I have had many site-to-site IPsec tunnels working fine for several years until I upgraded to FortiOS 7.4.2. Shortly afterward, my tunnels began dropping connections on random Phase 2 connections. I have had to bring down the phases or entire tunnel to get traffic flowing again many times. I opened a ticket with Fortinet and had three technicians working with me at various times but none found a solution.
I finally downgraded to 7.4.1 and all my problems went away. There is obviously a bug in 7.4.2 and I hope Fortinet finds and acknowledges it and fixes it for the next release.
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Update 7.6.0 is available, has anyone updated it yet? In the documentation they reported that they resolved the bug.
1003830 | IPsec VPN tunnel phase 2 instability after upgrading to 7.4.2 on the NP6xlite platform. |
Cluster update to 7.6.0 last week - since then short interruption for all services (HTTP, SMTP, SSH,...) behind simple firewall rules. After reboot of one device - ha out of sync with problems in read only profiles.
Support Ticket note: 7.6 is a point zero release, which we do not recommend for production environments. I suggest considering a rollback to the previously working version.
After downgrade to 7.4.4 everything went back to "normal" - with the known issues :(
From my point of view 7.6.0 is unusable.
Please try the latest 7.2.9GA and 7.4.4GA which should include this fix, bug id #950445, 7.0.16GA will include this bug in the next release, currently, 7.0.15GA still has the problem.
Thanks
Kangming
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