SV_RFC1034_3_6_MX_rdata - Resource record of MX
Verify that a NUT transmits correct message including MX resource record.
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | PREFERENCE | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ / EXCHANGE / / / +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
PREFERENCE : |
A 16 bit integer which specifies the preference given to this RR among others at the same owner. Lower values are preferred. |
EXCHANGE : | A <domain-name> which specifies a host willing to act as a mail exchange for the owner name. |
Authoritative Server
SV_RFC1034_3_6_MX_rdata.seq [-tooloption ...]: KOI tool option See also DNSConfig.pm
AP Server1 (TN) |3ffe:501:ffff:101::10 |192.168.1.10 | Net-y --+--------+-------------------------- 3ffe:501:ffff:101::/64 | 192.168.1/24 | | Router (TN) |3ffe:501:ffff:100::1 |192.168.0.1 | | Net-z --+--------+-----------------+-------- 3ffe:501:ffff:100::/64 | | 192.168.0/24 | | DNS Server1 (NUT) DNS Client1 (TN) 3ffe:501:ffff:100::XXXX 3ffe:501:ffff:100::20 192.168.0.10 192.168.0.20
XXXX: EUI64
$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. IN MX 10 MAIL1 ; NS1 IN A 192.168.0.10 MAIL1 IN A 192.168.1.11
$TTL 86400 ; TTL of 1 day @ IN SOA NS1.example.com. root.example.com. ( 2005081601 ; 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. IN MX 10 MAIL1 IN MX 20 MAIL2 ; NS1 IN A 192.168.0.10 MAIL1 IN A 192.168.1.11 MAIL2 IN A 192.168.1.12
This test sequence is following.
DNS Client1 (TN) DNS Server1 (NUT) | | |------------------------------------->| | 1. Send standard query | | QNAME=example.com | | QTYPE=MX | | | |<-------------------------------------| | 2. Standard query response | | MX=10 MAIL1.example.com | | | |(Change zone file on DNS Server1(NUT) | | from A to B.) | | | |------------------------------------->| | 3. Send standard query to NUT | | QNAME=example.com | | QTYPE=MX | | | |<-------------------------------------| | 4. Standard query response | | MX=10 MAIL1.example.com | | MX=20 MAIL2.example.com | | | v v
1. TN send standard query QNAME=example.com, QTYPE=MX to NUT. 2. NUT reply query response w/ MX=10 MAIL1.example.com to TN (Judgment *2) 3. TN send standard query QNAME=mail.example.com, QTYPE=MX to NUT. 4. NUT reply query response w/ MX=10 MAIL1.example.com and MX=20 MAIL2.example.com to TN (Judgment *4)
|
||
IP Header | Source Address | CL1_NETZ |
Destination Address | NUT_NETZ | |
UDP Header | Src Port | 2000 |
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 | example.com |
QTYPE | MX (0x000F) | |
QCLASS | IN (0x0001) |
|
||
IP Header | Source Address | NUT_NETZ |
Destination Address | CL1_NETZ | |
UDP Header | Src Port | 53 |
Dst Port | 2000 | |
DNS Header | ID | 0x1000 |
QR | 1 | |
OPCODE | 0 | |
AA | 1 | |
TC | 0 | |
RD | 1 | |
RA | ANY | |
Z | 0 | |
RCODE | 0 | |
QDCOUNT | 1 | |
ANCOUNT | 1 | |
NSCOUNT | 1 | |
ARCOUNT | 2 | |
DNS Question section | QNAME | example.com |
QTYPE | MX (0x000F) | |
QCLASS | IN (0x0001) | |
DNS Answer section | NAME | example.com (Pointer 0xC00C) |
TYPE | MX (0x000F) | |
CLASS | IN (0x0001) | |
TTL | 1 day (86400) | |
RDLENGTH | 10 | |
PREFERENCE | 10 | |
EXCHANGE | MAIL1.example.com (MAIL1 + Pointer 0xC00C) | |
DNS Authority section | NAME | example.com (Pointer 0xC00C) |
TYPE | NS (0x0002) | |
CLASS | IN (0x0001) | |
TTL | 1 day (86400) | |
RDLENGTH | 6 | |
NSDNAME | NS1.example.com (NS1 + Pointer 0xC00C) | |
DNS Additional section | NAME | MAIL1.example.com (Pointer 0xC02B) |
TYPE |
A (0x0001) | |
CLASS | IN (0x0001) | |
TTL | 1 day (86400) | |
RDLENGTH | 4 | |
ADDRESS | 192.168.1.11 | |
DNS Additional section | NAME | NS1.example.com (Pointer 0xC03F) |
TYPE |
A (0x0001) | |
CLASS | IN (0x0001) | |
TTL | 1 day (86400) | |
RDLENGTH | 4 | |
ADDRESS | 192.168.0.10 |
|
||
IP Header | Source Address | CL1_NETZ |
Destination Address | NUT_NETZ | |
UDP Header | Src Port | 2001 |
Dst Port | 53 | |
DNS Header | ID | 0x1001 |
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 | example.com |
QTYPE | MX (0x000F) | |
QCLASS | IN (0x0001) |
|
||
IP Header | Source Address | NUT_NETZ |
Destination Address | CL1_NETZ | |
UDP Header | Src Port | 53 |
Dst Port | 2001 | |
DNS Header | ID | 0x1001 |
QR | 1 | |
OPCODE | 0 | |
AA | ANY | |
TC | 0 | |
RD | 1 | |
RA | ANY | |
Z | 0 | |
RCODE | 0 | |
QDCOUNT | 1 | |
ANCOUNT | 2 | |
NSCOUNT | 1 | |
ARCOUNT | 3 | |
DNS Question section | QNAME | example.com |
QTYPE | MX (0x000F) | |
QCLASS | IN (0x0001) | |
DNS Answer section 1 | NAME | example.com (Pointer 0xC00C) |
TYPE | MX (0x0001) | |
CLASS | IN (0x0001) | |
TTL | 1 day (86400) | |
RDLENGTH | 10 | |
PREFERENCE | 10 | |
EXCHANGE | MAIL1.example.com (MAIL1 + Pointer 0xC00C) | |
DNS Answer section 2 | NAME | example.com (Pointer 0xC00C) |
TYPE | MX (0x000F) | |
CLASS | IN (0x0001) | |
TTL | 1 day (86400) | |
RDLENGTH | 10 | |
PREFERENCE | 20 | |
EXCHANGE | MAIL2.example.com (MAIL1 + Pointer 0xC00C) | |
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 0xC00C) | |
Additional section 1 | NAME | MAIL1.example.com (Pointer 0xC02B) |
TYPE |
A (0x0001) | |
CLASS | IN (0x0001) | |
TTL | 1 day (86400) | |
RDLENGTH | 4 | |
ADDRESS | 192.168.1.11 | |
Additional section 2 | NAME | MAIL2.example.com (Pointer 0xC041) |
TYPE |
A (0x0001) | |
CLASS | IN (0x0001) | |
TTL | 1 day (86400) | |
RDLENGTH | 4 | |
ADDRESS | 192.168.1.12 | |
DNS Additional section | NAME | NS1.example.com (Pointer 0xC055) |
TYPE |
A (0x0001) | |
CLASS | IN (0x0001) | |
TTL | 1 day (86400) | |
RDLENGTH | 4 | |
ADDRESS | 192.168.0.10 |
NUT_NETZ | DNS Server1's (NUT) Net-z address |
CL1_NETZ | DNS Client1's (TN) Net-z address |
2. Received standard query response including MX type record. 4. Received standard query response including multiple MX type records.
None
RFC1034 DOMAIN NAMES - CONCEPTS AND FACILITIES 3.6 Resource Records
RFC1035 DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION 3.2.1 Format 3.2.2 TYPE values 3.3.9 MX RDATA format