NAME

        SV_RFC1123_6_1_3_2_query_while_zone_trans - Processing UDP query while zone transferring

VERIFICATION POINTS

        Verify that a NUT continues to process UDP query while zone transferring.

A DNS server MUST have sufficient internal concurrency that

it can continue to process UDP queries while awaiting a

response or performing a zone transfer on an open TCP

connection

TARGET

        Server (Secondary)

SYNOPSIS

	SV_RFC1123_6_1_3_2_query_while_zone_trans.seq [-tooloption ...]: KOI tool option
	See also DNSConfig.pm

INITIALIZATION

Network Topology

Net-y   -----------+--------------------------------------------- 3ffe:501:ffff:101::/64
                   |                                              192.168.1/24
                   |
                   |                     sec.example.com domain
                 Router (TN)             DNS Server7
                   |3ffe:501:ffff:100::1   |3ffe:501:ffff:100::31
                   |192.168.0.1            |192.168.0.31
                   |                       |
                   |                       |
Net-z   --+--------+-----------------+-----+------------------+-- 3ffe:501:ffff:100::/64
          |                          |                        |    192.168.0/24
          |                          |                        |
        DNS Server1 (NUT)          DNS Client1 (TN)         DNS Client2 (TN)
           3ffe:501:ffff:100::XXXX    3ffe:501:ffff:100::20    3ffe:501:ffff:100::21
           192.168.0.10               192.168.0.20             192.168.0.21,22
	

	XXXX: EUI64

Setup

Set the DNS Server1's (NUT) address as above mentioned Network Topology.

Configure the Server1's: (NUT)

zone file to response query from TN.

configuration file as secondary server about sec.example.com zone.

disable notify function.

Example of root server list:

For IPv4:

.                       3600000         IN      NS      A.ROOT.NET.
A.ROOT.NET.             3600000                 A       192.168.1.20

For IPv6:

.                       3600000         IN      NS      A.ROOT.NET.
A.ROOT.NET.             3600000                 AAAA    3ffe:501:ffff:101::20

Example of example.com zone file:

$TTL    86400           ; TTL of 1 day
@ IN SOA NS1.example.com. root.example.com. (
	2005081600	; serial
	3600		; refresh every 1 hr
	900		; retry every 15 min
	604800		; expire after a week
	3600		; Minimum TTL of a 1 hr
)
;
	IN	NS	NS1.example.com.
NS1	IN	A	192.168.0.10
;
A	IN	A	192.168.1.10

Example of DNS server configuration for secondary:

zone "sec.example.com" {
	type slave;
	masters {192.168.0.31;};
	file "s/sec.example.com";
};

TEST PROCEDURE

        This test sequence is following.

    DNS Client1 (TN)             DNS Server1 (NUT)              DNS Server7 (TN)
        |                              |                              |
        |                              |                              |
        |                              |----------------------------->|
        |                              | 1. Standard query            |
        |                              |  QNAME = sec.example.com     |
        |                              |  QTYPE = SOA (0x0006)        |
        |                              |                              |
        |                              |<-----------------------------|
        |                              | 2. Standard query response   |
        |                              |  QNAME = sec.example.com     |
        |                              |  QTYPE = SOA (0x0006)        |
        |                              |  ANSWER Name                 |
        |                              |       = sec.example.com      |
        |                              |  ANSWER Type                 |
        |                              |       = SOA (0x0006)         |
        |                              |  ANSWER TTL                  |
        |                              |       = 300                  |
        |                              |  ANSWER MNAME                |
        |                              |       = NS7.sec.example.com  |
        |                              |  ANSWER Rname                |
        |                              |       = root.sec.example.com |
        |                              |  ANSWER SERIAL               |
        |                              |       = 1                    |
        |                              |  ANSWER REFRESH              |
        |                              |       = 300sec               |
        |                              |  ANSWER RETRY                |
        |                              |       = 30sec                |
        |                              |  ANSWER EXPIRE               |
        |                              |       = 600sec               |
        |                              |  ANSWER MINIMUM              |
        |                              |       = 300sec               |
        |                              |  AUTHORITY Name              |
        |                              |       = sec.example.com      |
        |                              |  AUTHORITY Type              |
        |                              |       = NS (0x0002)          |
        |                              |  AUTHORITY Name Server       |
        |                              |       = NS7.sec.example.com  |
        |                              |  ADDITIONAL Name             |
        |                              |       = NS7.sec.example.com  |
        |                              |  ADDITIONAL Type             |
        |                              |       = A (0x0001)           |
        |                              |  ADDITIONAL Address          |
        |                              |       = 192.168.0.31         |
        |                              |                              |
        |                              |----------------------------->|
        |                              | 3. Standard query (using TCP)|
        |                              |  QNAME = sec.example.com     |
        |                              |  QTYPE = AXFR (0x00FC)       |
        |                              |                              |
        |----------------------------->|                              |
        | 4. Send standard query       |                              |
        |  QNAME = A.example.com       |                              |
        |  QTYPE = A                   |                              |
        |                              |                              |
        |<-----------------------------|                              |
        | 5. Standard query response   |                              |
        |  QNAME = A.example.com       |                              |
        |  QTYPE = A                   |                              |
        |  ANSWER Name                 |                              |
        |        = A.example.com       |                              |
        |  ANSWER Type                 |                              |
        |        = A (0x0001)          |                              |
        |  ANSWER Address              |                              |
        |        = 192.168.1.10        |                              |
        |                              |                              |
        |  AUTHORITY Name              |                              |
        |        = example.com         |                              |
        |  AUTHORITY Type              |                              |
        |        = NS (0x0002)         |                              |
        |  AUTHORITY Name Server       |                              |
        |        = NS1.example.com     |                              |
        |                              |                              |
        |  ADDITIONAL Name             |                              |
        |        = NS1.example.com     |                              |
        |  ADDITIONAL Type             |                              |
        |        = A (0x0001)          |                              |
        |  ADDITIONAL Address          |                              |
        |        = 192.168.0.10        |                              |
        |                              |                              |
        v                              v                              v

        This test sequence is following.

        1. DNS Server1 (NUT) transmits standard query QNAME = sec.example.com, 
           QTYPE = SOA to DNS Server7 (TN). (Judgment *1)
        2. DNS Server7 (TN) sends standard query response with SOA RRs to DNS Server1 (NUT).

        3. DNS Server1 (NUT) transmits standard query with QNAME = sec.example.com,
           QTYPE = AXFR using TCP to DNS Server7 (TN). (Judgment *3)

        4. DNS Client1 (TN) sends standard query QNAME = A.example.com QTYPE=A to DNS Server1 (NUT).
        5. DNS Server1 (NUT) transmits standard query response ANSWER Address = 192.168.1.10 
           to DNS Client1 (TN). (Judgment *5)

Packet Description

1st packet.

Standard query from DNS Server1 (NUT) to Server7 (TN)
IP Header	Source Address	NUT_NETZ
IP Header	Destination Address	SV7_NETZ
UDP Header	Src Port	ANY
UDP Header	Dst Port	53
DNS Header	ID	ANY
	QR	0
	OPCODE	0
	AA	0
	TC	0
	RD	0
	RA	0
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	0
	ARCOUNT	0
DNS Question section	QNAME	sec.example.com
	QTYPE	SOA (0x0006)
	QCLASS	IN (0x0001)

2nd packet.

Standard query response from DNS Server7 (TN) to Server1 (NUT)
IP Header	Source Address	SV7_NETZ
IP Header	Destination Address	NUT_NETZ
UDP Header	Src Port	53
UDP Header	Dst Port	Value that NUT uses
DNS Header	ID	Value that NUT uses
	QR	1
	OPCODE	0
	AA	1
	TC	0
	RD	0
	RA	0
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	1
	NSCOUNT	1
	ARCOUNT	2
DNS Question section	QNAME	sec.example.com
	QTYPE	SOA (0x0006)
	QCLASS	IN (0x0001)
DNS Answer section	NAME	sec.example.com (Pointer 0xC00C)
	TYPE	SOA (0x0006)
	CLASS	IN (0x0001)
	TTL	300sec
	RDLENGTH	33
	MNAME	NS7.sec.example.com (NS7 + Pointer 0xC00C)
	RNAME	root.sec.example.com (root + Pointer 0xC00C)
	SERIAL	1
	REFRESH	300sec
	RETRY	30sec
	EXPIRE	600sec
	MINIMUM	300sec
DNS Authority section	NAME	sec.example.com (Pointer 0xC00C)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	300sec
	RDLENGTH	2
	NSDNAME	NS7.sec.example.com (Pointer 0xC02D)
DNS Additional section	NAME	NS7.sec.example.com (Pointer 0xC02D)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	300sec
	RDLENGTH	4
	ADDRESS	192.168.0.31
DNS Additional section	NAME	NS7.sec.example.com (Pointer 0xC02D)
	TYPE	AAAA (0x001C)
	CLASS	IN (0x0001)
	TTL	300sec
	RDLENGTH	16
	ADDRESS	3ffe:501:ffff:100::31

3rd packet.

Standard query from DNS Server1 (NUT) to Server7 (TN)
IP Header	Source Address	NUT_NETZ
IP Header	Destination Address	SV7_NETZ
TCP Header	Src Port	ANY
TCP Header	Dst Port	53
DNS Header	ID	ANY
	QR	0
	OPCODE	0
	AA	0
	TC	0
	RD	0
	RA	0
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	0
	ARCOUNT	0
DNS Question section	QNAME	sec.example.com
	QTYPE	AXFR (0x00FC)
	QCLASS	IN (0x0001)

4th packet.

Standard query from DNS Client1 (TN) to Server1 (NUT)
IP Header	Source Address	CL1_NETZ
IP Header	Destination Address	NUT_NETZ
UDP Header	Src Port	2000
UDP Header	Dst Port	53
DNS Header	ID	0x1000
	QR	0
	OPCODE	0
	AA	0
	TC	0
	RD	1
	RA	0
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	0
	ARCOUNT	0
DNS Question section	QNAME	A.example.com
	QTYPE	A (0x0001)
	QCLASS	IN (0x0001)

5th packet.

Standard query response from DNS Server1 (NUT) to Client1 (TN)
IP Header	Source Address	NUT_NETZ
IP Header	Destination Address	CL1_NETZ
UDP Header	Src Port	53
UDP Header	Dst Port	2000
DNS Header	ID	0x1000
	QR	1
	OPCODE	0
	AA	ANY
	TC	0
	RD	1
	RA	ANY
	Z	ANY
	RCODE	0
	QDCOUNT	1
	ANCOUNT	1
	NSCOUNT	1
	ARCOUNT	1
DNS Question section	QNAME	A.example.com
	QTYPE	A (0x0001)
	QCLASS	IN (0x0001)
DNS Answer section	NAME	A.example.com (Pointer 0xC00C)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	ADDRESS	192.168.1.10
DNS Authority section	NAME	example.com (Pointer 0xC00E)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	6
	NSDNAME	NS1.example.com (NS1 + Pointer 0xC00E)
DNS Additional section	NAME	NS1.example.com (Pointer 0xC03B)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	ADDRESS	192.168.0.10

Exp.

NUT_NETZ	DNS Server1's (NUT) Net-z address
CL1_NETZ	DNS Client1's (TN) Net-z address
SV7_NETZ	DNS Server7's (TN) Net-z address

JUDGMENT

        1. Received standard query with Type=SOA. 
        3. Received standard query with Type=AXFR using TCP
        5. Received standard query response including Answer address 192.168.1.10.

TERMINATION

        None

REFERENCE

        RFC1123 Requirements for Internet Hosts -- Application and Support
        6.1.3.2  Transport Protocols