Penjelasan tentang DNS Zone Transfer

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RINGKASAN

Artikel ini membahas keadaan yang dapat memicu Nama Domain Sistem (DNS) Zona Transfer, tujuan dari zona transfer, dan bagaimana proses bekerja.

INFORMASI LEBIH LANJUT

Definisi Zona Transfer: A Zona Transfer adalah istilah yang digunakan untuk merujuk kepada proses yang isi file DNS Zone disalin dari utama server DNS ke server DNS sekunder.

Zona transfer akan terjadi selama salah satu skenario berikut:
  • Ketika memulai layanan DNS server DNS sekunder.
  • Ketika waktu refresh berakhir.
  • Ketika perubahan disimpan ke file zona utama dan ada beritahu Daftar.
Zona Transfer selalu dimulai oleh server DNS sekunder. The server DNS utama hanya menjawab permintaan untuk Zona Transfer.

Jaringan Monitor menangkap urutan berikut menunjukkan proses ketika salah satu layanan DNS dimulai pada server DNS sekunder atau refresh waktu berakhir:

Bingkai 1: Permintaan server DNS sekunder - JH40PS - SOA catatan dari server DNS utama - SERVER - untuk pertanyaan DNS Zone DOMAIN.COM. catatan Jenis.

JH40PS SERVER DNS 0x4000:Std Qry untuk domain.com. jenis SOA di kelas INET addr.

DNS: 0x4000:Std Qry untuk domain.com. jenis SOA pada kelas INET addr.
    DNS: Query Identifier = 16384 (0x4000)
    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 SOA on class INET addr.
        DNS: Question Name: domain.com.
        DNS: Question Type = Start of zone of authority
        DNS: Question Class = Internet address class
				

Bingkai 2: Server DNS utama menanggapi dengan isi SOA merekam di bagian jawaban.

SERVER JH40PS DNS 0x4000:Std Qry Resp. untuk domain.com. dari jenis SOA pada kelas INET addr.

DNS: 0x4000:Std Qry Resp. untuk domain.com. jenis SOA pada kelas 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)
				

Bingkai 3: Memiliki dibandingkan nomor versi (nomor seri) dan menemukan itu berbeda dari nomor versi saat ini, server DNS sekunder yang sekarang permintaan Transfer zona. Catatan jenis pertanyaan di pertanyaan DNS Bagian.

JH40PS SERVER DNS 0x0:Std Qry untuk domain.com. jenis Req. untuk zn Xfer pada kelas INET addr.

DNS: 0x0:Std Qry untuk domain.com. jenis Req. untuk zn Xfer pada kelas 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
				

Bingkai 4: Server DNS utama sesuai dengan permintaan untuk sebuah zona Transfer. Seluruh isi berkas zona ditransfer DNS Bagian jawaban.

SERVER JH40PS DNS 0x0:Std Qry Resp. untuk domain.com. dari jenis SOA pada kelas INET addr.

DNS: 0x0:Std Qry Resp. untuk domain.com. jenis SOA pada kelas 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 = 130.0.10.30
        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
				

Jika perubahan yang dibuat untuk zona file dan ada entri di beritahu Daftar, urutan berikut akan terjadi sebelum biasa Zona Transfer urutan seperti diuraikan di atas.

Bingkai A: dalam kerangka ini, perubahan telah dibuat untuk zona file. Karena JH40PS adalah pada daftar memberitahu, server DNS utama mengirimkan kerangka ini untuk memberitahu server DNS sekunder yang perubahan telah terjadi dan bahwa server DNS sekunder harus query SOA catatan sumber daya.

SERVER JH40PS DNS 0x0:Std Qry untuk domain.com. jenis SOA di kelas INET addr.

DNS: 0x0:Std Qry untuk domain.com. jenis SOA pada kelas 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
				

Bingkai B: server DNS sekunder mengakui penerimaan Frame 1.

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
				

Segera setelah respons ini, proses Zona Transfer dimulai di Bingkai 1 dalam urutan menangkap pertama di atas.

Properti

ID Artikel: 164017 - Kajian Terakhir: 15 September 2011 - Revisi: 2.0
Berlaku bagi:
  • Microsoft Windows NT Server 4.0 Standard Edition
Kata kunci: 
kbinfo kbnetwork kbmt KB164017 KbMtid
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