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VPN-SSL error

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Good morning,

Every time our user goes to connect to the VPN to access the server, reaching 98% he disconnects or sometimes he connects and falls, only the second time it works. Is there anything I can check to see why this problem occurs?

FortiGate

spoojaryAnswer

Staff

disable the IPv6 on the NIC of the client machine. Some VPN clients or network configurations may not fully support or handle IPv6 correctly, leading to conflicts or errors in establishing a VPN tunnel.

nradia_FTNT

Staff

Hello,

You can use following articles to troubleshoot:

https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-Possible-reasons-for-FortiClient-SSL-VPN/ta-p/211965

https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-SSL-VPN-Troubleshooting/ta-p/189542

Marcos_FDS1012Author

New Member

I tried all the options and nothing, I got these logs

Debbie_FTNT

Staff & Editor

Hey Marcos,

we have a KB that goes a bit into VPN stuck at 98%:

https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-SSL-VPN-fails-at-98/ta-p/248363

We also have a more generic one:

https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-Possible-reasons-for-FortiClient-SSL-VPN/ta-p/211965

Did you check them already? If yes, did you find any specific error messages?

spoojaryAnswer

Staff

disable the IPv6 on the NIC of the client machine. Some VPN clients or network configurations may not fully support or handle IPv6 correctly, leading to conflicts or errors in establishing a VPN tunnel.

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