Configuration
Use Windows DNS servers
When this option is selected, SecurityGateway will use all DNS servers found within your Windows TCP/IP configuration. It will try each DNS server once per lookup operation and in sequence until it exhausts the complete list of DNS servers or finds the first one that works.
Use manually configured DNS servers
Use this option if you wish to designate specific DNS servers for SecurityGateway to use. It will use all DNS servers specified here in the order listed when performing DNS lookups. It will try each server once per lookup operation and in sequence until it exhausts the complete list of DNS servers or finds the first one that works.