![]() ![]() The firmware of both appliances tested in this setup:īesides this drawing, we need to agree on certain parameters. We can even route it not only to the interface but also to the IP inside the tunnel on the other side. This allows us to route traffic destined for the VPN tunnel to this interface. Each has a private network attached and on both sides, we have a numbered tunnel interface. Both units receive a public IP via DHCP from my ISP. To get this going, I built a little demo set up here to test this out. The requirement for this setup was to have a route-based IPSEC VPN. A lot of these larger networks use routing protocols to announce to their neighbors their internal networks. In large networks, this is not very flexible. ![]() ![]() If you later want to change it you need to configure both sides again. Using a policy-based setup, the networks on both sides are defined statically in the configuration and during the negotiation of the IPSEC VPN tunnel. In the blue corner the challenger of today Barracuda CloudGen Firewall and in the red corner Fortinet’s FortiGate Next-Gen Firewall.Ī year or 2 ago, I already had worked on this and I had a configuration documented but that never got onto the blog. Recently, I worked on a project to connect 2 firewalls, I know quite well, using IPSEC. Connection vendor A with vendor B or with open source implementation C can be a daunting task and some say: “it is black magic”. This leads to the implementations of the standard to be ever so slightly out of sync with each other. It is a standard developed in a large committee to create something that was versatile but it made it also quite complex. ‘IPSEC’ is not the most user-friendly protocol in the world. They will think about the numerous times trying to get tunnel up or debugging a stability issue with one of the tunnels. At the same time, if you mention the word ‘IPSEC’ to a lot if not most IT Pro’s they will cringe. ![]() To connect different locations with each other the word ‘IPSEC’ comes up very quickly. ![]()
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