SV_RFC2308_8_cache_SOA - Caching of SOA record
Verify that a NUT caches SOA record from the authority section for query tuple.
- The SOA record from the authority section MUST be cached. Name error
indications must be cached against the tuple "query name, QCLASS".
No data indications must be cached against "query name, QTYPE,
QCLASS" tuple.
A cached SOA record must be added to the response. This was
explicitly not allowed because previously the distinction between a
normal cached SOA record, and the SOA cached as a result of a
negative response was not made, and simply extracting a normal cached
SOA and adding that to a cached negative response causes problems.
Caching Server
SV_RFC2308_8_cache_SOA.seq [-tooloption ...]: KOI tool option
See also DNSConfig.pm
This test sequence is following.
<-------------- TN --------------->
DNS Client1 (TN) DNS Server1 (NUT) DNS Server2 DNS Server3 DNS Server4
| | | | |
|----------------------------->| | | |
| 1. Send standard query | | | |
| QNAME=B.example.org | | | |
| QTYPE=A | | | |
| | | | |
| |-------------------------------->| | |
| | 2. Recv standard query | | |
| | QNAME=B.example.org | | |
| | QTYPE=A | | |
| | | | |
| |<--------------------------------| | |
| | 3. Send standard query response | | |
| | QNAME=B.example.org | | |
| | QTYPE=A | | |
| | AUTHORITY Name=org | | |
| | AUTHORITY Name Server | | |
| | =NS3.example.org | | |
| | ADDITIONAL Name | | |
| | =NS3.example.org | | |
| | ADDITIONAL Address | | |
| | =192.168.1.30 | | |
| | | | |
| | v | |
| | | |
| |-------------------------------------------->| |
| | 4. Recv standard query | |
| | QNAME=B.example.org | |
| | QTYPE=A | |
| | | |
| |<--------------------------------------------| |
| | 5. Send standard query response | |
| | QNAME=B.example.org | |
| | QTYPE=A | |
| | AUTHORITY Name=example.org | |
| | AUTHORITY Name Server | |
| | = NS4.example.org | |
| | ADDITIONAL Name | |
| | = NS4.example.org | |
| | ADDITIONAL Address | |
| | = 192.168.1.40 | |
| | | |
| | v |
| | |
| |-------------------------------------------------------->|
| | 6. Send standard query |
| | QNAME=B.example.org |
| | QTYPE=A |
| | |
| |<--------------------------------------------------------|
| | 7. Send standard query response|
| | RCODE=3(NXDOMIN) |
| | QNAME=B.example.org |
| | QTYPE=A |
| | AUTHORITY Name=example.org |
| | AUTHORITY Type=SOA |
| | AUTHORITY Minimum=1 hour |
| | |
| | |
|<-----------------------------| |
| 8. Standard query response | |
| RCODE= 3(NXDOMIN) | |
| QNAME= B.example.org | |
| QTYPE=A | |
| AUTHORITY Name=example.org | |
| AUTHORITY Type=SOA | |
| AUTHORITY Minimum=1 hour | |
| | |
|----------------------------->| |
| 9. Send standard query | |
| QNAME=B.example.org | |
| QTYPE=A | |
| | |
|<-----------------------------| |
|10. Standard query response | |
| RCODE= 3(NXDOMIN) | |
| QNAME= B.example.org | |
| QTYPE=A | |
| AUTHORITY Name=example.org | |
| AUTHORITY Type=SOA | |
| AUTHORITY TTL=less than | |
| 1 hour | |
| AUTHORITY Minimum=1 hour | |
| | |
|----------------------------->| |
|11. Send standard query | |
| QNAME=example.org | |
| QTYPE=SOA | |
| | |
| |-------------------------------------------------------->|
| | 12. Send standard query |
| | QNAME=example.org |
| | QTYPE=SOA |
v v v
1. TN send standard query QNAME=B.example.org, QTYPE=A to NUT.
2. NUT transmits standard query to DNS Server2 (TN: root name server) (Judgment *2)
3. TN send query response to NUT w/ AUTHORITY Name=org, AUTHORITY Name Server=NS3.example.org.
4. NUT transmits standard query QNAME=B.example.org, QTYPE=A to DNS Server3 (TN: NS3.example.org) (Judgment *4)
5. TN send query response to NUT w/ AUTHORITY Name=example.org, AUTHORITY Name Server=NS4.example.org.
6. NUT transmits standard query QNAME=B.example.org, QTYPE=A to DNS Server4 (TN: NS4.example.org) (Judgment *6)
7. TN send query response(NXDOMAIN) to AUTHORITY Name=example.org, AUTHORITY Type=SOA.
8. NUT transmits query response(NXDOMAIN) to DNS Client1 (TN) (Judgment *8)
9. TN send standard query QNAME=B.example.org, QTYPE=A to NUT.
10. NUT transmits query response(NXDOMAIN) to DNS Client1 (TN) (Judgment *10)
11. TN send standard query QNAME=example.org, QTYPE=SOA to NUT.
12. NUT transmits standard query QNAME=example.org, QTYPE=SOA to DNS Server4 (TN: NS4.example.org) (Judgment *12)
- Packet Description
- 1st packet.
Standard query from DNS Client1 (TN) to Server1 (NUT)
|
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 |
B.example.org |
QTYPE |
A (0x0001) |
QCLASS |
IN (0x0001) |
- 2nd packet.
Standard query from DNS Server1 (NUT) to Server2 (TN)
|
IP Header |
Source Address |
NUT_NETZ |
Destination Address |
SV2_NETY |
UDP Header |
Src Port |
ANY |
Dst Port |
53 |
DNS Header |
ID |
ANY |
QR |
0 |
OPCODE |
0 |
AA |
ANY |
TC |
0 |
RD |
0 |
RA |
ANY |
Z |
ANY |
RCODE |
ANY |
QDCOUNT |
1 |
ANCOUNT |
0 |
NSCOUNT |
0 |
ARCOUNT |
ANY |
DNS Question section |
QNAME |
B.example.org |
QTYPE |
A (0x0001) |
QCLASS |
IN (0x0001) |
- 3rd packet.
Standard query response from DNS Server2 (TN) to Server1 (NUT)
|
IP Header |
Source Address |
SV2_NETY |
Destination Address |
NUT_NETZ |
UDP Header |
Src Port |
53 |
Dst Port |
Value that NUT uses |
DNS Header |
ID |
Value that NUT uses |
QR |
1 |
OPCODE |
0 |
AA |
0 |
TC |
0 |
RD |
0 |
RA |
0 |
Z |
0 |
RCODE |
0 |
QDCOUNT |
1 |
ANCOUNT |
0 |
NSCOUNT |
1 |
ARCOUNT |
1 |
DNS Question section |
QNAME |
B.example.org
|
QTYPE |
A (0x0001) |
QCLASS |
IN (0x0001) |
DNS Authority section |
NAME |
org (Pointer 0xC016) |
TYPE |
NS (0x0002) |
CLASS |
IN (0x0001) |
TTL |
1 day (86400) |
RDLENGTH |
6 |
NSDNAME |
NS3.example.org (NS3 + Pointer 0xC00E) |
DNS Additional section |
NAME |
NS3.example.org (Pointer 0xC02B) |
TYPE
|
A (0x0001) |
CLASS |
IN (0x0001) |
TTL |
1 day (86400) |
RDLENGTH |
4 |
ADDRESS |
192.168.1.30 |
- 4th packet.
Standard query from DNS Server1 (NUT) to Server3 (TN)
|
IP Header |
Source Address |
NUT_NETZ |
Destination Address |
SV3_NETY |
UDP Header |
Src Port |
ANY |
Dst Port |
53 |
DNS Header |
ID |
ANY |
QR |
0 |
OPCODE |
0 |
AA |
ANY |
TC |
0 |
RD |
0 |
RA |
ANY |
Z |
ANY |
RCODE |
ANY |
QDCOUNT |
1 |
ANCOUNT |
0 |
NSCOUNT |
0 |
ARCOUNT |
ANY |
DNS Question section |
QNAME |
B.example.org |
QTYPE |
A (0x0001) |
QCLASS |
IN (0x0001) |
- 5th packet.
Standard query response from DNS Server3 (TN) to Server1 (NUT)
|
IP Header |
Source Address |
SV3_NETY |
Destination Address |
NUT_NETZ |
UDP Header |
Src Port |
Value that NUT uses |
Dst Port |
53 |
DNS Header |
ID |
Value that NUT uses |
QR |
1 |
OPCODE |
0 |
AA |
0 |
TC |
0 |
RD |
0 |
RA |
0 |
Z |
0 |
RCODE |
0 |
QDCOUNT |
1 |
ANCOUNT |
0 |
NSCOUNT |
1 |
ARCOUNT |
1 |
DNS Question section |
QNAME |
B.example.org
|
QTYPE |
A (0x0001) |
QCLASS |
IN (0x0001) |
DNS Authority section |
NAME |
example.org (Pointer 0xC00E) |
TYPE |
NS (0x0002) |
CLASS |
IN (0x0001) |
TTL |
1 day (86400) |
RDLENGTH |
6 |
NSDNAME |
NS4.example.org (NS4 + Pointer 0xC00E) |
DNS Additional section |
NAME |
NS4.example.org (Pointer 0xC02B) |
TYPE
|
A (0x0001) |
CLASS |
IN (0x0001) |
TTL |
1 day (86400) |
RDLENGTH |
4 |
ADDRESS |
192.168.1.40 |
- 6th packet.
Standard query from DNS Server1 (NUT) to Server4 (TN)
|
IP Header |
Source Address |
NUT_NETZ |
Destination Address |
SV4_NETY |
UDP Header |
Src Port |
ANY |
Dst Port |
53 |
DNS Header |
ID |
ANY |
QR |
0 |
OPCODE |
0 |
AA |
ANY |
TC |
0 |
RD |
0 |
RA |
ANY |
Z |
ANY |
RCODE |
ANY |
QDCOUNT |
1 |
ANCOUNT |
0 |
NSCOUNT |
0 |
ARCOUNT |
ANY |
DNS Question section |
QNAME |
B.example.org |
QTYPE |
A (0x0001) |
QCLASS |
IN (0x0001) |
- 7th packet.
Standard query response from DNS Server4 (TN) to Server1 (NUT)
|
IP Header |
Source Address |
SV4_NETY |
Destination Address |
NUT_NETZ |
UDP Header |
Src Port |
Value that NUT uses |
Dst Port |
53 |
DNS Header |
ID |
Value that NUT uses |
QR |
1 |
OPCODE |
0 |
AA |
1 |
TC |
0 |
RD |
0 |
RA |
1 |
Z |
0 |
RCODE |
3 |
QDCOUNT |
1 |
ANCOUNT |
0 |
NSCOUNT |
1 |
ARCOUNT |
0 |
DNS Question section |
QNAME |
B.example.org
|
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 |
NSDNAME |
NS4.example.com (NS4 + Pointer 0xC00E) |
RNAME |
root.example.com (root + Pointer 0xC00E) |
SERIAL |
2005081600 |
REFRESH |
1 hour |
RETRY |
15 minutes |
EXPIRE |
1 week |
MINIMUM |
1 hour (3600) |
- 8th packet.
Standard query response from DNS Server1 (NUT) to Client1 (TN)
|
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 |
0 |
TC |
0 |
RD |
1 |
RA |
1 |
Z |
0 |
RCODE |
3 |
QDCOUNT |
1 |
ANCOUNT |
0 |
NSCOUNT |
1 |
ARCOUNT |
0 |
DNS Question section |
QNAME |
B.example.org |
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 |
NSDNAME |
NS4.example.com (NS4 + Pointer 0xC00E) |
RNAME |
root.example.com (root + Pointer 0xC00E) |
SERIAL |
2005081600 |
REFRESH |
1 hour |
RETRY |
15 minutes |
EXPIRE |
1 week |
MINIMUM |
1 hour (3600) |
- 9th packet.
Standard query from DNS Client1 (TN) to Server1 (NUT)
|
IP Header |
Source Address |
CL1_NETZ |
Destination Address |
NUT_NETZ |
UDP Header |
Src Port |
2000 |
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 |
B.example.org |
QTYPE |
A (0x0001) |
QCLASS |
IN (0x0001) |
- 10th packet.
Standard query response from DNS Server1 (NUT) to Client1 (TN)
|
IP Header |
Source Address |
NUT_NETZ |
Destination Address |
CL1_NETZ |
UDP Header |
Src Port |
53 |
Dst Port |
2000 |
DNS Header |
ID |
0x1001 |
QR |
1 |
OPCODE |
0 |
AA |
0 |
TC |
0 |
RD |
1 |
RA |
1 |
Z |
0 |
RCODE |
3 |
QDCOUNT |
1 |
ANCOUNT |
0 |
NSCOUNT |
1 |
ARCOUNT |
0 |
DNS Question section |
QNAME |
B.example.org |
QTYPE |
A (0x0001) |
QCLASS |
IN (0x0001) |
DNS Authority section |
NAME |
example.com (Pointer 0xC00E) |
TYPE |
SOA (0x0006) |
CLASS |
IN (0x0001) |
TTL |
less than 1 hour |
RDLENGTH |
33 |
NSDNAME |
NS4.example.com (NS4 + Pointer 0xC00E) |
RNAME |
root.example.com (root + Pointer 0xC00E) |
SERIAL |
2005081600 |
REFRESH |
1 hour |
RETRY |
15 minutes |
EXPIRE |
1 week |
MINIMUM |
1 hour (3600) |
- 11th packet.
Standard query from DNS Client1 (TN) to Server1 (NUT)
|
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.org |
QTYPE |
SOA (0x0006) |
QCLASS |
IN (0x0001) |
- 12th packet.
Standard query from DNS Server1 (NUT) to Server4 (TN)
|
IP Header |
Source Address |
NUT_NETZ |
Destination Address |
SV4_NETY |
UDP Header |
Src Port |
ANY |
Dst Port |
53 |
DNS Header |
ID |
ANY |
QR |
0 |
OPCODE |
0 |
AA |
ANY |
TC |
0 |
RD |
0 |
RA |
ANY |
Z |
ANY |
RCODE |
ANY |
QDCOUNT |
1 |
ANCOUNT |
0 |
NSCOUNT |
0 |
ARCOUNT |
ANY |
DNS Question section |
QNAME |
example.org |
QTYPE |
SOA (0x0006) |
QCLASS |
IN (0x0001) |
- Exp.
NUT_NETZ |
DNS Server1's (NUT) Net-z address |
CL1_NETZ |
DNS Client1's (TN) Net-z address |
SV2_NETY |
DNS Server2's (TN) Net-y address |
SV3_NETY |
DNS Server3's (TN) Net-y address |
SV4_NETY |
DNS Server4's (TN) Net-y address |
2. Received standard query including QNAME=B.example.org, QTYPE=A.
4. Received standard query including QNAME=B.example.org, QTYPE=A.
6. Received standard query including QNAME=B.example.org, QTYPE=A.
8. Received standard query response(NXDOMAIN).
10. Received standard query response(NXDOMAIN).
12. Received standard query including QNAME=example.org, QTYPE=SOA.
None
RFC2308 Negative Caching of DNS Queries (DNS NCACHE)
8. Changes from RFC1034