<div>
If the requests are truly passing through the box, then tcpdump will capture anything and everything.<br />
<br />
You can limit tcpdump to just capturing udp and tcp port 53 to limit the amount of data you capture.
</div>


If the requests are truly passing through the box, then tcpdump will capture anything and everything.

You can limit tcpdump to just capturing udp and tcp port 53 to limit the amount of data you capture.

<div>
no i want to see sth like tshark result <br />
<br />
source ip <br />
destination ip<br />
requested record (like google.com)
</div>


no i want to see sth like tshark result

source ip
destination ip
requested record (like google.com)

<div>
You can try:<br />
<br />
tcpdump -s 0 -t -v -n port 53<br />
<br />
This will show you in real time anything for port 53. &nbsp;It will show source and destination IP address and what the query request and response was.<br />
<br />
I assumed you wanted the output saved to a file, so I assumed you were going to use the -w option and write the capture to a file to look at later.
</div>


You can try:

tcpdump -s 0 -t -v -n port 53

This will show you in real time anything for port 53.  It will show source and destination IP address and what the query request and response was.

I assumed you wanted the output saved to a file, so I assumed you were going to use the -w option and write the capture to a file to look at later.

<div>
try wireshark for once, it has user friendly output.<br />
<br />
TY/SA
</div>


try wireshark for once, it has user friendly output.

TY/SA

<div>
<div class="content wysiwyg-content">
Is there any software that show and log the dns query's from TCPdump or sth like that &nbsp;on cent os? <br />
<br />
We have a cent os server which is just a transparent bridge on UDP 53 port's trafic. So we want to trace the requests on this server from tcpdump is it possible ?
</div>
</div>


Is there any software that show and log the dns query's from TCPdump or sth like that  on cent os? 

We have a cent os server which is just a transparent bridge on UDP 53 port's trafic. So we want to trace the requests on this server from tcpdump is it possible ?

Watch DNS requests

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.