Heads Up :
The post you are writing will appear in a public forum. Please ensure all content is appropriate for public consumption. Review the employee guidelines for the community here.
Similar issue here using the openconnect VPN client. Appears that DTLS handshake is failing. POST https://[vpn-host]:[vpn-port]/
Got CONNECT response: HTTP/1.1 200 OK
CSTP connected. DPD 30, Keepalive 20
Connected as [provided VPN IP address], using ...