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기술 자료

기술 자료: 164017 - 마지막 검토: 1999년 5월 27일 목요일 - 수정: 1.0

이 문서는 이전에 다음 ID로 출판되었음: KR164017

요약

본 문서에서는 DNS(도메인 이름 시스템) 영역 전송을 발생시키는 환경, 영역 전송의 목적 및 작동 방식을 설명합니다.

추가 정보

영역 전송의 정의: 영역 전송은 DNS 영역 파일의 내용을 주 DNS 서버에서 보조 DNS 서버로 복사하는 과정을 나타내는 용어입니다.

영역 전송이 발생하는 상황은 다음과 같습니다.
  • 보조 DNS 서버에서 DNS 서비스를 시작하는 경우.
  • 새로 고침 시간이 만료되는 경우.
  • 변경 내용이 주 영역 파일에 저장되어 있고 Notify List가 존재하는 경우
영역 전송은 항상 보조 DNS 서버에서 시작됩니다. 주 DNS 서버는 영역 전송 요청에 응답만 합니다.

다음의 네트워크 모니터 캡처 시퀀스는 DNS 서비스가 보조 DNS 서버에서 시작되거나 새로 고침 시간이 만료될 때의 과정을 보여줍니다.

프레임 1: 보조 DNS 서버(JH40PS)가 주 DNS 서버(SERVER)에 영역 DOMAIN.COM에 대한 SOA 레코드를 요청합니다. DNS Question Type을 참고하십시오.

JH40PS SERVER DNS 0x4000:Std Qry for domain.com. of type SOA on class INET addr.

DNS: 0x4000:Std Qry for domain.com. of type SOA on class INET addr.
    DNS: Query Identifier = 16384 (0x4000)
    DNS: DNS Flags = Query, OpCode - Std Qry, RCode - No error
        DNS: 0............... = Query
        DNS: 0.0000............... = Standard Query
        DNS: 0............... = Server not authority for domain
        DNS: 0............... = Message complete
        DNS: 0............... = Iterative query desired
        DNS: 0............... = No recursive queries
        DNS: 0.000............... = Reserved
        DNS: ............0000 = No error
    DNS: Question Entry Count = 1 (0x1)
    DNS: Answer Entry Count = 0 (0x0)
    DNS: Name Server Count = 0 (0x0)
    DNS: Additional Records Count = 0 (0x0)
    DNS: Question Section: domain.com. of type SOA on class INET addr.
        DNS: Question Name: domain.com.
        DNS: Question Type = Start of zone of authority
        DNS: Question Class = Internet address class

프레임 2: 주 DNS 서버가 Answer Section에 SOA 레코드의 내용으로 응답합니다.

SERVER JH40PS DNS 0x4000:Std Qry Resp. for domain.com. of type SOA on class INET addr.

DNS: 0x4000:Std Qry Resp. for domain.com. of type SOA on class INET addr.
    DNS: Query Identifier = 16384 (0x4000)
    DNS: DNS Flags = Response, OpCode - Std Qry, AA RA Bits Set, RCode - No
         error
        DNS: 1............... = Response
        DNS: .0000........... = Standard Query
        DNS: .....1.......... = Server authority for domain
        DNS: ......0......... = Message complete
        DNS: .......0........ = Iterative query desired
        DNS: ........1....... = Recursive queries supported by server
        DNS: .........000.... = Reserved
        DNS: ............0000 = No error
    DNS: Question Entry Count = 1 (0x1)
    DNS: Answer Entry Count = 1 (0x1)
    DNS: Name Server Count = 0 (0x0)
    DNS: Additional Records Count = 0 (0x0)
    DNS: Question Section: domain.com. of type SOA on class INET addr.
        DNS: Question Name: domain.com.
        DNS: Question Type = Start of zone of authority
        DNS: Question Class = Internet address class
    DNS: Answer section: domain.com. of type SOA on class INET addr.
        DNS: Resource Name: domain.com.
        DNS: Resource Type = Start of zone of authority
        DNS: Resource Class = Internet address class
        DNS: Time To Live = 86400 (0x15180)
        DNS: Resource Data Length = 41 (0x29)
        DNS: Primary Name Server: server.domain.com.
        DNS: Responsible Authorative Mailbox: administrator.domain.com.
        DNS: Version number = 26 (0x1A)
        DNS: Refresh Interval = 300 (0x12C)
        DNS: Retry interval = 120 (0x78)
        DNS: Expiration Limit = 600 (0x258)
        DNS: Minimum TTL = 86400 (0x15180)

프레임 3: 버전 번호(일련 번호)를 비교한 결과 현재 버전 번호와 다른 것을 발견한 다음 보조 DNS 서버가 영역 전송을 요청합니다. DNS Question Section의 Question Type을 참고하십시오.

JH40PS SERVER DNS 0x0:Std Qry for domain.com. of type Req. for zn Xfer on class INET addr.

DNS: 0x0:Std Qry for domain.com. of type Req. for zn Xfer on class INET addr.
    DNS: TCP Length = 31 (0x1F)
    DNS: Query Identifier = 0 (0x0)
    DNS: DNS Flags = Query, OpCode - Std Qry, RCode - No error
        DNS: 0............... = Query
        DNS: .0000........... = Standard Query
        DNS: .....0.......... = Server not authority for domain
        DNS: ......0......... = Message complete
        DNS: .......0........ = Iterative query desired
        DNS: ........0....... = No recursive queries
        DNS: .........000.... = Reserved
        DNS: ............0000 = No error
    DNS: Question Entry Count = 1 (0x1)
    DNS: Answer Entry Count = 0 (0x0)
    DNS: Name Server Count = 0 (0x0)
    DNS: Additional Records Count = 0 (0x0)
    DNS: Question Section: domain.com. of type Req. for zn Xfer on class
         INET addr.
        DNS: Question Name: domain.com.
        DNS: Question Type = Request for zone transfer
        DNS: Question Class = Internet address class
    DNS: Frame Padding

프레임 4: 주 DNS 서버가 영역 전송에 대한 요청에 응답합니다. 영역 파일의 전체 내용이 DNS Answer Section에 전송됩니다.

SERVER JH40PS DNS 0x0:Std Qry Resp. for domain.com. of type SOA on class INET addr.

DNS: 0x0:Std Qry Resp. for domain.com. of type SOA on class INET addr.
    DNS: TCP Length = 445 (0x1BD)
    DNS: Query Identifier = 0 (0x0)
    DNS: DNS Flags = Response, OpCode - Std Qry, RA Bits Set, RCode - No
         error
        DNS: 1............... = Response
        DNS: .0000........... = Standard Query
        DNS: .....0.......... = Server not authority for domain
        DNS: ......0......... = Message complete
        DNS: .......0........ = Iterative query desired
        DNS: ........1....... = Recursive queries supported by server
        DNS: .........000.... = Reserved
        DNS: ............0000 = No error
    DNS: Question Entry Count = 1 (0x1)
    DNS: Answer Entry Count = 16 (0x10)
    DNS: Name Server Count = 0 (0x0)
    DNS: Additional Records Count = 0 (0x0)
    DNS: Question Section: domain.com. of type Req. for zn Xfer on class
         INET addr.
        DNS: Question Name: domain.com.
        DNS: Question Type = Request for zone transfer
        DNS: Question Class = Internet address class
    DNS: Answer section: . of type SOA on class INET addr.(16 records
         present)
        DNS: Resource Record: domain.com. of type SOA on class INET addr.
            DNS: Resource Name: domain.com.
            DNS: Resource Type = Start of zone of authority
            DNS: Resource Class = Internet address class
            DNS: Time To Live = 86400 (0x15180)
            DNS: Resource Data Length = 41 (0x29)
            DNS: Primary Name Server: server.domain.com.
            DNS: Responsible Authorative Mailbox: administrator.domain.com.
            DNS: Version number = 26 (0x1A)
            DNS: Refresh Interval = 300 (0x12C)
            DNS: Retry interval = 120 (0x78)
            DNS: Expiration Limit = 600 (0x258)
            DNS: Minimum TTL = 86400 (0x15180)
        DNS: Resource Record: domain.com. of type Host Addr on class INET
             addr.
            DNS: Resource Name: domain.com.
            DNS: Resource Type = Host Address
            DNS: Resource Class = Internet address class
            DNS: Time To Live = 86400 (0x15180)
            DNS: Resource Data Length = 4 (0x4)
            DNS: IP address = 130.0.10.150
        DNS: Resource Record: domain.com. of type Auth. NS on class INET
             addr.
            DNS: Resource Name: domain.com.
            DNS: Resource Type = Authoritative Name Server
            DNS: Resource Class = Internet address class
            DNS: Time To Live = 86400 (0x15180)
            DNS: Resource Data Length = 10 (0xA)
            DNS: Authoritative Name Server: server.domain.com.
        DNS: Resource Record: Dell.domain.com. of type Host Addr on class
             INET addr.
            DNS: Resource Name: Dell.domain.com.
            DNS: Resource Type = Host Address
            DNS: Resource Class = Internet address class
            DNS: Time To Live = 86400 (0x15180)
            DNS: Resource Data Length = 4 (0x4)
            DNS: IP address = 130.0.100.30
        DNS: Resource Record: JH40PS.domain.com. of type Host Addr on
                 class INET addr.
            DNS: Resource Name: JH40PS.domain.com.
            DNS: Resource Type = Host Address
            DNS: Resource Class = Internet address class
            DNS: Time To Live = 86400 (0x15180)
            DNS: Resource Data Length = 4 (0x4)
            DNS: IP address = 130.0.10.155

영역 파일이 변경되고 Notify List에 항목이 있는 경우 위에서 예시한 일반 영역 전송 시퀀스 이전에 다음 시퀀스가 발생합니다.

프레임 A: 이 프레임에서 영역 파일이 변경되었습니다. JH40PS는 Notify List에 있기 때문에 주 DNS 서버는 이 프레임을 보내어 보조 DNS 서버에 변경이 발생하였으며 보조 DNS 서버가 SOA 리소스 레코드를 쿼리해야함을 알립니다.

SERVER JH40PS DNS 0x0:Std Qry for domain.com. of type SOA on class INET addr.

DNS: 0x0:Std Qry for domain.com. of type SOA on class INET addr.
    DNS: Query Identifier = 0 (0x0)
    DNS: DNS Flags = Query, OpCode - Rsrvd, AA Bits Set, RCode - No error
        DNS: 0............... = Query
        DNS: .0100........... = Reserved
        DNS: .....1.......... = Server authority for domain
        DNS: ......0......... = Message complete
        DNS: .......0........ = Iterative query desired
        DNS: ........0....... = No recursive queries
        DNS: .........000.... = Reserved
        DNS: ............0000 = No error
    DNS: Question Entry Count = 1 (0x1)
    DNS: Answer Entry Count = 0 (0x0)
    DNS: Name Server Count = 0 (0x0)
    DNS: Additional Records Count = 0 (0x0)
    DNS: Question Section: domain.com. of type SOA on class INET addr.
        DNS: Question Name: domain.com.
        DNS: Question Type = Start of zone of authority
        DNS: Question Class = Internet address class

프레임 B: 보조 DNS 서버가 프레임 A를 받았음을 확인합니다.

JH40PS SERVER DNS 0x0:Std Qry Resp.

DNS: 0x0:Std Qry Resp.
    DNS: Query Identifier = 0 (0x0)
    DNS: DNS Flags = Response, OpCode - Rsrvd, AA Bits Set, RCode - No
         error
        DNS: 1............... = Response
        DNS: .0100........... = Reserved
        DNS: .....1.......... = Server authority for domain
        DNS: ......0......... = Message complete
        DNS: .......0........ = Iterative query desired
        DNS: ........0....... = No recursive queries
        DNS: .........000.... = Reserved
        DNS: ............0000 = No error
    DNS: Question Entry Count = 1 (0x1)
    DNS: Answer Entry Count = 0 (0x0)
    DNS: Name Server Count = 0 (0x0)
    DNS: Additional Records Count = 0 (0x0)
    DNS: Question Section: domain.com. of type SOA on class INET addr.
        DNS: Question Name: domain.com.
        DNS: Question Type = Start of zone of authority
        DNS: Question Class = Internet address class

이 응답 바로 다음에 위의 첫 캡처 시퀀스의 프레임 1과 같이 영역 전송 과정이 시작됩니다.

본 문서의 정보는 다음의 제품에 적용됩니다.
  • Microsoft Windows NT Server 4.0 Standard Edition
키워드: 
kbinfo kbnetwork nttcp KB164017
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