols static route 80.0.0.0/24 next-hop 90.0.0.1
set vpn ipsec auth-profile AUTH-SA local auth pre-shared-secret test
set vpn ipsec esp-group CHILD-SA proposal 1 encryption aes256gcm128
set vpn ipsec esp-group CHILD-SA proposal 1 pfs dh-group19
set vpn ipsec ike-group IKE-SA key-exchange ikev2
set vpn ipsec ike-group IKE-SA proposal 1 dh-group 19
set vpn ipsec ike-group IKE-SA proposal 1 encryption aes256gcm128
set vpn ipsec ike-group IKE-SA proposal 1 hash sha256
set vpn ipsec site-to-site peer PEER auth-profile AUTH-SA
set vpn ipsec site-to-site peer PEER default-esp-group CHILD-SA
set vpn ipsec site-to-site peer PEER ike-group IKE-SA
set vpn ipsec site-to-site peer PEER connection-type respond

Step 3: Run command interfaces ethernet eth0 vif 100 show at DUT0 and check if output contains the following tokens:

90.0.0.2

Show output

---------------------------------------------------------------------
  Name             IP Address           Admin  Oper  Vrf  Description
---------------------------------------------------------------------
eth0.100  90.0.0.2/24                   up     up
          fe80::dcad:beff:feef:6c10/64

Step 4: Set the following configuration in DUT1:

set interfaces eth0.200 address 80.0.0.2/24
set interfaces dum0 address 10.3.0.1/24
set vpn ipsec site-to-site peer PEER local-address 80.0.0.2
set vpn ipsec site-to-site peer PEER remote-address 90.0.0.2
set vpn ipsec site-to-site peer PEER tunnel 1 local prefix 10.3.0.0/24
set vpn ipsec site-to-site peer PEER tunnel 1 remote prefix 10.1.0.0/24
set vpn ipsec site-to-site peer PEER tunnel 1 local-interface dum0
set protocols static route 0.0.0.0/0 interface dum0
set protocols static route 90.0.0.0/24 next-hop 80.0.0.1
set vpn ipsec auth-profile AUTH-SA local auth pre-shared-secret test
set vpn ipsec esp-group CHILD-SA proposal 1 encryption aes256gcm128
set vpn ipsec esp-group CHILD-SA proposal 1 pfs dh-group19
set vpn ipsec ike-group IKE-SA key-exchange ikev2
set vpn ipsec ike-group IKE-SA proposal 1 dh-group 19
set vpn ipsec ike-group IKE-SA proposal 1 encryption aes256gcm128
set vpn ipsec ike-group IKE-SA proposal 1 hash sha256
set vpn ipsec site-to-site peer PEER auth-profile AUTH-SA
set vpn ipsec site-to-site peer PEER default-esp-group CHILD-SA
set vpn ipsec site-to-site peer PEER ike-group IKE-SA
set vpn ipsec site-to-site peer PEER connection-type initiate

Step 5: Ping IP address 80.0.0.2 from DUT0:

admin@DUT0$ ping 80.0.0.2 count 1 size 56 timeout 1

Show output

PING 80.0.0.2 (80.0.0.2) 56(84) bytes of data.
64 bytes from 80.0.0.2: icmp_seq=1 ttl=63 time=0.587 ms

--- 80.0.0.2 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.587/0.587/0.587/0.000 ms

Step 6: Run command vpn ipsec show sa at DUT1 and check if output matches the following regular expressions:

peer-PEER-tunnel-\d+.+INSTALLED

Show output

vpn-peer-PEER: #1, ESTABLISHED, IKEv2, 7ab7c02555ba043c_i* 0088c59b65b5daec_r
  local  '80.0.0.2' @ 80.0.0.2[500]
  remote '90.0.0.2' @ 90.0.0.2[500]
  AES_GCM_16-256/PRF_HMAC_SHA2_256/ECP_256
  established 0s ago, rekeying in 15527s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 0s ago, rekeying in 3331s, expires in 3960s
    in  c9e7483b,      0 bytes,     0 packets
    out ce16600e,      0 bytes,     0 packets
    local  10.3.0.0/24
    remote 10.1.0.0/24

Step 7: Run command vpn ipsec show sa at DUT0 and check if output matches the following regular expressions:

peer-PEER-tunnel-\d+.+INSTALLED

Show output

vpn-peer-PEER: #1, ESTABLISHED, IKEv2, 7ab7c02555ba043c_i 0088c59b65b5daec_r*
  local  '90.0.0.2' @ 90.0.0.2[500]
  remote '80.0.0.2' @ 80.0.0.2[500]
  AES_GCM_16-256/PRF_HMAC_SHA2_256/ECP_256
  established 0s ago, rekeying in 24212s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 0s ago, rekeying in 3269s, expires in 3960s
    in  ce16600e,      0 bytes,     0 packets
    out c9e7483b,      0 bytes,     0 packets
    local  10.1.0.0/24
    remote 10.3.0.0/24

Step 8: Ping IP address 10.1.0.1 from DUT1:

admin@DUT1$ ping 10.1.0.1 local-address 10.3.0.1 count 1 size 56 timeout 1

Show output

PING 10.1.0.1 (10.1.0.1) from 10.3.0.1 : 56(84) bytes of data.
64 bytes from 10.1.0.1: icmp_seq=1 ttl=64 time=0.633 ms

--- 10.1.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.633/0.633/0.633/0.000 ms

Step 9: Ping IP address 10.3.0.1 from DUT0:

admin@DUT0$ ping 10.3.0.1 local-address 10.1.0.1 count 1 size 56 timeout 1

Show output

PING 10.3.0.1 (10.3.0.1) from 10.1.0.1 : 56(84) bytes of data.
64 bytes from 10.3.0.1: icmp_seq=1 ttl=64 time=0.901 ms

--- 10.3.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.901/0.901/0.901/0.000 ms

Step 10: Run command vpn ipsec show sa at DUT0 and check if output matches the following regular expressions:

[1-9]\d? packets

Show output

vpn-peer-PEER: #1, ESTABLISHED, IKEv2, 7ab7c02555ba043c_i 0088c59b65b5daec_r*
  local  '90.0.0.2' @ 90.0.0.2[500]
  remote '80.0.0.2' @ 80.0.0.2[500]
  AES_GCM_16-256/PRF_HMAC_SHA2_256/ECP_256
  established 1s ago, rekeying in 24211s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 1s ago, rekeying in 3268s, expires in 3959s
    in  ce16600e,    168 bytes,     2 packets,     0s ago
    out c9e7483b,    168 bytes,     2 packets,     0s ago
    local  10.1.0.0/24
    remote 10.3.0.0/24

Step 11: Run command vpn ipsec show sa at DUT1 and check if output matches the following regular expressions:

[1-9]\d? packets

Show output

vpn-peer-PEER: #1, ESTABLISHED, IKEv2, 7ab7c02555ba043c_i* 0088c59b65b5daec_r
  local  '80.0.0.2' @ 80.0.0.2[500]
  remote '90.0.0.2' @ 90.0.0.2[500]
  AES_GCM_16-256/PRF_HMAC_SHA2_256/ECP_256
  established 1s ago, rekeying in 15526s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 1s ago, rekeying in 3330s, expires in 3959s
    in  c9e7483b,    168 bytes,     2 packets,     0s ago
    out ce16600e,    168 bytes,     2 packets,     0s ago
    local  10.3.0.0/24
    remote 10.1.0.0/24

Attention

The command vpn show ipsec policy can be used to debug the IPSec selectors that have been installed in OSDx devices. Example for device DUT0:

Show output

src 10.1.0.0/24 dst 10.3.0.0/24 dev dum0
        dir out priority 375421
        tmpl src 90.0.0.2 dst 80.0.0.2
                proto esp spi 0xc9e7483b reqid 1 mode tunnel
src 10.3.0.0/24 dst 10.1.0.0/24
        dir fwd priority 375423
        tmpl src 80.0.0.2 dst 90.0.0.2
                proto esp reqid 1 mode tunnel
src 10.3.0.0/24 dst 10.1.0.0/24
        dir in priority 375423
        tmpl src 80.0.0.2 dst 90.0.0.2
                proto esp reqid 1 mode tunnel
src 0.0.0.0/0 dst 0.0.0.0/0
        socket in priority 0
src 0.0.0.0/0 dst 0.0.0.0/0
        socket out priority 0
src 0.0.0.0/0 dst 0.0.0.0/0
        socket in priority 0
src 0.0.0.0/0 dst 0.0.0.0/0
        socket out priority 0
src ::/0 dst ::/0
        socket in priority 0
src ::/0 dst ::/0
        socket out priority 0
src ::/0 dst ::/0
        socket in priority 0
src ::/0 dst ::/0
        socket out priority 0

---

Test Site-To-Site Initiator With Dynamic IP

Description

Simple VPN site-to-site configuration to connect two subnets. DUT0 acts as a initiator, so it automatically attempts to start the tunnel as soon as a local IP address is assigned through DHCP.

Scenario

Step 1: Set the following configuration in DUT2:

set interfaces eth0.100 address 90.0.0.1/24
set interfaces eth1.200 address 80.0.0.1/24
set service dhcp-server shared-network dhcpserver subnet 90.0.0.0/24 start 90.0.0.2 stop 90.0.0.2

Step 2: Set the following configuration in DUT1:

set interfaces eth0.200 address 80.0.0.2/24
set interfaces dum0 address 10.3.0.1/24
set vpn ipsec site-to-site peer PEER local-address 80.0.0.2
set vpn ipsec site-to-site peer PEER remote-address 90.0.0.2
set vpn ipsec site-to-site peer PEER tunnel 1 local prefix 10.3.0.0/24
set vpn ipsec site-to-site peer PEER tunnel 1 remote prefix 10.1.0.0/24
set vpn ipsec site-to-site peer PEER tunnel 1 local-interface dum0
set protocols static route 0.0.0.0/0 interface dum0
set protocols static route 90.0.0.0/24 next-hop 80.0.0.1
set vpn ipsec auth-profile AUTH-SA local auth pre-shared-secret test
set vpn ipsec esp-group CHILD-SA proposal 1 encryption aes256gcm128
set vpn ipsec esp-group CHILD-SA proposal 1 pfs dh-group19
set vpn ipsec ike-group IKE-SA key-exchange ikev2
set vpn ipsec ike-group IKE-SA proposal 1 dh-group 19
set vpn ipsec ike-group IKE-SA proposal 1 encryption aes256gcm128
set vpn ipsec ike-group IKE-SA proposal 1 hash sha256
set vpn ipsec site-to-site peer PEER auth-profile AUTH-SA
set vpn ipsec site-to-site peer PEER default-esp-group CHILD-SA
set vpn ipsec site-to-site peer PEER ike-group IKE-SA
set vpn ipsec site-to-site peer PEER connection-type respond

Step 3: Set the following configuration in DUT0:

set interfaces eth0.100 address dhcp
set interfaces dum0 address 10.1.0.1/24
set vpn ipsec site-to-site peer PEER dhcp-interface eth0.100
set vpn ipsec site-to-site peer PEER remote-address 80.0.0.2
set vpn ipsec site-to-site peer PEER tunnel 1 local prefix 10.1.0.0/24
set vpn ipsec site-to-site peer PEER tunnel 1 remote prefix 10.3.0.0/24
set vpn ipsec site-to-site peer PEER tunnel 1 local-interface dum0
set protocols static route 0.0.0.0/0 interface dum0
set protocols static route 80.0.0.0/24 next-hop 90.0.0.1
set vpn ipsec auth-profile AUTH-SA local auth pre-shared-secret test
set vpn ipsec esp-group CHILD-SA proposal 1 encryption aes256gcm128
set vpn ipsec esp-group CHILD-SA proposal 1 pfs dh-group19
set vpn ipsec ike-group IKE-SA key-exchange ikev2
set vpn ipsec ike-group IKE-SA proposal 1 dh-group 19
set vpn ipsec ike-group IKE-SA proposal 1 encryption aes256gcm128
set vpn ipsec ike-group IKE-SA proposal 1 hash sha256
set vpn ipsec site-to-site peer PEER auth-profile AUTH-SA
set vpn ipsec site-to-site peer PEER default-esp-group CHILD-SA
set vpn ipsec site-to-site peer PEER ike-group IKE-SA
set vpn ipsec site-to-site peer PEER connection-type initiate

Step 4: Run command interfaces ethernet eth0 vif 100 show at DUT0 and check if output contains the following tokens:

90.0.0.2

Show output

---------------------------------------------------------------------
  Name             IP Address           Admin  Oper  Vrf  Description
---------------------------------------------------------------------
eth0.100  90.0.0.2/24                   up     up
          fe80::dcad:beff:feef:6c10/64

Step 5: Ping IP address 80.0.0.2 from DUT0:

admin@DUT0$ ping 80.0.0.2 count 1 size 56 timeout 1

Show output

PING 80.0.0.2 (80.0.0.2) 56(84) bytes of data.
64 bytes from 80.0.0.2: icmp_seq=1 ttl=63 time=0.625 ms

--- 80.0.0.2 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.625/0.625/0.625/0.000 ms

Step 6: Run command vpn ipsec show sa at DUT0 and check if output matches the following regular expressions:

peer-PEER-tunnel-\d+.+INSTALLED

Show output

vpn-peer-PEER: #1, ESTABLISHED, IKEv2, 10a2abcc93017cd1_i* 1b0551780aad292a_r
  local  '90.0.0.2' @ 90.0.0.2[500]
  remote '80.0.0.2' @ 80.0.0.2[500]
  AES_GCM_16-256/PRF_HMAC_SHA2_256/ECP_256
  established 2s ago, rekeying in 18141s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 2s ago, rekeying in 3462s, expires in 3958s
    in  c5cf1bfd,      0 bytes,     0 packets
    out ce481de3,      0 bytes,     0 packets
    local  10.1.0.0/24
    remote 10.3.0.0/24

Step 7: Run command vpn ipsec show sa at DUT1 and check if output matches the following regular expressions:

peer-PEER-tunnel-\d+.+INSTALLED

Show output

vpn-peer-PEER: #1, ESTABLISHED, IKEv2, 10a2abcc93017cd1_i 1b0551780aad292a_r*
  local  '80.0.0.2' @ 80.0.0.2[500]
  remote '90.0.0.2' @ 90.0.0.2[500]
  AES_GCM_16-256/PRF_HMAC_SHA2_256/ECP_256
  established 2s ago, rekeying in 25954s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 2s ago, rekeying in 3305s, expires in 3958s
    in  ce481de3,      0 bytes,     0 packets
    out c5cf1bfd,      0 bytes,     0 packets
    local  10.3.0.0/24
    remote 10.1.0.0/24

Step 8: Ping IP address 10.3.0.1 from DUT0:

admin@DUT0$ ping 10.3.0.1 local-address 10.1.0.1 count 1 size 56 timeout 1

Show output

PING 10.3.0.1 (10.3.0.1) from 10.1.0.1 : 56(84) bytes of data.
64 bytes from 10.3.0.1: icmp_seq=1 ttl=64 time=0.732 ms

--- 10.3.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.732/0.732/0.732/0.000 ms

Step 9: Ping IP address 10.1.0.1 from DUT1:

admin@DUT1$ ping 10.1.0.1 local-address 10.3.0.1 count 1 size 56 timeout 1

Show output

PING 10.1.0.1 (10.1.0.1) from 10.3.0.1 : 56(84) bytes of data.
64 bytes from 10.1.0.1: icmp_seq=1 ttl=64 time=0.601 ms

--- 10.1.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.601/0.601/0.601/0.000 ms

Step 10: Run command vpn ipsec show sa at DUT0 and check if output matches the following regular expressions:

[1-9]\d? packets

Show output

vpn-peer-PEER: #1, ESTABLISHED, IKEv2, 10a2abcc93017cd1_i* 1b0551780aad292a_r
  local  '90.0.0.2' @ 90.0.0.2[500]
  remote '80.0.0.2' @ 80.0.0.2[500]
  AES_GCM_16-256/PRF_HMAC_SHA2_256/ECP_256
  established 3s ago, rekeying in 18140s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 3s ago, rekeying in 3461s, expires in 3957s
    in  c5cf1bfd,    168 bytes,     2 packets,     0s ago
    out ce481de3,    168 bytes,     2 packets,     0s ago
    local  10.1.0.0/24
    remote 10.3.0.0/24

Step 11: Run command vpn ipsec show sa at DUT1 and check if output matches the following regular expressions:

[1-9]\d? packets

Show output

vpn-peer-PEER: #1, ESTABLISHED, IKEv2, 10a2abcc93017cd1_i 1b0551780aad292a_r*
  local  '80.0.0.2' @ 80.0.0.2[500]
  remote '90.0.0.2' @ 90.0.0.2[500]
  AES_GCM_16-256/PRF_HMAC_SHA2_256/ECP_256
  established 2s ago, rekeying in 25954s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 2s ago, rekeying in 3305s, expires in 3958s
    in  ce481de3,    168 bytes,     2 packets,     0s ago
    out c5cf1bfd,    168 bytes,     2 packets,     0s ago
    local  10.3.0.0/24
    remote 10.1.0.0/24

Attention

The command vpn show ipsec policy can be used to debug the IPSec selectors that have been installed in OSDx devices. Example for device DUT0:

Show output

src 10.1.0.0/24 dst 10.3.0.0/24 dev dum0
        dir out priority 375421
        tmpl src 90.0.0.2 dst 80.0.0.2
                proto esp spi 0xce481de3 reqid 1 mode tunnel
src 10.3.0.0/24 dst 10.1.0.0/24
        dir fwd priority 375423
        tmpl src 80.0.0.2 dst 90.0.0.2
                proto esp reqid 1 mode tunnel
src 10.3.0.0/24 dst 10.1.0.0/24
        dir in priority 375423
        tmpl src 80.0.0.2 dst 90.0.0.2
                proto esp reqid 1 mode tunnel
src 0.0.0.0/0 dst 0.0.0.0/0
        socket in priority 0
src 0.0.0.0/0 dst 0.0.0.0/0
        socket out priority 0
src 0.0.0.0/0 dst 0.0.0.0/0
        socket in priority 0
src 0.0.0.0/0 dst 0.0.0.0/0
        socket out priority 0
src ::/0 dst ::/0
        socket in priority 0
src ::/0 dst ::/0
        socket out priority 0
src ::/0 dst ::/0
        socket in priority 0
src ::/0 dst ::/0
        socket out priority 0

---