BaseWall, Tel: +31-74-2491004, Fax: +31-74-2593934204 : Advanced WANPort optionsConnection validation• Health Check – Disable will not do Alive Indicator Check. By default health check is enable.Health checking is performing an ICMP echo request and HTTP packets to the specific destinationthat could be either: 1. Name or IP Address user specified in the “Alive Indicator” input box orgateway of WAN interface if “Alive Indicator” input box is left blank.• Alive Indicator – This is the IP address used to check if the WAN connection is operating. TheDual WAN VPN Firewall will contact this system to check if the WAN connection is working.Change this address if you wish. Default is the gateway IP. Note: This is not used for PPPoEconnections.• MTU – The Maximum Transmission Unit is used when determining the packet size to be used onthe WAN interface. Normally, this does not need to be changed, but if your ISP advises you to use aparticular MTU, enter it here.