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Question

OS 7.4.12 update broke my IPSec VPN..not happy

Forum|Forum|18 days ago
May 20, 2026
7 replies
503 views

I had automatic updates turned on on my fortigate 60F. After Installation of OS 7.4.12 none of my VPN-Clients were able to login anymore. No idea why. Reverting to 7.4.11 resolved the problem.

Does anyone have an idea what exactly caused the problem? I am not an fortigate expert but that a minor update to the os breaks a basic functionality, at least on my device, doesnt make me happy.

First thing i learned was turning off automatic updates. But thats not a longterm strategy.

IPSEC VPN

funkylicious

SuperUser

without collecting some debug info its hard to say.what caused the issue.

i dont see anything in the release notes about changes or existing/new issue for ipsec

"jack of all trades, master of none"

HarryTran

Staff

Hi Longan,

I would love to investigate this issue, could you please provide the configuration file of your running FW via my official email address thiep@fortinet.com

I will try it on my lab.
It is easier to help you with log/error message collected from users or on the firewall.

Much appreciated your sharing.

Harry.

takarl2

Explorer

it broke my ipsec tunnels

sferoz

Staff

Hi Takarl12,
Could you share more details ?
What kind of tunnel [site to site,dialup VPN and FGT model?]
Is tunnel is up and traffic not passing? or the Tunnel is down?
Is the previous version is 7.4.11 before upgrade to 7.4.12?
Could you share the case no if any and config file,below logs to sferoz@fortinet.com for more review.
Could you collect below :
diagnose debug config-error-log read
Putty1 :
di vpn ike log filter rem-addr4 <'peer IP'>
di de app ike -1
di de cons time en
di de en

Putty-2:

diagnose vpn ike gateway list
diagnose vpn tunnel list
get vpn ipsec tunnel summary
diagnose vpn ipsec status
get vpn ike gateway
get vpn ipsec tunnel details
get vpn ipsec state tunnel
get router info routing-table all
get router info routing-table details X.X.X.X //Specify the destination IP address

Thanks.
Feroz

sjoshi

Staff

What was the forticlient version

Were you able to capture ike debug during the time of issue

Thanks, Salon

msanjaypadma

Staff

Hi @LoganWolfPack ,

It is challenging to accurately identify and diagnose the cause of the issue without relevant debug logs. If you are unsure which logs to collect in the future, please refer to the article below for guidance on how to gather the necessary diagnostic information.

If you have found a solution, please like and mark it as solved to make it easily accessible for everyone.

Thanks,
Mayur Padma

BrokenDown

New Member

It broke site-to-site IPSEC VPNSs as well. I have two 61Fs between my homes and the VPN is down, I am trying to diagnose it.

sferoz

Staff

Hi BrokenDown,
What was the previous firmware before an upgrade?
Could you share the config file, IKE debug logs,sniffer capture if any collected to email “sferoz@fortinet.com” is there is a TAC case no you can attach there and DM me the TAC case no.

Thanks,
Feroz

BrokenDown

New Member

See ticket #11845193. Just created. I uploaded the information.

cjackson_ncl

Explorer II

I’ve just encountered the same issue after upgrading FortiGate from 7.2.13 to 7.4.12. IPsec VPN clients are no longer authenticating. Suspect it is related using remote LDAPS server for user authentication but not confirmed yet.

Any joy with your issue?

cjackson_ncl

Explorer II

Just FYI, in our case we had to import the LDAP Server CA Certificate into the FortiGate certificate store and it resolved the issue.

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