| author | Oleksandr Gavenko <gavenkoa@gmail.com> |
| Mon, 16 Sep 2019 22:13:19 +0300 | |
| changeset 2376 | 20b65f046002 |
| parent 2204 | fa97eaac3276 |
| child 2445 | b996f619baaf |
| permissions | -rw-r--r-- |
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1862
f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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1 |
.. -*- coding: utf-8; -*- |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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====== |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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changeset
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DNS. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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5 |
====== |
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1911
870693ce6ff0
Fix my RST article style by 'check-format-policy' target.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1887
diff
changeset
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6 |
.. contents:: |
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870693ce6ff0
Fix my RST article style by 'check-format-policy' target.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1887
diff
changeset
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7 |
:local: |
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1862
f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
9 |
About DNS resolving protocol. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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10 |
============================= |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
12 |
Default port for name resolving is ``53``:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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13 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
14 |
$ nslookup -port=53 microsoft.com |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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15 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
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Debugging name resolution. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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17 |
========================== |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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18 |
:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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19 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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20 |
$ nslookup -debug microsoft.com |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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changeset
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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changeset
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22 |
Dumping all available resords:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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changeset
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
24 |
$ nslookup -type=any microsoft.com |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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25 |
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1863
1532554ca0b4
Timing information and traces.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1862
diff
changeset
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26 |
Timing information and traces available via:: |
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1532554ca0b4
Timing information and traces.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1862
diff
changeset
|
27 |
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1532554ca0b4
Timing information and traces.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1862
diff
changeset
|
28 |
$ dig +trace google.com |
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1532554ca0b4
Timing information and traces.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1862
diff
changeset
|
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$ dig @8.8.4.4 +noall +answer +stats A defun.work |
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1532554ca0b4
Timing information and traces.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1862
diff
changeset
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30 |
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d64682ab74a2
``+additional`` option
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1863
diff
changeset
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31 |
Despite ``dig`` shown only names for NS replays also have IP adresses (to avoid |
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d64682ab74a2
``+additional`` option
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1863
diff
changeset
|
32 |
chicken/egg ptoblem when you request name resolution but asked to resolve |
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d64682ab74a2
``+additional`` option
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1863
diff
changeset
|
33 |
another name). To see IP addressed use ``+additional`` option:: |
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d64682ab74a2
``+additional`` option
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1863
diff
changeset
|
34 |
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d64682ab74a2
``+additional`` option
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1863
diff
changeset
|
35 |
$ dig +trace +additional google.com |
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d64682ab74a2
``+additional`` option
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1863
diff
changeset
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36 |
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1862
f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
37 |
IP from host name. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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38 |
================== |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
39 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
40 |
This request is for the ``A`` record and default for ``nslookup`` command:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
41 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
42 |
$ nslookup defun.work |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
43 |
$ nslookup -type=a defun.work |
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1863
1532554ca0b4
Timing information and traces.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1862
diff
changeset
|
44 |
$ nslookup -type=a defun.work 8.8.8.8 |
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1532554ca0b4
Timing information and traces.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1862
diff
changeset
|
45 |
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1532554ca0b4
Timing information and traces.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1862
diff
changeset
|
46 |
$ dig @8.8.8.8 A defun.work |
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1532554ca0b4
Timing information and traces.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1862
diff
changeset
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47 |
$ dig +nocmd +noall +answer defun.work |
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1862
f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
48 |
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| 2204 | 49 |
Host name from IP |
50 |
================= |
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1862
f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
51 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
52 |
If that information available:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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53 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
54 |
$ nslookup -type=ptr 8.8.8.8 |
| 2204 | 55 |
$ dig @8.8.8.8 -x 8.8.4.4 |
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1862
f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
56 |
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| 2204 | 57 |
$ dig +noall +answer @8.8.8.8 PTR 4.4.8.8.in-addr.arpa |
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4.4.8.8.in-addr.arpa. 21599 IN PTR google-public-dns-b.google.com. |
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$ host 8.8.4.4 |
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4.4.8.8.in-addr.arpa domain name pointer google-public-dns-b.google.com. |
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1862
f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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62 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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63 |
List authoritative NS for domain. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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64 |
================================= |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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65 |
:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
66 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
67 |
$ dig ns defun.work |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
68 |
$ nslookup -type=ns defun.work |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
69 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
70 |
List MX records for domain. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
71 |
=========================== |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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72 |
:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
73 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
74 |
$ dig mx mail.google.com |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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75 |
$ nslookup -type=mx mail.google.com |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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76 |
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889e37c1c5b5
Query for TXT records.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1874
diff
changeset
|
77 |
Query for TXT records. |
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889e37c1c5b5
Query for TXT records.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1874
diff
changeset
|
78 |
====================== |
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889e37c1c5b5
Query for TXT records.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1874
diff
changeset
|
79 |
:: |
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889e37c1c5b5
Query for TXT records.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1874
diff
changeset
|
80 |
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889e37c1c5b5
Query for TXT records.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1874
diff
changeset
|
81 |
$ dig -t TXT google.com |
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889e37c1c5b5
Query for TXT records.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1874
diff
changeset
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82 |
$ dig google.com TXT |
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889e37c1c5b5
Query for TXT records.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1874
diff
changeset
|
83 |
$ nslookup -type=txt google.com |
| 1887 | 84 |
$ nslookup -q=txt google.com |
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889e37c1c5b5
Query for TXT records.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1874
diff
changeset
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85 |
$ host -t txt google.com |
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889e37c1c5b5
Query for TXT records.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
1874
diff
changeset
|
86 |
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1862
f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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87 |
List SOA records for domain. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
88 |
============================ |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
89 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
90 |
SOA ("Start Of Authority") Record for a domain provides technical information
|
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
91 |
about the domain:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
92 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
93 |
$ dig soa defun.work |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
94 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
95 |
Human readable format can be viewed via:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
96 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
97 |
$ nslookup -type=mx defun.work |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
98 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
99 |
origin = ns1.mindsandmachines.com |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
100 |
mail addr = admin.mindsandmachines.com |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
101 |
serial = 2011091101 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
102 |
refresh = 10800 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
103 |
retry = 7200 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
104 |
expire = 604800 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
105 |
minimum = 86400 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
106 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
107 |
Email adress for domain administrator is ``admin@mindsandmachines.com`` for |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
108 |
above output. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
109 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
110 |
List domain names. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
111 |
================== |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
112 |
:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
113 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
114 |
$ dig ns dp.gov.ua |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
115 |
... |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
116 |
;; ANSWER SECTION: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
117 |
dp.gov.ua. 3600 IN NS ns.giknpc.com.ua. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
118 |
... |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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119 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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120 |
$ dig @ns.giknpc.com.ua dp.gov.ua AXFR |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
121 |
... |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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122 |
dp.gov.ua. 3600 IN MX 200 relay2.giknpc.com.ua. |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
123 |
dp.gov.ua. 3600 IN A 195.64.190.1 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
124 |
adm.dp.gov.ua. 3600 IN A 195.64.190.1 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
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Get info about NS. |
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================== |
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Version of running NS:: |
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$ dig @4.2.2.1 version.bind chaos txt |
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$ nslookup -q=txt -class=CHAOS version.bind. 4.2.2.1 |
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Server name:: |
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$ dig @4.2.2.1 id.server txt chaos |
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$ nslookup -q=txt -class=CHAOS id.server. 4.2.2.1 |
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$ dig @4.2.2.1 hostname.bind txt chaos |
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$ nslookup -q=txt -class=CHAOS hostname.bind. 4.2.2.1 |
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That strings come from BIND config:: |
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options {
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version "none of your business"; |
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server-id "Host A"; |
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hostname "Host A"; |
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}; |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
150 |
How reread config file? |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
151 |
======================= |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
152 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
153 |
FreeBSD:: |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
154 |
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f4e844aa1217
Debugging name resolution.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
diff
changeset
|
155 |
$ named.reload |