December 2013
Intermediate to advanced
452 pages
9h 45m
English
Content preview from Network Analysis using Wireshark CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Analyzing FTP problems
File Transfer Protocol (FTP) is a protocol created for transferring files over TCP/IP across a network. FTP is a protocol that runs over TCP ports 20 and 21 for the data and control connections (FTP commands) respectively.
FTP has two modes of operation:
- Active mode (ACTV): In this mode, the client initiates a control connection to the server, and the server initiates a data connection to the client
- Passive mode (PASV): In this mode, the client initiates the control and data connections to the server
Both types of connections can be implemented, and they will be explained later in this recipe in the How it works... section.
Getting ready
When working with FTP, if you suspect any connectivity or slow response problems, configure ...
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