Linux DNS (2)

*DNS Master, Slave
 1.선수작업 
 : VMware을 통한 Clone DNS 생성
 : Clone DNS IP 변경 (hosts, IP변경툴)
 : 호스트이름 변경
 
 2.Master DNS
 #vi /etc/named.rfc1912.zones
 ----------------------------named.rfc1912.zones---------------------------
 zone "localhost.com" IN {
         type master;  
         file "localhost60.zone";
         also-notify { 172.30.1.1XX; 172.30.1.35; };   <----- 라인 추가
 };
 zone "1.30.172.in-addr.arpa"  IN {
          type master;  
          file "localhost60.rev";
          also-notify { 172.30.1.1XX; 172.30.1.35; };  <----- 라인 추가
 };
 ----------------------------------------------------------------------------------
 실시간으로 자신의 Slave DNS서버에게 변경 사항을 알려주는 설정
 
 #vi /var/named/chroot/var/named/localhost60.zone
 ---------------localhost60.zone--------------------
                 IN NS           ns1
                 IN NS           ns2              <----- 새로운 라인 추가
 ns1             IN A            172.30.1.35
 ns2             IN A            172.30.1.1XX     <----- 새로운 라인 추가
 ----------------------------------------------------------

 #vi localhost60.rev
 ----------------example211.rev--------------------
         IN      NS      ns1.localhost.com.
         IN      NS      ns2.localhost.com.    <----- 새로운 라인 추가
 35     IN      PTR     ns1.localhost.com.
 1XX     IN      PTR     ns2.localhost.com.    <----- 새로운 라인 추가
 --------------------------------------------------
 #service named restart
 #nslookup -q=NS localhost.com

 3.Slave DNS (Clone DNS)
 #vi /etc/named.rfc1912.zones
 -----------------named.rfc1912.zones----------------
 zone "localhost.com" IN {
         type slave;                    
         masters { 172.30.1.35; };    
         file "slaves/localhost60.zone";
 };
 zone "1.30.172.in-addr.arpa" IN {
         type slave;                   
         masters { 172.30.1.35; };  
         file "slaves/localhost60.rev";  
 };
 -----------------------------------------------------
 #service network restart
 #ls -l /var/named/chroot/var/named/slaves
 
*Master, Slave DNS 존 업데이트
 SOA(Start Of Authority)
 ? Serial Number  (권장: 2010031100)
 ? Refresh Time        (권장: 12H, 1D)
 ? Retry Time          (권장: 15M ~ 1H)
 ? Expire Date         (권장: 1W)
 ? TTL, Time To Live   (권장: 1D)
 (Master DNS)
 #vi /var/named/chroot/var/named/localhost60.zone
 ------------localhost60.zone-------------
 test IN A 172.30.1.35
 ----------------------------------------
 #service named restart
 
 (Slave DNS)
 #cat /var/named/chroot/var/named/slaves/localhost60.zone
 test가 업데이트가 안되어 짐
 ※이유 : 존 업데이트시 Serial Num을 비교하여 업데이트 하기 때문
 (Master DNS)
 #vi /var/named/chroot/var/named/localhost60.zone
 Serial Number의 숫자↑
 #service named restart
 (Slave DNS)
 #cat /var/named/chroot/var/named/slaves/localhost60.zone
 확인