{"id":9196,"date":"2025-08-30T04:50:46","date_gmt":"2025-08-30T04:50:46","guid":{"rendered":"https:\/\/pariswells.com\/blog\/?p=9196"},"modified":"2025-08-30T05:11:35","modified_gmt":"2025-08-30T05:11:35","slug":"fortigate-device-to-opnsense-site-to-site-vpn","status":"publish","type":"post","link":"https:\/\/pariswells.com\/blog\/research\/fortigate-device-to-opnsense-site-to-site-vpn","title":{"rendered":"Fortigate Device to Opnsense Site to Site VPN"},"content":{"rendered":"\n

Example IP of OpnSense : 1.1.1.1<\/p>\n\n\n\n

Local IP of OpenSense : 172.40.1.0\/24<\/p>\n\n\n\n

Example IP of Forti : 2.2.2.2<\/p>\n\n\n\n

Local IP of Forti : 192.168.13.0\/24<\/p>\n\n\n\n

Forti Config<\/strong><\/p>\n\n\n\n

( Remember to add Static Routes and Policies with NAT ) <\/p>\n\n\n\n

config vpn ipsec phase1-interface\n    edit \"Forti-Opn\"\n        set interface \"port1\"\n        set ike-version 2\n        set keylife 28800\n        set peertype any\n        set net-device disable\n        set proposal aes256-sha256\n        set dhgrp 14\n        set nattraversal enable\n        set transport auto\n        set remote-gw 1.1.1.1\n        set psksecret \"[REDACTED]\"\n    next\nend\nconfig vpn ipsec phase2-interface\n    edit \"Phase2\"\n        set phase1name \"Forti-Opn\"\n        set proposal aes256-sha256\n        set dhgrp 14\n    next\nend<\/code><\/pre>\n\n\n\n
OpnSense<\/strong> Config<\/strong><\/p>\n\n\n\n
You will need to whitelist VPN Ports on WAN<\/p>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n
<preSharedKey uuid=\"7c6e2937-4669-40c8-8d40-bfb61f263fa2\">\n  <ident>1.1.1.1<\/ident>\n  <remote_ident>2.2.2.2<\/remote_ident>\n  <keyType>PSK<\/keyType>\n  <Key>[REDACTED]<\/Key>\n  <description>FG-PSK<\/description>\n<\/preSharedKey><\/code><\/pre>\n\n\n\n
IPSECConfig<\/p>\n\n\n\n
<Connection uuid=\"42820841-7655-4c82-ba28-69819916dcdb\">\n  <enabled>0<\/enabled>\n  <proposals>aes256-sha256-modp2048<\/proposals>\n  <unique>no<\/unique>\n  <aggressive>0<\/aggressive>\n  <version>2<\/version>\n  <mobike>1<\/mobike>\n  <local_addrs>1.1.1.1<\/local_addrs>\n  <local_port\/>\n  <remote_addrs>2.2.2.2<\/remote_addrs>\n  <remote_port\/>\n  <encap>0<\/encap>\n  <reauth_time\/>\n  <rekey_time\/>\n  <over_time\/>\n  <dpd_delay>10<\/dpd_delay>\n  <dpd_timeout\/>\n  <pools\/>\n  <send_certreq>1<\/send_certreq>\n  <send_cert\/>\n  <keyingtries\/>\n  <description>RLBV -FG-S2S<\/description>\n<\/Connection>\n<local uuid=\"9edd4249-c87d-44ef-8cd7-9db703031d2a\">\n  <enabled>1<\/enabled>\n  <connection>42820841-7655-4c82-ba28-69819916dcdb<\/connection>\n  <round>0<\/round>\n  <auth>psk<\/auth>\n  <id>1.1.1.1<\/id>\n  <eap_id\/>\n  <certs\/>\n  <pubkeys\/>\n  <description>LocalID<\/description>\n<\/local>\n<remote uuid=\"73ad72d2-122f-4faf-9e56-a8cb90f6b8dd\">\n  <enabled>1<\/enabled>\n  <connection>42820841-7655-4c82-ba28-69819916dcdb<\/connection>\n  <round>0<\/round>\n  <auth>psk<\/auth>\n  <id>2.2.2.2<\/id>\n  <eap_id\/>\n  <groups\/>\n  <certs\/>\n  <cacerts\/>\n  <pubkeys\/>\n  <description>RemoteID<\/description>\n<\/remote>\n<child uuid=\"c7fad1f8-a4e8-46bb-9298-ce7af5bedb6a\">\n  <enabled>1<\/enabled>\n  <connection>42820841-7655-4c82-ba28-69819916dcdb<\/connection>\n  <reqid\/>\n  <esp_proposals>aes256-sha256-modp2048<\/esp_proposals>\n  <sha256_96>0<\/sha256_96>\n  <start_action>start<\/start_action>\n  <close_action>none<\/close_action>\n  <dpd_action>clear<\/dpd_action>\n  <mode>tunnel<\/mode>\n  <policies>1<\/policies>\n  <local_ts>172.40.1.0\/24<\/local_ts>\n  <remote_ts>192.168.13.0\/24<\/remote_ts>\n  <rekey_time>3600<\/rekey_time>\n  <description\/>\n<\/child><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
Example IP of OpnSense : 1.1.1.1 Local IP of OpenSense : 172.40.1.0\/24 Example IP of Forti : 2.2.2.2 Local IP of Forti : 192.168.13.0\/24 Forti Config ( […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-9196","post","type-post","status-publish","format-standard","hentry","category-research"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/9196","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/comments?post=9196"}],"version-history":[{"count":2,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/9196\/revisions"}],"predecessor-version":[{"id":9203,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/9196\/revisions\/9203"}],"wp:attachment":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/media?parent=9196"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/categories?post=9196"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/tags?post=9196"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}