dsniff is a collection of tools for network auditing and penetration testing.
dsniff, filesnarf, mailsnarf, msgsnarf, urlsnarf, and webspy passively monitor a network for interesting data (passwords, e-mail, files, etc.).
The name dSniff refers both to the package of such tools and one eponymous tool (“dSniff”) included within.
Features include:
- arpspoof – redirect packets from a target host (or all hosts) on the LAN intended for another local host by forging ARP replies.
- dnsspoof – forge replies to arbitrary DNS address / pointer queries on the LAN.
- dsniff – password sniffer. handles FTP, Telnet, SMTP, HTTP, POP, poppass, NNTP, IMAP, SNMP, LDAP, Rlogin, RIP, OSPF, PPTP, MS-CHAP, NFS, VRRP, YP/NIS, SOCKS, X11, CVS, IRC, AIM, ICQ, Napster, PostgreSQL, Meeting Maker, Citrix ICA, Symantec pcAnywhere, NAI Sniffer, Microsoft SMB, Oracle SQL*Net, Sybase and Microsoft SQL auth info.
- filesnarf – saves selected files sniffed from NFS traffic in the current working directory.
- macof – flood the local network with random MAC addresses (causing some switches to fail open in repeating mode, facilitating sniffing).
- mailsnarf – a fast and easy way to violate the Electronic Communications Privacy Act of 1986.
- msgsnarf – record selected messages from sniffed AOL Instant Messenger, ICQ 2000, IRC, and Yahoo! Messenger chat sessions.
- sshmitm – SSH monkey-in-the-middle. proxies and sniffs SSH traffic redirected by dnsspoof, capturing SSH password logins, and optionally hijacking interactive sessions.
- tcpkill – kills specified in-progress TCP connections.
- tcpnice – slow down specified TCP connections via “active” traffic shaping.
- urlsnarf – output selected URLs sniffed from HTTP traffic in CLF (Common Log Format, used by almost all web servers).
- webmitm – HTTP / HTTPS monkey-in-the-middle. transparently proxies and sniffs web traffic redirected by dnsspoof, capturing most “secure” SSL-encrypted webmail logins and form submissions.
- webspy – sends URLs sniffed from a client to your local browser for display.
Website: monkey.org/~dugsong/dsniff
Support: FAQ
Developer: Dug Song
License: Freely distributable
dsniff is written in C. Learn C with our recommended free books and free tutorials.
| Popular series | |
|---|---|
 | The largest compilation of the best free and open source software in the universe. Each article is supplied with a legendary ratings chart helping you to make informed decisions. |
 | Hundreds of in-depth reviews offering our unbiased and expert opinion on software. We offer helpful and impartial information. |
 | Replace proprietary software with open source alternatives: Google, Microsoft, Apple, Adobe, IBM, Autodesk, Oracle, Atlassian, Corel, Cisco, Intuit, and SAS. |
 | Awesome Free Linux Games Tools showcases a series of tools that making gaming on Linux a more pleasurable experience. This is a new series. |
 | Machine Learning explores practical applications of machine learning and deep learning from a Linux perspective. We've written reviews of more than 40 self-hosted apps. All are free and open source. |
 | New to Linux? Read our Linux for Starters series. We start right at the basics and teach you everything you need to know to get started with Linux. |
 | Alternatives to popular CLI tools showcases essential tools that are modern replacements for core Linux utilities. |
 | Essential Linux system tools focuses on small, indispensable utilities, useful for system administrators as well as regular users. |
 | Linux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine. |
 | Surveys popular streaming services from a Linux perspective: Amazon Music Unlimited, Myuzi, Spotify, Deezer, Tidal. |
 | Saving Money with Linux looks at how you can reduce your energy bills running Linux. |
 | Home computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum. |
 | Now and Then examines how promising open source software fared over the years. It can be a bumpy ride. |
 | Linux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged. |
 | Linux Candy reveals the lighter side of Linux. Have some fun and escape from the daily drudgery. |
 | Getting Started with Docker helps you master Docker, a set of platform as a service products that delivers software in packages called containers. |
 | Best Free Android Apps. We showcase free Android apps that are definitely worth downloading. There's a strict eligibility criteria for inclusion in this series. |
 | These best free books accelerate your learning of every programming language. Learn a new language today! |
 | These free tutorials offer the perfect tonic to our free programming books series. |
 | Linux Around The World showcases usergroups that are relevant to Linux enthusiasts. Great ways to meet up with fellow enthusiasts. |
 | Stars and Stripes is an occasional series looking at the impact of Linux in the USA. |