Does anybody know how to restrict the IPs that are virtual IPs? when users try to login througth horison wm ware, for example...
An IP is an IP, virtual or not. Do you mean a public or private IP ?
IMHO the best option is to not make your server publicly accessible and only allow access from vpn or trusted local connections.
E.g my users on my networks can only connect via router based ipsec in the offices, or with openvpn if off site.
My 10c for a quieter life.....