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 ethernet eth0 vif 100 address 90.0.0.1/24
set interfaces ethernet eth1 vif 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
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 2: Set the following configuration in DUT0 :

set interfaces dummy dum0 address 10.1.0.1/24
set interfaces ethernet eth0 vif 100 address dhcp
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 system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
set vpn ipsec auth-profile AUTH-SA local auth encrypted-pre-shared-secret U2FsdGVkX18p3m8tEDqAuezy+gN6n1SPD2wOK69l36w=
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 connection-type respond
set vpn ipsec site-to-site peer PEER default-esp-group CHILD-SA
set vpn ipsec site-to-site peer PEER dhcp-interface eth0.100
set vpn ipsec site-to-site peer PEER ike-group IKE-SA
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 local-interface dum0
set vpn ipsec site-to-site peer PEER tunnel 1 remote prefix 10.3.0.0/24

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:6c00/64

Step 4: Set the following configuration in DUT1 :

set interfaces dummy dum0 address 10.3.0.1/24
set interfaces ethernet eth0 vif 200 address 80.0.0.2/24
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 system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
set vpn ipsec auth-profile AUTH-SA local auth encrypted-pre-shared-secret U2FsdGVkX1/v+0aR2rWlHWh1pboj0e6PjqRinzbrMgw=
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 connection-type initiate
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 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 local-interface dum0
set vpn ipsec site-to-site peer PEER tunnel 1 remote prefix 10.1.0.0/24

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=0.576 ms

--- 80.0.0.2 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.576/0.576/0.576/0.000 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, 7506a2c32c566cca_i* 6288fe87d26ef0ce_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 19267s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 1s ago, rekeying in 3508s, expires in 3959s
    in  c086309f,      0 bytes,     0 packets
    out cef74290,      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, 7506a2c32c566cca_i 6288fe87d26ef0ce_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 17619s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 1s ago, rekeying in 3344s, expires in 3959s
    in  cef74290,      0 bytes,     0 packets
    out c086309f,      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=0.682 ms

--- 10.1.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.682/0.682/0.682/0.000 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=3.37 ms

--- 10.3.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 3.367/3.367/3.367/0.000 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, 7506a2c32c566cca_i 6288fe87d26ef0ce_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 17619s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 1s ago, rekeying in 3344s, expires in 3959s
    in  cef74290,    168 bytes,     2 packets,     1s ago
    out c086309f,    168 bytes,     2 packets,     1s 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, 7506a2c32c566cca_i* 6288fe87d26ef0ce_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 19266s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 2s ago, rekeying in 3507s, expires in 3958s
    in  c086309f,    168 bytes,     2 packets,     1s ago
    out cef74290,    168 bytes,     2 packets,     1s 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 0xc086309f 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 ethernet eth0 vif 100 address 90.0.0.1/24
set interfaces ethernet eth1 vif 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
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 2: Set the following configuration in DUT1 :

set interfaces dummy dum0 address 10.3.0.1/24
set interfaces ethernet eth0 vif 200 address 80.0.0.2/24
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 system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
set vpn ipsec auth-profile AUTH-SA local auth encrypted-pre-shared-secret U2FsdGVkX18WBKG6vOJGmdG+lm05QqzU06Sc3fWxlXA=
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 connection-type respond
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 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 local-interface dum0
set vpn ipsec site-to-site peer PEER tunnel 1 remote prefix 10.1.0.0/24

Step 3: Set the following configuration in DUT0 :

set interfaces dummy dum0 address 10.1.0.1/24
set interfaces ethernet eth0 vif 100 address dhcp
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 system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
set vpn ipsec auth-profile AUTH-SA local auth encrypted-pre-shared-secret U2FsdGVkX18Srb2/SNWz8QM4WaF0SFd6omRQF7KcWj8=
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 connection-type initiate
set vpn ipsec site-to-site peer PEER default-esp-group CHILD-SA
set vpn ipsec site-to-site peer PEER dhcp-interface eth0.100
set vpn ipsec site-to-site peer PEER ike-group IKE-SA
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 local-interface dum0
set vpn ipsec site-to-site peer PEER tunnel 1 remote prefix 10.3.0.0/24

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:6c00/64

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=6.03 ms

--- 80.0.0.2 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 6.034/6.034/6.034/0.000 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, bcd1db574fbb380f_i* 6bb8270633935b4b_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 16277s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 1s ago, rekeying in 3238s, expires in 3959s
    in  c164bf80,      0 bytes,     0 packets
    out ca9108ca,      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, bcd1db574fbb380f_i 6bb8270633935b4b_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 22024s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 1s ago, rekeying in 3449s, expires in 3959s
    in  ca9108ca,      0 bytes,     0 packets
    out c164bf80,      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=0.813 ms

--- 10.3.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.813/0.813/0.813/0.000 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=0.581 ms

--- 10.1.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.581/0.581/0.581/0.000 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, bcd1db574fbb380f_i* 6bb8270633935b4b_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 16277s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 1s ago, rekeying in 3238s, expires in 3959s
    in  c164bf80,    168 bytes,     2 packets,     0s ago
    out ca9108ca,    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, bcd1db574fbb380f_i 6bb8270633935b4b_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 22023s
  peer-PEER-tunnel-1: #1, reqid 1, INSTALLED, TUNNEL, ESP:AES_GCM_16-256
    installed 2s ago, rekeying in 3448s, expires in 3958s
    in  ca9108ca,    168 bytes,     2 packets,     0s ago
    out c164bf80,    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 0xca9108ca 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

---