After upgrading our FortiGate to v7.4.0 from 6.4.7 (with optional upgrade path 6.4.9 then 6.4.11 ...)
All our IPSEC tunnels are down and phase1 and phase2 are down. At the same time all other config seems to be in place...
We found out that as soon as we choose local gateway "Specify" (our secondary WAN IP) not "Primary IP" the tunnel is down and no communication is happening between our and client FW (all WAN IPs are from one ISPs GW). We can ping clients IP.
Proposals and configuration of P1 and P2 are correct, as I mentioned as soon both sides chooses gateway (our primary IP) tunnel works. Policies are in place, traffic is accesable from both sides when tunnel is up. Routes created.
What could be the possible issues where to look. I tried to find similar issues on forums but no success. Would appreciate any ideas and help.
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