Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

A router/switch with a port that receives ALL packets

Posted on 2007-11-20
7
Medium Priority
?
471 Views
Last Modified: 2010-08-05
I've heard that they make routers and/or switches that have a special port on them that recieves ALL network traffic.  THis would be for using with a packet sniffer.  Does anyone know of an inexpensive router/switch with this type of port?  What is this type of port called?

Also, anyone recommend an inexpensive software that will monitor all network traffic when connected to this port?

Bottom line:  I need a router/switch with a "receive all" port and some software...cheap.  (yeah, right)
0
Comment
Question by:markefaris
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
7 Comments
 
LVL 16

Assisted Solution

by:grahamnonweiler
grahamnonweiler earned 700 total points
ID: 20321697
If all you want to do is monitor traffic on your network then you don't need to change your router - just download and install Wireshark (free) on to one of your internal machines then let it monitor whats going on on your network.

Wireshark a recognised network traffic analyzer and will report on all traffic/ports/protocols in the same subnet as the monitoring machine. Nothing else to add to your existing network and far easier than installing a managed router with monitoring firmware!

For more information and download: http://www.wireshark.org/
0
 
LVL 15

Accepted Solution

by:
getzjd earned 1300 total points
ID: 20321760


You need a switch that supports what is called "port mirroring "
You did not state how many port you need so it is hard to make a recommendation.

Here is a short list of switches http://www.effetech.com/sniffer/faq.htm

Tcpdump, WinDump, and Ethereal are 3 open source sniffers you can use.
0
 
LVL 15

Expert Comment

by:getzjd
ID: 20321783
You cannot simply just use wireshark in a switched environment.  If you have a hub, then go for it.  Otherwise you need a switch that supports port mirroring
0
Optimum High-Definition Video Viewing and Control

The ATEN VM0404HA 4x4 4K HDMI Matrix Switch supports 4K resolutions of UHD (3840 x 2160) and DCI (4096 x 2160) with refresh rates of 30 Hz (4:4:4) and 60 Hz (4:2:0). It is ideal for applications where the routing of 4K digital signals is required.

 
LVL 15

Expert Comment

by:getzjd
ID: 20321792
If you use wireshark in a switched environment with no port mirroring then all you see is your PC traffic and broacasts
0
 
LVL 16

Expert Comment

by:grahamnonweiler
ID: 20321832
"If you use wireshark in a switched environment with no port mirroring then all you see is your PC traffic and broadcasts" - this is not strictly correct as the ability of Wireshark to see network traffic is dependent on the type of NIC in place on the monitoring PC  and whether you are in a "managed" or "un-managed" environment.
0
 
LVL 15

Expert Comment

by:getzjd
ID: 20321949
You basically stated what I already stated.  Managed or unmanaged is no different that saying a switch that supports port mirroring and one that doesnt.   Yes your network card may not support it, but if it does and you are in a switched environment you need a switch that supports port mirroring  as well... period.   Port mirroring to my knoweldge is ONLY found on managed switches.  I would venture to say that not every single managed switched provides port mirroring...
0
 

Author Closing Comment

by:markefaris
ID: 31410153
Thanks graham... for the wireshark link.
and thanks getzjd for recognizing that I was using a switch (which would not broadcast to all ports) and for the link of switches that have port mirroring (and for defining port mirroring).
0

Featured Post

New benefit for Premium Members - Upgrade now!

Ready to get started with anonymous questions today? It's easy! Learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is a guide to configure bridging on Cisco Routers.  This is something I never knew was possible until after making a few phone calls to Cisco.  Using bridging saved our company money by not requiring us to purchase a new switch.  Bridgi…
Creating an OSPF network that automatically (dynamically) reroutes network traffic over other connections to prevent network downtime.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

661 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question