The vigor 3900 is a high performance quad gigabit wan firewall for high performance applications the 5 wan ports on the vigor 3900 can provide load balancing wan failover or bandwidth aggregation based on a draytek os platform the vigor 3900 combines high performance and capacity with drayteks traditional ease of use and comprehensive features set for multi tenant or departmental flexibility the vigor 3900 will support multiple lan ip subnets together with vlan capabilities and user m