TCP connection problems

When two TCP processes wish to communicate, they open the connection, send the data, and then close the connection. This happens when you open a browser to the Internet, connect from your mail client to the mail server, or connect with Telnet to your router or any other application that works over TCP.

When TCP opens the connection, it sends a request for open connection from the source port to destination port.

Some problems can occur during the establishment or closing of the application. Using Wireshark to locate and solve these problems is the goal of this recipe.

Getting ready

If you experience one of the following problems, use Wireshark in order to find out what is the reason for it.

These problems can be of many types. ...

Get Wireshark Revealed: Essential Skills for IT Professionals now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.