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IPsec Site-to-Site VPN FortiGate <-> Juniper SSG

IPsec Site-to-Site VPN FortiGate <-> Juniper SSG
Here comes the step-by-step guide for building a site-to-site VPN between a FortiGate and a ScreenOS firewall. Not much to say. I am publishing several screenshots and CLI listings of both firewalls, along with an overview of my laboratory.


The devices tested are a Juniper SSG 5 (6.3.0r18.0) and a FortiWiFi 90D (v5.2.2).

Lab

The following figure shows the lab I used for this test:
S2S VPN FortiGate - Juniper SSG Laboratory

FortiGate

The FortiGate firewall is configured in the following way. See the image descriptions for more details.

Juniper SSG

Similar for the ScreenOS device.

Monitoring

If everything is configured correctly, the following menus should reveal the established VPN tunnel:
Alternatively, the CLI can be used:
FortiGate:

SSG:
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fd-wv-fw01-> get ike cookies
 
IKEv1 SA -- Active: 10, Dead: 0, Total 10
 
80102f/0003, 172.16.1.6:500->172.16.1.1:500, PRESHR/grp14/AES256/SHA2-256, xchg(5) (fd-wv-fw04/grp-1/usr-1)
resent-tmr 322 lifetime 28800 lt-recv 28800 nxt_rekey 23327 cert-expire 0
responder, err cnt 0, send dir 1, cond 0x0
nat-traversal map not available
ike heartbeat              : disabled
ike heartbeat last rcv time: 0
ike heartbeat last snd time: 0
XAUTH status: 0
DPD seq local 18345669, peer 419049
 
fd-wv-fw01->
fd-wv-fw01->
fd-wv-fw01-> get sa id 0x0000000e
index 7, name fd-wv-fw04, peer gateway ip 172.16.1.6. vsys
auto key. tunnel if binding node, tunnel mode, policy id in:<-1> out:<-1> vpngrp:<-1>. sa_list_nxt:<-1>.
tunnel id 14, peer id 7, NSRP Local.     site-to-site. Local interface is ethernet0/6 <172.16.1.1>.
  esp, group 14, a256 encryption, s256 authentication
  autokey, IN active, OUT active
  monitor<1>, latency: 1, availability: 100
  DF bit: clear
  app_sa_flags: 0x24001a7
  proxy id: local 0.0.0.0/0.0.0.0, remote 0.0.0.0/0.0.0.0, proto 0, port 0/0
  ike activity timestamp: 1882685177
  DSCP-mark : disabled
nat-traversal map not available
incoming: SPI f41f6f87, flag 00004000, tunnel info 4000000e, pipeline
  life 3600 sec, 2869 remain, 0 kb, 0 bytes remain
  anti-replay on, last 0x49, window 0xffffffff, idle timeout value <0>, idled 6 seconds
  next pak sequence number: 0x0
  bytes/paks:8280316/188189; sw bytes/paks:8280316/188189
outgoing: SPI c97b0d00, flag 00000000, tunnel info 4000000e, pipeline
  life 3600 sec, 2869 remain, 0 kb, 0 bytes remain
  anti-replay on, last 0x0, window 0x0, idle timeout value <0>, idled 6 seconds
  next pak sequence number: 0x49
  bytes/paks:8303592/188718; sw bytes/paks:8303592/188718

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