VPN gateway vendor Aventail introduces short-duration licenses that can be activated during peak periods. The 30- and 90-day licenses are $9.92 per user and $24.79 per user, respectively. The new licensing is unusual in the SSL VPN access space where many products are licensed on a per-device basis. The license is available only on two VPN appliances — the EX-1500, which supports 25 to 50 extra users; and the. EX-2500, supporting 100 to 2,000 extra users.”]
Source: https://www.darkreading.com/analytics/vpn-users-get-spike-protection