[Linux] 캐싱 DNS Server 구축

#캐시 네임 서버
- 사용자들의 질의를 받아  DNS 정보를 조회하여 응답해주는 네임서버
> 캐시 DNS 서버 구축
1. 서비스에 필요한 패키지 찾기
-bind, bind-utils
2. 패키지 버전 확인
3. 패키지 설치
[root@localhost name]# yum install -y bind bind-utils

4. 설정 및 확인(시작을 해야 가능한 경우도 존재함)

[root@localhost name]#vi /etc/named.conf

5. 서비스 시작(#systemctl  restart)

[root@localhost name]#systemctl restart named

6. 서비스 확인(#systemctl status)

[root@localhost name]#systemctl status named

 

7. 방화벽 설정

[root@localhost name]#firewall-cmd --add-port={53/udp,53/tcp}

[root@localhost name]#firewall-cmd --add-port={53/udp,53/tcp} --permanent

8. 방화벽 설정 확인

[root@localhost name]#firewall-cmd --list-all

9. 포트 상태 확인

[root@localhost name]# netstat -nltp | grep

 

연습 dns가 ip를 받아오는 과정

[root@localhost name]#dig @192.168.56.10 www.busan.go.kr  A +trace