708N0008589 3.3Using the Business Communications Manager DNS serviceConsider the following guidelines when using DNS:• If you enable the Business Communications Manager DNS service, ensure that you configureeach workstation on the network to use Business Communications Manager as DNS server.• When you disable Business Communications Manager DNS service, set the DNS Server fieldin DHCP configuration to the remote DNS server IP address. If DHCP service is also disabledin Business Communications Manager, you must configure each workstation on your networkto use the remote DNS server.To configure DNS services settings1 On the navigation tree, click the Services key and click the DNS heading.The DNS Summary screen appears.2 Configure the DNS Summary attributes according to the following table.3 Press the Tab key to save the settings.Table 199 DNS Summary attributesAttribute DescriptionDescription Allows you to view the description of the DNS server.Version Allows you to view the version of the DNS service.Status Allows you to enable or disable the DNS cache proxy in Business Communications Manager.IP Domain Allows you to specify the domain name that Business Communications Manager and its DHCPclients uses. When you modify the Domain, the setting automatically copies to Domain Nameglobal options under DHCP service.Primary (andSecondary)ServerAllows you to specify the IP addresses of the primary DNS server and the secondary DNS serverin a valid dot format. When you specify a secondary DNS server, separate the two IP addressesby a space.The DNS cache uses the servers in the order that you specify, so make sure the IP address of thesecondary DNS server appears second.Forward Timeout Allows you to specify the time-out, in seconds, to resolve queries using the DNS servers that youspecify in DNS server.Note: The DNS proxy carries security features because it keeps all of the internal IPaddresses from external web servers. For information on other security features, see“Configuring NAT (Network Address Translation)” on page 737 and “Configuring IPFirewall Filters” on page 819.
