What port does tcpdump use?

Posted on February 28, 2020
by Yunus Cook
February 28, 2020
0 comments

What port does tcpdump use?

Tcpdump works on most Unix-like operating systems: Linux, Solaris, FreeBSD, DragonFly BSD, NetBSD, OpenBSD, OpenWrt, macOS, HP-UX 11i, and AIX. In those systems, tcpdump uses the libpcap library to capture packets. The port of tcpdump for Windows is called WinDump; it uses WinPcap, the Windows version of libpcap.

How do I use tcpdump in Linux?

Most OS have tcpdump command pre-installed, if it is not installed you can install using following commands.

sudo yum install tcpdump (RedHat based Linux OS)
sudo apt-get install tcpdump (Ubuntu/Debian OS)

How do I open tcpdump in Wireshark?

Start Wireshark, then import the tcpdump captured session using File -> Open and browse for your file. You can also double-click the tcpdump capture file to open it in Wireshark, as long as it has the *.

How do I read a tcpdump file in Linux?

The “-w” option lets you write the output of tcpdump to a file which you can save for further analysis. The “-r” option lets you read the output of a file. All you have to do is use the “-r” option with tcpdump command and specify the path of the file you want to read.

Where is tcpdump installed on Linux?

It comes with many flavors of Linux. To find out, type which tcpdump in your terminal. On CentOS, it’s at /usr/sbin/tcpdump. If it’s not installed, you can install it using sudo yum install -y tcpdump or via the available packager manager on your system like apt-get.

What is the difference between nmap and Wireshark?

Wireshark is mostly generic scanning and hence returns details of every request that is made in the network. Nmap allows applications to learn about the other computers that are available on the network. Wireshark allows an application to learn what is being sent or receive on one’s computer.

Can you use Wireshark remotely?

One of the cool things you can do with Wireshark is capture packets on remote servers or systems. You will need Wireshark installed on a local system ofcourse. Then you will also need the WinPcap applet installed on the remote Windows system or server.