CL_RFC2308_8_cache_SOA - Caching of SOA record
Verify that a NUT caches SOA record from the authority section for query tuple.
Client (with Caching function)
CL_RFC2308_8_cache_SOA.seq [-tooloption ...]: KOI tool option See also DNSConfig.pm
AP Server1(TN):A.example.com DNS Server1(TN) |3ffe:501:ffff:101::10 |3ffe:501:ffff:101::20 |192.168.1.10 |192.168.1.20 | | Net-y --+--------+-----------------------+-------- 3ffe:501:ffff:101::/64 | 192.168.1/24 | | ROUTER1(TN) |3ffe:501:ffff:100::1 |192.168.0.1 | Net-z --+--------+-------------------------------- 3ffe:501:ffff:100::/64 | 192.168.0/24 DNS Client1(NUT) 3ffe:501:ffff:100:XXXX 192.168.0.10
XXXX: EUI64 address
Set the DNS Server1(TN)'s address on NUT as above mentioned Network Topology.
In order to send the query for A type(IN class) of AP Server1(TN):A.example.com to the DNS Server1(TN), NUT is configured.
This test sequence is following.
DNS Client1 (NUT) DNS Server1 (TN) | | |--------------------------------------------->| | 1. Send standard query | | QNAME=A.example.com | | QTYPE=A | | | |<---------------------------------------------| | 2. Standard query response | | NODATA | | | |------------------------------------------> X | | 3. Send standard query | | QNAME=A.example.com | | QTYPE=A | | | |--------------------------------------------->| | 4. Send standard query | | QNAME=example.com | | QTYPE=SOA | | | v v
1. NUT send standard query to TN. Judgment (Check *1) 2. TN send standard query response to NUT. 3. NUT send standard query to TN. Judgment (Check *3) 4. NUT send standard query to TN. Judgment (Check *4)
|
||
IP Header | Source Address | NUT_NETZ |
Destination Address | SV_NETY | |
UDP Header |
Src Port |
any |
Dst Port |
53 |
|
DNS Header |
ID | any |
QR |
0 |
|
OPCODE |
0 |
|
AA |
any |
|
TC | 0 | |
RD | any | |
RA |
any |
|
Z |
any |
|
RCODE |
any |
|
QDCOUNT |
1 |
|
ANCOUNT |
0 |
|
NSCOUNT |
0 |
|
ARCOUNT |
any |
|
DNS Question section |
QNAME | A.example.com |
QTYPE |
A (0x0001) |
|
QCLASS |
IN (0x0001) |
|
||
IP Header | Source Address | SV_NETY |
Destination Address | NUT_NETZ | |
UDP Header | Src Port | 53 |
Dst Port | Same as 1st Packet's Src Port | |
DNS Header | ID | Same as 1st Packet's ID |
QR | 1 | |
OPCODE | 0 | |
AA | 1 | |
TC | 0 | |
RD | Same as 1st Packet's RD | |
RA | 0 | |
Z | 0 | |
RCODE | 0 | |
QDCOUNT | 1 | |
ANCOUNT | 0 | |
NSCOUNT | 1 | |
ARCOUNT | 0 | |
DNS Question section | QNAME | A.example.com |
QTYPE | A (0x0001) | |
QCLASS | IN (0x0001) | |
DNS Authority section | NAME | example.com (Pointer 0xC00E) |
TYPE | SOA (0x0006) | |
CLASS | IN (0x0001) | |
TTL | 1 hour (3600) | |
RDLENGTH | 33 | |
MNAME | NS1.example.com (NS1 + Pointer 0xC00E) | |
RNAME | root.example.com (root + Pointer 0xC00E) | |
SERIAL | 2005080300 | |
REFRESH | 1 hour | |
RETRY | 15 minutes | |
EXPIRE | 1 week | |
MINIMUM | 1 hour (3600) |
|
||
IP Header | Source Address | NUT_NETZ |
Destination Address | SV_NETY | |
UDP Header |
Src Port |
any |
Dst Port |
53 |
|
DNS Header |
ID | any |
QR |
0 |
|
OPCODE |
0 |
|
AA |
any |
|
TC | 0 | |
RD | any | |
RA |
any |
|
Z |
any |
|
RCODE |
any |
|
QDCOUNT |
1 |
|
ANCOUNT |
0 |
|
NSCOUNT |
0 |
|
ARCOUNT |
any |
|
DNS Question section |
QNAME | example.com |
QTYPE |
SOA (0x0006) |
|
QCLASS |
IN (0x0001) |
1. Received standard query QNAME=A.example.com from NUT. 3. Not received standard query QNAME=A.example.com from NUT. 4. Received standard query QNAME=example.com from NUT.
If NUT has cache function, clear the cache.
RFC2308 Negative Caching of DNS Queries (DNS NCACHE) 8 - Changes from RFC 1034