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Posted 19 Jul 2004

Network Sniffer

, 19 Jul 2004
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Network Sniffer

Sample Image - Sniffer.jpg


A "Packet Sniffer" is a utility that sniffs without modifying the network's packets in any way. By comparison, a firewall sees all of a computer's packet traffic as well, but it has the ability to block and drop any packets that its programming dictates. Packet sniffers merely watch, display, and log this traffic.

One disturbingly powerful aspect of packet sniffers is their ability to place the hosting machine's network adapter into "promiscuous mode." Network adapters running in promiscuous mode receive not only the data directed to the machine hosting the sniffing software, but also ALL of the traffic on the physically connected local network.

I hope that this piece of code will help you understand the network better.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Eran Aharonovich
Software Developer
Australia Australia
Been a programmer since 1999.
Experience in:
.Net, C++, C#, VB, VB.NET, ASP, ASP.NET, DLLs, COM etc.

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Comments and Discussions

Questionworks for only Pin
Dmitry Gorelov12-Dec-16 13:31
memberDmitry Gorelov12-Dec-16 13:31 
QuestionNetwork Sniffer in another language Pin
Adamsonn14-Aug-14 1:43
memberAdamsonn14-Aug-14 1:43 
BugMemory leaking Pin
ruiwng4-Mar-13 1:34
memberruiwng4-Mar-13 1:34 
Questionaccess permissions Pin
yudaavni18-Feb-13 5:01
memberyudaavni18-Feb-13 5:01 
AnswerRe: access permissions Pin
ruiwng4-Mar-13 1:39
memberruiwng4-Mar-13 1:39 
QuestionNetwork problems Pin
AJMAL SHAHZAD10-Dec-12 19:48
memberAJMAL SHAHZAD10-Dec-12 19:48 
QuestionI've got problem with commpiling on VS 2008 Pin
1nbveh24-Apr-12 5:21
member1nbveh24-Apr-12 5:21 
AnswerRe: I've got problem with commpiling on VS 2008 Pin
lakshmanakumar_varada7-Nov-12 23:58
memberlakshmanakumar_varada7-Nov-12 23:58 
GeneralMy vote of 1 Pin
robmar8-Nov-11 13:08
memberrobmar8-Nov-11 13:08 
AnswerRe: My vote of 1 Pin
boris.pong18-Jun-12 22:23
memberboris.pong18-Jun-12 22:23 
Questioncan't build in visual 2010 + MS SDK 7.0 Pin
Yohanes Pradono23-Jul-11 20:11
memberYohanes Pradono23-Jul-11 20:11 
AnswerRe: can't build in visual 2010 + MS SDK 7.0 Pin
mla15427-Sep-11 7:26
membermla15427-Sep-11 7:26 
Questionhey how to run this project ............... Pin
silverkali13-Oct-10 3:53
membersilverkali13-Oct-10 3:53 
AnswerRe: hey how to run this project ............... Pin
Yohanes Pradono23-Jul-11 16:26
memberYohanes Pradono23-Jul-11 16:26 
GeneralMy vote of 1 Pin
dheeraj_jun218-Dec-08 18:34
memberdheeraj_jun218-Dec-08 18:34 
Generalpacket sniffer Pin
satheesh.S28-Oct-08 20:39
membersatheesh.S28-Oct-08 20:39 
GeneralRe: packet sniffer Pin
priyanka,oberoi110-Aug-09 2:33
memberpriyanka,oberoi110-Aug-09 2:33 
GeneralGood Project, what is the format to save? does it support Packetbone Pin
jerrysmith2222-Jul-08 18:50
memberjerrysmith2222-Jul-08 18:50 
GeneralWhich compiler? Visual C++ .NET? (=Version 7) Pin
gerspeece28-Mar-08 6:16
membergerspeece28-Mar-08 6:16 
GeneralRe: Which compiler? Visual C++ .NET? (=Version 7) Pin
Eran Aharonovich29-Mar-08 1:33
memberEran Aharonovich29-Mar-08 1:33 
Questionhelp me how to compile and execute the project.... Pin
rahul.csit28-Feb-08 18:36
memberrahul.csit28-Feb-08 18:36 
QuestionIt works in visual c++ 6.0?? Pin
uriel_slp24-Oct-07 11:23
memberuriel_slp24-Oct-07 11:23 
AnswerRe: It works in visual c++ 6.0?? Pin
uriel_slp24-Oct-07 11:27
memberuriel_slp24-Oct-07 11:27 
QuestionPlease I Need Help Pin
mustafa_kh_200710-Sep-07 5:03
membermustafa_kh_200710-Sep-07 5:03 
QuestionWe can catch the TCP packet only? Pin
MD8414-May-07 22:57
memberMD8414-May-07 22:57 
AnswerRe: We can catch the TCP packet only? Pin
Eran Aharonovich14-May-07 23:03
memberEran Aharonovich14-May-07 23:03 
GeneralRe: We can catch the TCP packet only? Pin
priyanka,oberoi110-Aug-09 2:37
memberpriyanka,oberoi110-Aug-09 2:37 
Generalgetting IP address Pin
AYcoder7-Aug-06 10:08
memberAYcoder7-Aug-06 10:08 
QuestionOutbound traffic is not catched Pin
John Ashraf24-Jul-06 13:22
memberJohn Ashraf24-Jul-06 13:22 
Generalrunning the network sniffer Pin
ujal13-Jul-06 8:18
memberujal13-Jul-06 8:18 
GeneralRe: running the network sniffer Pin
Eran Aharonovich13-Jul-06 8:27
memberEran Aharonovich13-Jul-06 8:27 
GeneralRe: running the network sniffer Pin
ujal14-Jul-06 6:33
memberujal14-Jul-06 6:33 
Generaldisplay number of packets Pin
dReAmWoNderS5-Jul-06 5:48
memberdReAmWoNderS5-Jul-06 5:48 
QuestionMore fragments problem Pin
Wouter Dhondt18-Jun-06 6:06
memberWouter Dhondt18-Jun-06 6:06 
GeneralXP SP2 Problem Pin
jopus22-Jul-05 12:31
memberjopus22-Jul-05 12:31 
GeneralI Get Inbound traffic only Pin
jopus28-Apr-05 21:23
memberjopus28-Apr-05 21:23 
GeneralPlease help me! Pin
dSolariuM29-Mar-05 5:45
memberdSolariuM29-Mar-05 5:45 
GeneralRe: Please help me! Pin
Eran Aharonovich30-Mar-05 7:32
memberEran Aharonovich30-Mar-05 7:32 
QuestionAnd the environment is? Pin
abica1-Mar-05 5:42
memberabica1-Mar-05 5:42 
AnswerRe: And the environment is? Pin
Eran Aharonovich25-Jul-05 2:07
memberEran Aharonovich25-Jul-05 2:07 
QuestionHow top begin writing a packet sniffer? Pin
grace4raghu227-Dec-04 5:42
membergrace4raghu227-Dec-04 5:42 
GeneralFeeto Pin
feeto27-Dec-04 4:46
sussfeeto27-Dec-04 4:46 
GeneralRe: Feeto Pin
Anonymous27-Dec-04 5:45
sussAnonymous27-Dec-04 5:45 
GeneralHi Pin
Sanjit Rath1-Nov-04 5:21
memberSanjit Rath1-Nov-04 5:21 
GeneralRe: Hi Pin
Eran Aharonovich25-Jul-05 2:22
memberEran Aharonovich25-Jul-05 2:22 
GeneralThe article Location Pin
sergeyv20028-Sep-04 11:26
membersergeyv20028-Sep-04 11:26 
GeneralRe: The article Location Pin
Eran Aharonovich30-Mar-05 7:33
memberEran Aharonovich30-Mar-05 7:33 
GeneralNice sniffer.. but.. Pin
Michael Hendrickx21-Aug-04 4:49
memberMichael Hendrickx21-Aug-04 4:49 
GeneralRe: Nice sniffer.. but.. Pin
Eran Aharonovich21-Aug-04 8:43
memberEran Aharonovich21-Aug-04 8:43 
GeneralRe: Nice sniffer.. but.. Pin
Michael Hendrickx21-Aug-04 21:37
memberMichael Hendrickx21-Aug-04 21:37 
Oops, though you were using no threads at all.. but you are Smile | :)

My bad

"live life one cpu cycle at a time".

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