I don't know the answer.   My gut reaction (because this is what I would do as I prefer the path of least pain) is to suggest buying some Cisco AnyConnect licences and using that.  Linux is a first-class supported platform for AnyConnect, and is more likely to work. https://documentation.meraki.com/MX/Client_VPN/AnyConnect_on_the_MX_Appliance    Otherwise - the below error is the key bit to focus on.  It means you are not accepting any of the security transforms presented by the Meraki MX.  The default security transforms presented are quite weak, but Meraki has to use those otherwise, Windows won't connect.  I'm guessing Ubuntu 22 has disabled these weaker transform sets.     received NO_PROPOSAL_CHOSEN error notify     I'm not sure what the exact cipher presented to client VPN is by default.  My guess is: AES128-CBC+SHA1+DH Group 2   In StrongSwan it is likely to be something like (untested): ike=aes128-sha1-modp1024 esp=aes128-sha1-modp1024   If you don't have Windows users, you can ask Meraki support to change this to (for client VPN): AES128-CBC+SHA1+DH Group 14 Which is more likely to work.   ... View more