Need your help to sort out the issue related to getting connect to vpn on ubuntu 13.04. I am trying to connect to vpn using below command and getting erros has shown at the end. ~$ sudo openconnect -v myofficevpn.com --certificate=~/my.crt.pem --sslkey=~/my.key.pem Attempting to connect to myofficevpn.com:443 Using certificate file /home/user/my.crt.pem Using private key file /home/user/my.key.pem Using client certificate 'MY' SSL negotiation with myofficevpn.com Server certificate verify failed: signer not found Certificate from VPN server "myofficevpn.com" failed verification. Reason: signer not found Enter 'yes' to accept, 'no' to abort; anything else to view: yes Connected to HTTPS on myofficevpn.com GET https://myofficevpn.com/ Got HTTP response: HTTP/1.0 302 Object Moved Content-Type: text/html; charset=UTF-8 Content-Length: 0 Cache-Control: no-cache Pragma: no-cache Connection: Close Date: Sun, 18 Aug 2013 15:47:09 GMT Location: /+webvpn+/index.html Set-Cookie: tg expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure HTTP body length: (0) SSL negotiation with myofficevpn.com Server certificate verify failed: signer not found Connected to HTTPS on myofficevpn.com GET https://myofficevpn.com/+webvpn+/index.html Got HTTP response: HTTP/1.1 200 OK Transfer-Encoding: chunked Content-Type: text/xml Cache-Control: max-age=0 Set-Cookie: webvpn expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure Set-Cookie: webvpnc expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure Set-Cookie: webvpnlogin=1; secure X-Transcend-Version: 1 HTTP body chunked (-2) Fixed options give Please enter your username and password. Certificate Validation Failure Failed to obtain WebVPN cookie Can somebody help me on this issue? Another thing, if i tried to see the VPN index page on Firefox using my certificate, it works fine and doesn't show the client certificate error. I am using openconnect 4.07 version. Thanks Best Regards, Rishikesh Darandale