Network Administration for the Solaris 9 Operating Environment SA-399 Student Guide phần 7

TTL chỉ thị xác định giá trị bộ nhớ cache TTL rằng từ xa các máy chủ DNS nhận được khi họ truy vấn các thông tin theo quy định của Chỉ thị này. Tuyên bố này chỉ thị, hoặc kiểm soát, không có sẵn để sử dụng cho đến khi phiên bản BIND . | Introducing DNS Basics PTR resource record type IN PTR . CNAME resource record type . IN CNAME . The TTL directive identifies the cache TTL value that remote DNS servers receive when they query the information specified by this directive. This directive or control statement was not available for use until BIND versions. Configuring DNS Copyright 2002 Sun Microsystems Inc. All Rights Reserved. Enterprise Services Revision A 10-13 Configuring the DNS Server Configuring the DNS Server The DNS name server is called the process. The process is started at boot time only if the etc file exists. Gathering Information When you configure a DNS server supply the server with the following types of information The names and addresses of root servers. The information required to resolve all domains for which the server is authoritative. This information consists of name-to-address translations. The information needed to resolve all reverse domains for which the server is authoritative. This information consists of address-to-name translations. The names and addresses of servers for all domains that are one level below the domains being served by this server. This information is sometimes referred to as parenting or delegating. Editing the BIND Configuration File BIND version and later versions use a new configuration file etc that replaced the etc file. A BIND version file can be converted to a file by running the usr sbin named-bootconf script. The etc file contains statements that Indicate the location of the file that includes the root servers Establish the server as a primary a secondary or a cache-only server Specify the server s zones of authority Indicate the location of the server s data files Selectively apply security for specific zones Define logging specifications Selectively apply options for a set of zones 10-14 .