I found a new solution that has just come out and tested / works as expected. No need for desktop policy / policy server or higher end VPN remote access product.
There is a new feature within the trac_client_1.ttm and supported on E84.50+ client ( easy to automatic upgrade ). This feature doesn't require the policy server desktop firewall.
We tested this and it works.
ref sk75221 ( attribute is on SK )
allow_ipv6 / string / Blocks or allows IPv6 traffic to the client / true / false / client_decide / false E80.50