Dnstop: Difference between revisions

From OnnoCenterWiki
Jump to navigationJump to search
Onnowpurbo (talk | contribs)
69,477 edits
Onnowpurbo (talk | contribs)
69,477 edits
New page: dnstop is a libpcap application (ala tcpdump) that displays various tables of DNS traffic on your network. Currently dnstop displays tables of: Source IP addresses Destination IP addresse...
 
Onnowpurbo (talk | contribs)
69,477 edits
No edit summary
 
(4 intermediate revisions by the same user not shown)
Line 1: Line 1:
dnstop is a libpcap application (ala tcpdump) that displays various tables of DNS traffic on your network. Currently dnstop displays tables of:
dnstop adalah sebuah aplikasi libpcap (seperti tcpdump) yang akan menayangkan berbagai tabel dari traffic DNS di jaringan kita.
Saat ini, dnstop akan menampilkan tabel:


Source IP addresses
Source IP addresses
Destination IP addresses
Destination IP addresses
Query types
Query types
Response codes
Response codes
Opcodes
Opcodes
Top level domains
Top level domains
Second level domains
Second level domains
Third level domains
Third level domains
etc...
dll ..


dnstop supports both IPv4 and IPv6 addresses.
dnstop mendukung IPv4 dan IPv6 address


To help find especially undesirable DNS queries, dnstop provides a number of filters. The filters tell dnstop to display only the following types of queries:
Untuk memudahkan dalam mencari DNS query yang tidak di inginkan, dnstop memberikan beberapa filter. Filter akan memerintahkan dnstop untuk menayangkan hanya tipe query berikut:


For unknown/invalid TLDs
For unknown/invalid TLDs
A queries where the query name is already an IP address
A queries where the query name is already an IP address
PTR queries for RFC1918 address space
PTR queries for RFC1918 address space
Responses with code REFUSED
Responses with code REFUSED


dnstop can either read packets from the live capture device, or from a tcpdump savefile.
dnstop dapat membaca packet dari live capture device, atau dari tcpdump savefile.


Install DNSTOP on ubuntu
==Install DNSTOP==


Open the terminal and run the following comamnd
sudo apt-get install dnstop


    sudo apt-get install dnstop
==DNSTOP Syntax==


DNSTOP Syntax
Penggunaan


    dnstop [-46apsQR] [-b expression] [-i address] [-f filter] [-r interval] [device] [savefile]
usage: dnstop [opts] netdevice|savefile
-4 Count IPv4 packets
-6 Count IPv6 packets
-Q Count queries
-R Count responses
-a Anonymize IP Addrs
-b expr BPF program code
-i addr Ignore this source IP address
-n name Count only messages in this domain
-p Don't put interface in promiscuous mode
-P Print "progress" messages in non-interactive mode
-r Redraw interval, in seconds
-l N Enable domain stats up to N components
-X Don't tabulate the "source + query name" stats
-f filter-name
Available filters:
unknown-tlds
A-for-A
rfc1918-ptr
refused
qtype-any


Command line Options


The options are as follows:
Contoh, dengan -l 2, dnstop akan menyimpan dua tabel: satu dengan top-level domain name, dan satu lagi dengan second-level domain name.
Menambahkan level akan memberikan data yang lebih detail, tapi juga membutuhkan memory & CPU.


-4 -- count only messages with IPv4 addresses
==Contoh==
-6 -- count only messages with IPv6 addresses
-Q -- count only DNS query messages
-R -- count only DNS reply messages
-a -- anonymize addresses
-b expression -- BPF filter expression default: udp port 53)
-i address -- ignore select addresses
-p -- Do not put the interface into promiscuous mode.
-r -- Redraw interval (seconds).
-l level -- keep counts on names up to level domain name levels.


For example, with -l 2 (the default), dnstop will keep two tables: one with top-level domain names, and another with second-level domain names. Increasing the level provides more details,but also requires more memory and CPU.
dnstop eth0


-f -- input filter name
Contoh hasil
 
The "unknown-tlds" filter includes only queries for TLDs that are bogus.Useful for identifying hosts/servers that leak queries for things like "localhost" or "workgroup."
 
The "A-for-A" filter includes only A queries for names that are already IP addresses. Certain Microsoft Windows DNS servers have a known bug that forward these queries.
 
The "rfc1918-ptr" filter includes only PTR queries for addresses in RFC1918 space. These should never leak from inside an organi-zation.
 
The "refused" filter, when used with the -R option, tells dnstop to count only replies with rcode REFUSED.
 
The "qtype-any" filter tells dnstop to count only message of type ANY.
 
-n name -- Only count messages within the domain name
 
-P -- Print "progress" messages on stderr when in non-interactive mode.
 
-B buckets -- Use buckets hash table buckets.
 
-X -- Do not tabulate the sources + query name counters. This can significantly reduce memory usage on busy servers and large save files.
 
savefile -- a captured network trace in pcap format
 
device -- ethernet device (ie fxp0)
 
Example
 
    dnstop eth0




Queries: 0 new, 179 total                                                                                              Wed Jun 24 12:47:25 2015
Sources          Count      %  cum%
------------- --------- ------ ------
192.168.10.11      179  100.0  100.0


==Referensi==
==Referensi==


* http://www.ubuntugeek.com/dnstop-stay-on-top-of-your-dns-traffic.html
* http://www.ubuntugeek.com/dnstop-stay-on-top-of-your-dns-traffic.html

Latest revision as of 05:54, 24 June 2015

dnstop adalah sebuah aplikasi libpcap (seperti tcpdump) yang akan menayangkan berbagai tabel dari traffic DNS di jaringan kita. Saat ini, dnstop akan menampilkan tabel: 

Source IP addresses
Destination IP addresses
Query types
Response codes
Opcodes
Top level domains
Second level domains
Third level domains
dll ..

dnstop mendukung IPv4 dan IPv6 address

Untuk memudahkan dalam mencari DNS query yang tidak di inginkan, dnstop memberikan beberapa filter. Filter akan memerintahkan dnstop untuk menayangkan hanya tipe query berikut: 

For unknown/invalid TLDs
A queries where the query name is already an IP address
PTR queries for RFC1918 address space
Responses with code REFUSED

dnstop dapat membaca packet dari live capture device, atau dari tcpdump savefile.

Install DNSTOP

sudo apt-get install dnstop

DNSTOP Syntax

Penggunaan 

usage: dnstop [opts] netdevice|savefile
	-4	Count IPv4 packets
	-6	Count IPv6 packets
	-Q	Count queries
	-R	Count responses
	-a	Anonymize IP Addrs
	-b expr	BPF program code
	-i addr	Ignore this source IP address
	-n name	Count only messages in this domain
	-p	Don't put interface in promiscuous mode
	-P	Print "progress" messages in non-interactive mode
	-r	Redraw interval, in seconds
	-l N	Enable domain stats up to N components
	-X	Don't tabulate the "source + query name" stats
	-f	filter-name

Available filters:
	unknown-tlds
	A-for-A
	rfc1918-ptr
	refused
	qtype-any


Contoh, dengan -l 2, dnstop akan menyimpan dua tabel: satu dengan top-level domain name, dan satu lagi dengan second-level domain name. Menambahkan level akan memberikan data yang lebih detail, tapi juga membutuhkan memory & CPU.

Contoh

dnstop eth0

Contoh hasil 


Queries: 0 new, 179 total                                                                                              Wed Jun 24 12:47:25 2015

Sources           Count      %   cum%
------------- --------- ------ ------
192.168.10.11       179  100.0  100.0

Referensi

Retrieved from "https://lms.onnocenter.or.id/wiki/index.php?title=Dnstop&oldid=43643"