We have a client with 6 sites using IPsec. Every now and again, possibly once a week, sometimes once a month, data just stops flowing from the remote Fortigate VPN server to the local MikroTik IPsec VPN client.
In order to demonstrate the symptoms of the problem I have attached a diagram.
I would like to connect Mac OS X (Lion) with Windows Server 2008 (R2) using IPSec natively. Simplest possible settings: No certificates, no tools, no specials. Just a Windows Server with IPSec "Pre-Shared Key" Authentication. Looks like an easy job, but after weeks of research I still have no success.
Attached there's a screenshot of the Windows settings.
I'm trying to setup a strongSwan server in my home and connect to it from another network. Let's say sun is the VPN server and venus is the client. Both sun and venus are behind NAT networks. sun is not the gateway of my home networks.