SSL connection failure

$ uname -a && cat /etc/redhat-release
Linux falconcrest 2.6.32-696.23.1.el6.x86_64 #1 SMP Tue Mar 13 22:44:18 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
CentOS release 6.9 (Final)

$ sudo openconnect vpn1.vodacom.co.tz
POST https://vpn1.vodacom.co.tz/
Connected to 41.223.5.10:443
SSL negotiation with vpn1.vodacom.co.tz
SSL connection failure
Failed to open HTTPS connection to vpn1.vodacom.co.tz
Failed to obtain WebVPN cookie

Edited May 19, 2019 by Ransford Hewitt