03-04-2025 09:21 PM
We have upgraded our FW to 11.1.4-h7. After the upgrade the IPSEC tunnels were working fine. But from the past 2 days we are observing that tunnels are flapping and one of the tunnel is down due to phase-1 negotiation failure due to timeout.
Does anyone else facing the same issue? or faced the issue earlier like this?
03-05-2025 03:57 AM
Hi @SudarshanKasat03 ,
Some extra debugging might be required to find the root cause.
I recommend checking out the following Support FAQ that focusses on troubleshooting VPN connectivity issues:
Kind regards,
-Kim.
03-05-2025 07:26 AM
Hello,
While this was a long time ago working with other firewalls. When we saw this type of behavior, we would 'rebuild' the tunnels. Sometimes it was just a matter of changing the pre-shard keys. Sometimes it was to deleted the tunnel config and build new. I dont know if this will solve the issue you are facing, but it could be a bug in the code. In this case if the PSK or rebuild hasn't resolved the issue, I would open a TAC case.
Hope this helps.
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