Create OPNsense IPsec site-to-site VPN Tunnel

OPNsense configuration#

• https://docs.opnsense.org/manual/how-tos/ipsec-s2s.html

Protocol ESP
UDP Traffic on port 500 (ISAKMP)
UDP Traffic on port 4500 (NAT-T)

ISP modem#

• IPsec ISAKMP : 500-500
• IPsec NAT-T: 4500-4500

OPNsense firewall rules#

todo

AWS#

todo

Azure#

• https://docs.opnsense.org/manual/how-tos/ipsec-s2s-route-azure.html
• https://rakhesh.com/linux-bsd/setting-up-ipsec-tunnel-from-opnsense-at-home-to-azure
• https://www.youtube.com/watch?v=Y7KwOesXJVY # How to Set Up a Site-to-Site VPN with Azure | Basic VPN Gateway + Ubiquiti

Google Cloud#

todo