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FortiDor
Explorer II
July 31, 2025
Question

FortiClient SSL VPN - Sticky DNS

Hello,


For a long time, I have been experiencing a problem with a sticky DNS configuration on the FortiClient SSL VPN network card in Windows. I need to have administrative rights to modify the network card and delete the VPN DNS entries in order to access the network on my LAN.


The behavior is not always the same, and the FCT version is 7.2.8

I have already found a knowledge base article on this subject:

https://community.fortinet.com/t5/FortiGate/Technical-Tip-FortiClient-Sticky-DNS/ta-p/279430


I would like to know if anything has changed or if there is anything I can do to fix this issue.


Thank a lot

2 replies

filiaks1
Explorer III
July 31, 2025

Maybe try the latest Fortigate and Forticlient versions and check :

 

EMS Compatibility Chart|FortiClient 7.4.0

 

 

Also have you played with running a script on disconect to clear the DNS ?

 

VPN tunnel and script | FortiClient 7.4.3 | Fortinet Document Library

FortiDor
FortiDorAuthor
Explorer II
July 31, 2025

Thanks for the reply @filiaks1 

 

Need to try the last version but sometimes it works sometimes not.

I am pretty sure that the script on disconnect is only working in an user context
Need to have the admin rights to update the DNS/NIC settings on Windows

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